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Reynolds J, Wilkins M, Martin D, Taggart M, Rivera KR, Tunc-Ozdemir M, Rufty T, Lobaton E, Bozkurt A, Daniele MA. Evaluating Bacterial Nanocellulose Interfaces for Recording Surface Biopotentials from Plants. Sensors (Basel) 2024; 24:2335. [PMID: 38610546 PMCID: PMC11014089 DOI: 10.3390/s24072335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 04/02/2024] [Accepted: 04/05/2024] [Indexed: 04/14/2024]
Abstract
The study of plant electrophysiology offers promising techniques to track plant health and stress in vivo for both agricultural and environmental monitoring applications. Use of superficial electrodes on the plant body to record surface potentials may provide new phenotyping insights. Bacterial nanocellulose (BNC) is a flexible, optically translucent, and water-vapor-permeable material with low manufacturing costs, making it an ideal substrate for non-invasive and non-destructive plant electrodes. This work presents BNC electrodes with screen-printed carbon (graphite) ink-based conductive traces and pads. It investigates the potential of these electrodes for plant surface electrophysiology measurements in comparison to commercially available standard wet gel and needle electrodes. The electrochemically active surface area and impedance of the BNC electrodes varied based on the annealing temperature and time over the ranges of 50 °C to 90 °C and 5 to 60 min, respectively. The water vapor transfer rate and optical transmittance of the BNC substrate were measured to estimate the level of occlusion caused by these surface electrodes on the plant tissue. The total reduction in chlorophyll content under the electrodes was measured after the electrodes were placed on maize leaves for up to 300 h, showing that the BNC caused only a 16% reduction. Maize leaf transpiration was reduced by only 20% under the BNC electrodes after 72 h compared to a 60% reduction under wet gel electrodes in 48 h. On three different model plants, BNC-carbon ink surface electrodes and standard invasive needle electrodes were shown to have a comparable signal quality, with a correlation coefficient of >0.9, when measuring surface biopotentials induced by acute environmental stressors. These are strong indications of the superior performance of the BNC substrate with screen-printed graphite ink as an electrode material for plant surface biopotential recordings.
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Affiliation(s)
- James Reynolds
- Department of Electrical and Computer Engineering, NC State University, Raleigh, NC 27606, USA; (J.R.); (E.L.); (A.B.)
| | - Michael Wilkins
- Department of Electrical and Computer Engineering, NC State University, Raleigh, NC 27606, USA; (J.R.); (E.L.); (A.B.)
| | - Devon Martin
- Department of Electrical and Computer Engineering, NC State University, Raleigh, NC 27606, USA; (J.R.); (E.L.); (A.B.)
| | - Matthew Taggart
- Department of Crop and Soil Sciences, NC State University, Raleigh, NC 27695, USA
| | - Kristina R. Rivera
- Joint Department of Biomedical Engineering, NC State University and University of North Carolina, Chapel Hill, NC 27695, USA
| | - Meral Tunc-Ozdemir
- Department of Biology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Thomas Rufty
- Department of Crop and Soil Sciences, NC State University, Raleigh, NC 27695, USA
| | - Edgar Lobaton
- Department of Electrical and Computer Engineering, NC State University, Raleigh, NC 27606, USA; (J.R.); (E.L.); (A.B.)
| | - Alper Bozkurt
- Department of Electrical and Computer Engineering, NC State University, Raleigh, NC 27606, USA; (J.R.); (E.L.); (A.B.)
| | - Michael A. Daniele
- Department of Electrical and Computer Engineering, NC State University, Raleigh, NC 27606, USA; (J.R.); (E.L.); (A.B.)
- Joint Department of Biomedical Engineering, NC State University and University of North Carolina, Chapel Hill, NC 27695, USA
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Park Y, Won DS, An JS, Kim SH, Ryu DS, Zeng CH, Kang JM, Kim JW, Kim HS, Park JH, Lee SS. Novel self-expandable stent-based endobiliary radiofrequency ablation for unresectable malignant biliary obstruction. Gastrointest Endosc 2024:S0016-5107(24)00218-9. [PMID: 38583543 DOI: 10.1016/j.gie.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 01/25/2024] [Accepted: 04/01/2024] [Indexed: 04/09/2024]
Abstract
BACKGROUND AND AIMS Endobiliary radiofrequency ablation (RFA) is an emerging endoscopic palliative adjunctive therapy used for the local treatment of unresectable malignant biliary obstruction (MBO). However, irregular ablation ranges caused by insufficient electrode-to-bile duct contact pose a significant obstacle. The aim was to investigate the feasibility of a self-expandable stent (SES)-based electrode with a customized RFA generator in the porcine liver and common bile duct (CBD). METHODS A SES-RFA system with polarity-switching was developed to perform endobiliary RFA. The ablation ranges of 20 ablation protocols were evaluated to validate the feasibility of the newly developed RFA system in the porcine liver. Nine of the 20 ablation protocols were selected for evaluation in the porcine CBD with cholangiography, endoscopy, and histological and immunohistochemical analysis. RESULTS The SES-RFA system with polarity-switching was successfully constructed and demonstrated high accuracy and reproducibility. The ablation area was clearly identified between the two SESs. The ablation ranges and degree of mucosal damage including TUNEL- and HSP70-positive depositions increased proportionally with ablation protocols in the porcine liver and CBD (all P < .05). Ablation length and depth linearly increased with ablation protocols from 8.74 ± 0.25 to 31.25 ± 0.67 mm and 1.61 ± 0.09 to 11.94 ± 0.44 mm, respectively. CONCLUSIONS The SES-RFA system with polarity-switching between electrodes provided an even circumferential area of ablation and enhanced ablation depth between the electrodes. This novel endobiliary RFA system is a promising modality for local ablation in patients with unresectable MBO.
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Affiliation(s)
- Yubeen Park
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea; Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Dong-Sung Won
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Jin Su An
- Department of Biomedical Engineering, School of ICT Convergence Engineering, College of Science & Technology, Konkuk University, 268 Chungwon-daero, Chungju-si, Chungcheongbuk-do 27478, Republic of Korea
| | - Song Hee Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea; Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Dae Sung Ryu
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea; Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Chu Hui Zeng
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Jeon Min Kang
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Ji Won Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea; Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Hyung Sik Kim
- Department of Mechatronics Engineering, School of ICT Convergence Engineering, College of Science & Technology, Konkuk University, 268 Chungwon-daero, Chungju-si, Chungcheongbuk-do 27478, Republic of Korea
| | - Jung-Hoon Park
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea; Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea.
| | - Sang Soo Lee
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea.
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Wang J, Li H, Warr GG, Chen F, Atkin R. Nanostructure and Dynamics of Aprotic Ionic Liquids at Graphite Electrodes as a Function of Potential. Small 2024:e2311353. [PMID: 38573945 DOI: 10.1002/smll.202311353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/05/2024] [Indexed: 04/06/2024]
Abstract
Atomic force microscope (AFM) videos reveal the near-surface nanostructure and dynamics of the ionic liquids (ILs) 1-butyl-3-methylimidazolium dicyanamide (BMIM DCA) and 1-hexyl-3-methylimidazolium dicyanamide (HMIM DCA) above highly oriented pyrolytic graphite (HOPG) electrodes as a function of surface potential. Molecular dynamics (MD) simulations reveal the molecular-level composition of the nanostructures. In combination, AFM and MD show that the near-surface aggregates form via solvophobic association of the cation alkyl chains at the electrode interface. The diffusion coefficients of interfacial nanostructures are ≈0.01 nm2 s-1 and vary with the cation alkyl chain length and the surface potential. For each IL, the nanostructure diffusion coefficients are similar at open-circuit potential (OCP) and OCP + 1V, but BMIM DCA moves about twice as fast as HMIM DCA. At negative potentials, the diffusion coefficient decreases for BMIM DCA and increases for HMIM DCA. When the surface potential is switched from negative to positive, a sudden change in the direction of the nanostructure motion is observed for both BMIM DCA and HMIM DCA. No transient dynamics are noted following other potential jumps. This study provides a new fundamental understanding regarding the dynamics of electrochemically stable ILs at electrodes vital for the rational development of IL-based electrochemical devices.
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Affiliation(s)
- Jianan Wang
- School of Molecular Sciences, The University of Western Australia, 35 Stirling Hwy, Perth, WA, 6009, Australia
| | - Hua Li
- School of Molecular Sciences, The University of Western Australia, 35 Stirling Hwy, Perth, WA, 6009, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, 35 Stirling Hwy, Perth, WA, 6009, Australia
| | - Gregory G Warr
- School of Chemistry and Sydney Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Fangfang Chen
- Institute for Frontier Materials (IFM), Deakin University, Waurn Ponds, Geelong, VIC, 3216, Australia
| | - Rob Atkin
- School of Molecular Sciences, The University of Western Australia, 35 Stirling Hwy, Perth, WA, 6009, Australia
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Bower KL, Noecker AM, Frankemolle-Gilbert AM, McIntyre CC. Model-Based Analysis of Pathway Recruitment During Subthalamic Deep Brain Stimulation. Neuromodulation 2024; 27:455-463. [PMID: 37097269 PMCID: PMC10598236 DOI: 10.1016/j.neurom.2023.02.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 02/06/2023] [Accepted: 02/27/2023] [Indexed: 04/26/2023]
Abstract
BACKGROUND Subthalamic deep brain stimulation (DBS) is an established clinical therapy, but an anatomically clear definition of the underlying neural target(s) of the stimulation remains elusive. Patient-specific models of DBS are commonly used tools in the search for stimulation targets, and recent iterations of those models are focused on characterizing the brain connections that are activated by DBS. OBJECTIVE The goal of this study was to quantify axonal pathway activation in the subthalamic region from DBS at different electrode locations and stimulation settings. MATERIALS AND METHODS We used an anatomically and electrically detailed computational model of subthalamic DBS to generate recruitment curves for eight different axonal pathways of interest, at three generalized DBS electrode locations in the subthalamic nucleus (STN) (ie, central STN, dorsal STN, posterior STN). These simulations were performed with three levels of DBS electrode localization uncertainty (ie, 0.5 mm, 1.0 mm, 1.5 mm). RESULTS The recruitment curves highlight the diversity of pathways that are theoretically activated with subthalamic DBS, in addition to the dependence of the stimulation location and parameter settings on the pathway activation estimates. The three generalized DBS locations exhibited distinct pathway recruitment curve profiles, suggesting that each stimulation location would have a different effect on network activity patterns. We also found that the use of anodic stimuli could help limit activation of the internal capsule relative to other pathways. However, incorporating realistic levels of DBS electrode localization uncertainty in the models substantially limits their predictive capabilities. CONCLUSIONS Subtle differences in stimulation location and/or parameter settings can impact the collection of pathways that are activated during subthalamic DBS.
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Affiliation(s)
- Kelsey L Bower
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Angela M Noecker
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA; Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | | | - Cameron C McIntyre
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA; Department of Biomedical Engineering, Duke University, Durham, NC, USA; Department of Neurosurgery, Duke University, Durham, NC, USA.
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Liu Q, Li R, Li J, Zheng B, Song S, Chen L, Li T, Ma Y. The Utilization of Metal-Organic Frameworks and Their Derivatives Composite in Supercapacitor Electrodes. Chemistry 2024:e202400157. [PMID: 38520385 DOI: 10.1002/chem.202400157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 03/10/2024] [Accepted: 03/20/2024] [Indexed: 03/25/2024]
Abstract
Up to now, the mainstream adoption of renewable energy has brought about substantial transformations in the electricity and energy sector. This shift has garnered considerable attention within the scientific community. Supercapacitors, known for their exceptional performance metrics like good charge/discharge capability, strong power density, as well as extended cycle longevity, have gained widespread traction across various sectors, including transportation and aviation. Metal-organic frameworks (MOFs) with unique traits including adaptable structure, highly customizable synthetic methods, and high specific surface area, have emerged as strong candidates for electrode materials. For enhancing the performance, MOFs are commonly compounded with other conducting materials to increase capacitance. This paper provides a detailed analysis of various common preparation strategies and characteristics of MOFs. It summarizes the recent application of MOFs and their derivatives as supercapacitor electrodes alongside other carbon materials, metal compounds, and conductive polymers. Additionally, the challenges encountered by MOFs in the realm of supercapacitor applications are thoroughly discussed. Compared to previous reviews, the content of this paper is more comprehensive, offering readers a deeper understanding of the diverse applications of MOFs. Furthermore, it provides valuable suggestions and guidance for future progress and development in the field of MOFs.
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Affiliation(s)
- Qianwen Liu
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
| | - Ruidong Li
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
| | - Jie Li
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
| | - Bingyue Zheng
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
| | - Shuxin Song
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
| | - Lihua Chen
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
| | - Tingxi Li
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
| | - Yong Ma
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, P. R. China
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Appiah-Ntiamoah R, Kim H. Leveraging Direct Pyrolysis for the Synthesis of 10 nm Monodispersed Fe 3O 4/Fe 3C NPS@Carbon to Improve SupercapacitANCE in Acidic Electrolyte. ChemSusChem 2024:e202400085. [PMID: 38511252 DOI: 10.1002/cssc.202400085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/11/2024] [Accepted: 03/20/2024] [Indexed: 03/22/2024]
Abstract
The prevailing practice advocates pre-oxidation of electrospun Fe-salt/polymer nanofibers (Fe-salt/polymer Nf) before pyrolysis as advantageous in the production of high-performance FeOx@carbon nanofibers supercapacitors (FeOx@C). However, our study systematically challenges this notion by demonstrating that pre-oxidation facilitates the formation of polydispersed and large FeOx nanoparticles (FeOx@CI-DA) through "external" Fe3+ Kirkendall diffusion from carbon, resulting in subpar electrochemical properties. To address this, direct pyrolysis of Fe-salt/polymer Nf is proposed, promoting "internal" Fe3+ Kirkendall diffusion within carbon and providing substantial physical confinement, leading to the formation of monodispersed and small FeOx nanoparticles (FeOx@CDA). In 1 M H2SO4, FeOx@CDA demonstrates ~2.60× and 1.26× faster SO4 2- diffusivity, and electron transfer kinetics, respectively, compared to FeOx@CI-DA, with a correspondingly ~1.50× greater effective surface area. Consequently, FeOx@CDA exhibits a specific capacity of 161.92 mAhg-1, ~2× higher than FeOx@CI-DA, with a rate capability ~19 % greater. Moreover, FeOx@CDA retains 94 % of its capacitance after 5000 GCD cycles, delivering an energy density of 26.68 Whkg-1 in a FeOx@CDA//FeOx@CDA device, rivaling state-of-the-art FeOx/carbon electrodes in less Fe-corrosive electrolytes. However, it is worth noting that the effectiveness of direct pyrolysis is contingent upon hydrated Fe-salt. These findings reveal a straightforward approach to enhancing the supercapacitance of FeOx@C materials.
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Affiliation(s)
- Richard Appiah-Ntiamoah
- Department of Energy Science and Technology, Environmental Waste Recycle Institute, Myongji University, Yongin, Gyeonggi-do, 17058, Republic of Korea, and
| | - Hern Kim
- Department of Energy Science and Technology, Environmental Waste Recycle Institute, Myongji University, Yongin, Gyeonggi-do, 17058, Republic of Korea, and
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Gautam I, Shaw A, Brickman D, Mahajan A, Jeyakumar A. Creation of a Prototype Cochlear Training Model. Ann Otol Rhinol Laryngol 2024:34894241238868. [PMID: 38491865 DOI: 10.1177/00034894241238868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2024]
Abstract
OBJECTIVE Creation of a novel 3D-printed physical cochlear model that demonstrated the feasibility of creating the model, and impact of a Graphical User Interface (GUI) system on training insertion metrics. STUDY DESIGN Feasibility study with a pilot prospective data collection. SETTING Tertiary academic center. METHODS The study was IRB exempt. Five resident trainees (PGY1-PGY5) practiced electrode insertions in cadaveric temporal bones before using the simulator. Nine students were educated on how to hold the electrodes and position them, and then allowed to use the simulator. All trainees were instructed that slower insertions were favorable. One cochlear implant (CI) surgeon used the simulator. The GUI captured the real video feed, but also provided distance, trajectory, and velocity measurements. The program is designed to plot the real-time depth of insertion and speed of insertion of the electrode; the user is also provided real-time occurrence of any kinks and back-outs. RESULTS A total of 14 trainees and 1 CI surgeon inserted the electrode at least 5 times without the use of the GUI (before) and then at least 5 times with the use of the GUI (after). Average Speed before and after (100.84 and 53.23 mm/s); Average minimum speed before and after (59.34 and 9.65 mm/s); and Average maximum speed before and after (416 and 285.81 mm/s). Statistically significant improvements were noted in all the measured speeds of insertion (P < .001). The other variables improved but not to a statistical significance. CONCLUSIONS Real-time training using the 3D-printed model and GUI for cochlear implantation can help improve surgical resident training and comfort levels with electrode insertion for surgical trainees. The advantage of this model is that surgeons/trainees can use it as many times as they like, as the whole set-up is easy, economical, and reusable. The real time graphical user interface enhances training and retention of the practiced skills.
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Affiliation(s)
- Ishwor Gautam
- Biomedical Engineering, Department of Biomedical Engineering, The University of Akron, Akron, OH, USA
| | - Avi Shaw
- Department of Otolaryngology, Mercy Bon Secours, Youngstown, OH, USA
| | - Dhiren Brickman
- Department of Computer Science, Ashland University, Ashland, OH, USA
| | - Ajay Mahajan
- Biomedical Engineering, Department of Biomedical Engineering, The University of Akron, Akron, OH, USA
| | - Anita Jeyakumar
- Department of Otolaryngology, Mercy Bon Secours, Youngstown, OH, USA
- Northeast Ohio Medical University, Rootstown, OH, USA
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Xu Q, Huang Z, Shen S, Yan M, Gong T, Ji C. A modified needle knife using electrosurgical electrode in skin surgery. J Am Acad Dermatol 2024; 90:e99-e100. [PMID: 36967020 DOI: 10.1016/j.jaad.2023.02.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 02/09/2023] [Accepted: 02/19/2023] [Indexed: 04/20/2023]
Affiliation(s)
- Qiuyun Xu
- Department of Dermatology, Institute of Dermatology and Venereology, Fujian Dermatology and Venereology Research Institute, Key Laboratory of Skin Cancer of Fujian Higher Education Institutions, the First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Zugen Huang
- Department of Plastic & Cosmetic Surgery, the First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Shuyi Shen
- Department of Dermatology, Institute of Dermatology and Venereology, Fujian Dermatology and Venereology Research Institute, Key Laboratory of Skin Cancer of Fujian Higher Education Institutions, the First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Manlin Yan
- Fuzhou Kangtai Physical Examination Center, Fuzhou, People's Republic of China
| | - Ting Gong
- Central Laboratory, the First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Chao Ji
- Department of Dermatology, Institute of Dermatology and Venereology, Fujian Dermatology and Venereology Research Institute, Key Laboratory of Skin Cancer of Fujian Higher Education Institutions, the First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China.
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Sikora A, Gemini L, Faucon M, Mincuzzi G. Benefits of Femtosecond Laser 40 MHz Burst Mode for Li-Ion Battery Electrode Structuring. Materials (Basel) 2024; 17:881. [PMID: 38399133 PMCID: PMC10890052 DOI: 10.3390/ma17040881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/09/2024] [Accepted: 02/12/2024] [Indexed: 02/25/2024]
Abstract
In Li-ion batteries, ion diffusion kinetics represent a limitation to combine high capacity and a fast charging rate. To bypass this, textured electrodes have been demonstrated to increase the active surface, decrease the material tortuosity and accelerate the electrolyte wetting. Amongst the structuring technologies, ultrashort pulse laser processing may represent the key option enabling, at the same time, high precision, negligible material deterioration and high throughput. Here, we report a study on the structuring of electrodes with both holes and grooves reaching the metallic collector. Electrochemical models emphasize the importance of hole and line dimensions for the performances of the cell. We demonstrate that we can control the hole and line width by adjusting the applied fluence and the repetition rate. In addition, results show that it is possible to drill 65 µm-deep and ~15 µm-wide holes in nearly 100 µs resulting in up to 10,000 holes/s. To further reduce the takt time, bursts of 40 MHz pulses were also investigated. We show that bursts can reduce the takt time by a factor that increases with the average power and the burst length. Moreover, at comparable fluence, we show that bursts can shorten the process more than theoretically expected.
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Affiliation(s)
- Aurélien Sikora
- Alphanov, Aquitaine Institute of Optics, Rue F. Mitterrand, 33400 Talence, France
| | | | | | - Girolamo Mincuzzi
- Alphanov, Aquitaine Institute of Optics, Rue F. Mitterrand, 33400 Talence, France
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Shin BJ, Kim HC, Kim DH, Cho HH. Intraoperative Handheld Digital X-ray for Assessment of Intracochlear Positioning of Electrode Arrays in Recipients of Cochlear Implants. Ear Nose Throat J 2024:1455613231223954. [PMID: 38321704 DOI: 10.1177/01455613231223954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024] Open
Abstract
Objectives: This study aims to evaluate the practicality of handheld digital X-ray in determining the position of the electrode array following Cochlear implantation (CI). Methods: A retrospective study was conducted involving 11 patients (12 ears) who underwent intraoperative imaging via handheld X-ray (MINE ALNU®, OTOM, Gwangju, South Korea) post-CI between December 2021 and January 2023. Immediate confirmation of the correct electrode array placement in the cochlea was achieved, with subsequent comparisons made to C-arm image and postoperative transorbital view X-ray. Results: Rapid intraoperative imaging was achieved in all instances. The electrode types used included 9 Nucleus slim modiolar electrodes, 1 Nucleus contour electrode, and 2 Medel flex26 electrodes. A malpositioned electrode array was detected in one patient. The handheld digital X-ray also adeptly visualized the electrodes implanted in pediatric patients. Conclusions: The use of intraoperative handheld digital X-ray using MINE ALNU® proves to be a safe, efficient, straightforward, and reliable method for immediate identification of an inserted electrode array. It has potential to replace the traditional C-arm X-ray for verifying electrode positioning in the operating room.
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Affiliation(s)
- Bong-Jin Shin
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, South Korea
| | - Hong Chan Kim
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, South Korea
| | - Do Hyung Kim
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, South Korea
| | - Hyong-Ho Cho
- Department of Otolaryngology-Head and Neck Surgery, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, South Korea
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Czagany M, Hompoth S, Keshri AK, Pandit N, Galambos I, Gacsi Z, Baumli P. Supercapacitors: An Efficient Way for Energy Storage Application. Materials (Basel) 2024; 17:702. [PMID: 38591562 PMCID: PMC10856355 DOI: 10.3390/ma17030702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/13/2024] [Accepted: 01/29/2024] [Indexed: 04/10/2024]
Abstract
To date, batteries are the most widely used energy storage devices, fulfilling the requirements of different industrial and consumer applications. However, the efficient use of renewable energy sources and the emergence of wearable electronics has created the need for new requirements such as high-speed energy delivery, faster charge-discharge speeds, longer lifetimes, and reusability. This leads to the need for supercapacitors, which can be a good complement to batteries. However, one of their drawbacks is their lower energy storage capability, which has triggered worldwide research efforts to increase their energy density. With the introduction of novel nanostructured materials, hierarchical pore structures, hybrid devices combining these materials, and unconventional electrolytes, significant developments have been reported in the literature. This paper reviews the short history of the evolution of supercapacitors and the fundamental aspects of supercapacitors, positioning them among other energy-storage systems. The main electrochemical measurement methods used to characterize their energy storage features are discussed with a focus on their specific characteristics and limitations. High importance is given to the integral components of the supercapacitor cell, particularly to the electrode materials and the different types of electrolytes that determine the performance of the supercapacitor device (e.g., storage capability, power output, cycling stability). Current directions in the development of electrode materials, including carbonaceous forms, transition metal-based compounds, conducting polymers, and novel materials are discussed. The synergy between the electrode material and the current collector is a key factor, as well as the fine-tuning of the electrode material and electrolyte.
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Affiliation(s)
- Mate Czagany
- Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, 3515 Miskolc, Hungary; (S.H.); (Z.G.)
| | - Szabolcs Hompoth
- Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, 3515 Miskolc, Hungary; (S.H.); (Z.G.)
| | - Anup Kumar Keshri
- Plasma Spray Coating Laboratory, Metallurgical and Materials Engineering, Indian Institute of Technology Patna, Bihta 801106, Bihar, India; (A.K.K.); (N.P.)
| | - Niranjan Pandit
- Plasma Spray Coating Laboratory, Metallurgical and Materials Engineering, Indian Institute of Technology Patna, Bihta 801106, Bihar, India; (A.K.K.); (N.P.)
| | | | - Zoltan Gacsi
- Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, 3515 Miskolc, Hungary; (S.H.); (Z.G.)
| | - Peter Baumli
- Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, 3515 Miskolc, Hungary; (S.H.); (Z.G.)
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12
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Alizadeh F, Saviz M, Khoraminia F, Talebipour A, Imani R, Shabani I. EMEMI: An interference-free mini-incubator with integrated electric and magnetic field exposure for real-time microscopic imaging of field effects. Bioelectromagnetics 2024; 45:33-47. [PMID: 37789661 DOI: 10.1002/bem.22483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 08/11/2023] [Accepted: 08/25/2023] [Indexed: 10/05/2023]
Abstract
Uninterrupted microscopic observation and real-time imaging of cell behavior during exposure to the stimulus, for example, electric and/or magnetic fields, especially for periods of several days, has been a challenge in experimental bioelectromagnetics due to a lack of proper gas/temperature conditions outside the incubator. Conventional mini-incubators might suffer from stray fields produced by heating elements. We report an in vitro electric and magnetic fields (EMF) exposure system embedded inside a novel under-the-microscope mini-CO2 -incubator with a unique design to avoid electromagnetic interference from the heating and circulation functions while ensuring the requisite temperature. A unique, reconfigurable array of electrodes and/or coils excited by calculated current distributions among array elements is designed to provide excellent field uniformity and controllable linear or circular polarization (even at very low frequencies) of the EMF within the cell culture. Using standard biochemical assays, long-term cell viability has been verified and compared with a conventional incubator. Cell orientation/migration in three-dimensional culture made of collagen-hydrogels has been successfully observed in vitro, in long-term, and in real-time under the influence of DC electric fields with the device.
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Affiliation(s)
- Farhad Alizadeh
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Mehrdad Saviz
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Farbod Khoraminia
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Ali Talebipour
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Rana Imani
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Iman Shabani
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
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13
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Zhang F, Zhou J, Chen X, Zhao S, Zhao Y, Tang Y, Tian Z, Yang Q, Slavcheva E, Lin Y, Zhang Q. The Recent Progresses of Electrodes and Electrolysers for Seawater Electrolysis. Nanomaterials (Basel) 2024; 14:239. [PMID: 38334510 PMCID: PMC10856650 DOI: 10.3390/nano14030239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/18/2024] [Accepted: 01/18/2024] [Indexed: 02/10/2024]
Abstract
The utilization of renewable energy for hydrogen production presents a promising pathway towards achieving carbon neutrality in energy consumption. Water electrolysis, utilizing pure water, has proven to be a robust technology for clean hydrogen production. Recently, seawater electrolysis has emerged as an attractive alternative due to the limitations of deep-sea regions imposed by the transmission capacity of long-distance undersea cables. However, seawater electrolysis faces several challenges, including the slow kinetics of the oxygen evolution reaction (OER), the competing chlorine evolution reaction (CER) processes, electrode degradation caused by chloride ions, and the formation of precipitates on the cathode. The electrode and catalyst materials are corroded by the Cl- under long-term operations. Numerous efforts have been made to address these issues arising from impurities in the seawater. This review focuses on recent progress in developing high-performance electrodes and electrolyser designs for efficient seawater electrolysis. Its aim is to provide a systematic and insightful introduction and discussion on seawater electrolysers and electrodes with the hope of promoting the utilization of offshore renewable energy sources through seawater electrolysis.
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Affiliation(s)
- Fan Zhang
- Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province, Hangzhou 311122, China; (F.Z.); (X.C.); (S.Z.)
- Key Laboratory of Advanced Fuel Cells and Electrolysers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China; (Y.Z.); (Y.T.); (Z.T.); (Q.Y.)
- Renewable Energy Engineering Institute, Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China
| | - Junjie Zhou
- Key Laboratory of Advanced Fuel Cells and Electrolysers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China; (Y.Z.); (Y.T.); (Z.T.); (Q.Y.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaofeng Chen
- Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province, Hangzhou 311122, China; (F.Z.); (X.C.); (S.Z.)
- Renewable Energy Engineering Institute, Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China
| | - Shengxiao Zhao
- Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province, Hangzhou 311122, China; (F.Z.); (X.C.); (S.Z.)
- Renewable Energy Engineering Institute, Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China
| | - Yayun Zhao
- Key Laboratory of Advanced Fuel Cells and Electrolysers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China; (Y.Z.); (Y.T.); (Z.T.); (Q.Y.)
| | - Yulong Tang
- Key Laboratory of Advanced Fuel Cells and Electrolysers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China; (Y.Z.); (Y.T.); (Z.T.); (Q.Y.)
| | - Ziqi Tian
- Key Laboratory of Advanced Fuel Cells and Electrolysers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China; (Y.Z.); (Y.T.); (Z.T.); (Q.Y.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qihao Yang
- Key Laboratory of Advanced Fuel Cells and Electrolysers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China; (Y.Z.); (Y.T.); (Z.T.); (Q.Y.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Qianwan Institute of CNITECH, Ningbo 315201, China
| | - Evelina Slavcheva
- Institute of Electrochemistry and Energy Systems of Bulgaria Academic Science (IEES), Akad. G. Bonchev 10, 1113 Sofia, Bulgaria;
| | - Yichao Lin
- Key Laboratory of Advanced Fuel Cells and Electrolysers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China; (Y.Z.); (Y.T.); (Z.T.); (Q.Y.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiuju Zhang
- Key Laboratory of Advanced Fuel Cells and Electrolysers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo 315201, China; (Y.Z.); (Y.T.); (Z.T.); (Q.Y.)
- University of Chinese Academy of Sciences, Beijing 100049, China
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14
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Wang L, Guo R, Li L, Tao Q, Xu Q, Yang X, Liu X, Li J, Wang L, Chang J, Cao C, Wen Y, Song S, Liu G. Construction of an Enzyme Cascade Based on the Accurate Adjacent Arrangement of Coupled Enzymes Using a Triblock PolyA DNA Probe. JACS Au 2024; 4:228-236. [PMID: 38274249 PMCID: PMC10806774 DOI: 10.1021/jacsau.3c00673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/20/2023] [Accepted: 11/28/2023] [Indexed: 01/27/2024]
Abstract
Intracellular enzyme cascades are essential for various biological processes, and mimicking their functions in artificial systems has attracted significant research attention. However, achieving convenient and efficient spatial organization of enzymes on interfaces remains a critical challenge. In this work, we designed a simple single-DNA scaffold using triblock polyA single-stranded DNA for the arrangement of coupled enzymes. The scaffold was assembled onto a gold electrode through the affinity of polyA-Au, and two enzymes (glucose oxidase and horseradish peroxidase) were captured through hybridization. The molecular distance between the enzymes was regulated by changing the length of the polyA fragment. As a proof of concept, a glucose biosensor was constructed based on the enzyme cascade amplification. The biosensor exhibited excellent detection capability for glucose in human serum samples with a limit of detection of 1.6 μM. Additionally, a trienzyme cascade reaction was successfully activated, demonstrating the potential scalability of our approach for multienzyme reactions. This study provides a promising platform for the development of easy-to-operate, highly efficient, and versatile enzyme cascade systems using DNA scaffolds.
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Affiliation(s)
- Lele Wang
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Ruiyan Guo
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Lanying Li
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Qing Tao
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Qin Xu
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Xue Yang
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Xue Liu
- Institute
of Materiobiology, Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China
| | - Jiang Li
- Institute
of Materiobiology, Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China
| | - Lihua Wang
- Institute
of Materiobiology, Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China
| | - Jinxue Chang
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Chengming Cao
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Yanli Wen
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
| | - Shiping Song
- Institute
of Materiobiology, Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China
| | - Gang Liu
- Key
Laboratory of Bioanalysis and Metrology for state market regulation, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
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15
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Chin HT, Wang DC, Gulo DP, Yao YC, Yeh HC, Muthu J, Chen DR, Kao TC, Kalbáč M, Lin PH, Cheng CM, Hofmann M, Liang CT, Liu HL, Chuang FC, Hsieh YP. Tungsten Nitride (W 5N 6): An Ultraresilient 2D Semimetal. Nano Lett 2024; 24:67-73. [PMID: 38149785 DOI: 10.1021/acs.nanolett.3c03243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Two-dimensional transition metal nitrides offer intriguing possibilities for achieving novel electronic and mechanical functionality owing to their distinctive and tunable bonding characteristics compared to other 2D materials. We demonstrate here the enabling effects of strong bonding on the morphology and functionality of 2D tungsten nitrides. The employed bottom-up synthesis experienced a unique substrate stabilization effect beyond van-der-Waals epitaxy that favored W5N6 over lower metal nitrides. Comprehensive structural and electronic characterization reveals that monolayer W5N6 can be synthesized at large scale and shows semimetallic behavior with an intriguing indirect band structure. Moreover, the material exhibits exceptional resilience against mechanical damage and chemical reactions. Leveraging these electronic properties and robustness, we demonstrate the application of W5N6 as atomic-scale dry etch stops that allow the integration of high-performance 2D materials contacts. These findings highlight the potential of 2D transition metal nitrides for realizing advanced electronic devices and functional interfaces.
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Affiliation(s)
- Hao-Ting Chin
- Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 10617, Taiwan
- International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei 10617, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Deng-Chi Wang
- Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
| | | | - Yu-Chi Yao
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Hao-Chen Yeh
- Institute of Physics, Academia Sinica, Taipei 115201, Taiwan
| | - Jeyavelan Muthu
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
- International Graduate Program of Nano Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Ding-Rui Chen
- Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 10617, Taiwan
- International Graduate Program of Molecular Science and Technology, National Taiwan University, Taipei 10617, Taiwan
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Tzu-Chun Kao
- Graduate Institute of Applied Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Martin Kalbáč
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Prague, Czech Republic
| | - Ping-Hui Lin
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 300092, Taiwan
| | - Cheng-Maw Cheng
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 300092, Taiwan
| | - Mario Hofmann
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Chi-Te Liang
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Hsiang-Lin Liu
- Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Feng-Chuan Chuang
- Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
- Physics Division, National Center for Theoretical Sciences, Taipei 10617, Taiwan
- Center for Theoretical and Computational Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Ya-Ping Hsieh
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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16
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Kirk EA, Sauerbrei BA. Accessing populations of motor units. eLife 2024; 13:e94764. [PMID: 38175188 PMCID: PMC10766347 DOI: 10.7554/elife.94764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024] Open
Abstract
A new device improves the way scientists can record the activity of motor units in a wide range of animals and settings.
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Affiliation(s)
- Eric A Kirk
- Department of Neurosciences, School of Medicine, Case Western Reserve UniversityClevelandUnited States
| | - Britton A Sauerbrei
- Department of Neurosciences, School of Medicine, Case Western Reserve UniversityClevelandUnited States
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17
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Kim S, Park S, Pak JJ. Multi-Modal Multi-Array Electrochemical and Optical Sensor Suite for a Biological CubeSat Payload. Sensors (Basel) 2024; 24:265. [PMID: 38203127 PMCID: PMC10781281 DOI: 10.3390/s24010265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024]
Abstract
CubeSats have emerged as cost-effective platforms for biological research in low Earth orbit (LEO). However, they have traditionally been limited to optical absorbance sensors for studying microbial growth. This work has made improvements to the sensing capabilities of these small satellites by incorporating electrochemical ion-selective pH and pNa sensors with optical absorbance sensors to enrich biological experimentation and greatly expand the capabilities of these payloads. We have designed, built, and tested a multi-modal multi-array electrochemical-optical sensor module and its ancillary systems, including a fluidic card and an on-board payload computer with custom firmware. Laboratory tests showed that the module could endure high flow rates (1 mL/min) without leakage, and the 27-well, 81-electrode sensor card accurately detected pH (71.0 mV/pH), sodium ion concentration (75.2 mV/pNa), and absorbance (0.067 AU), with the sensors demonstrating precise linear responses (R2 ≈ 0.99) in various test solutions. The successful development and integration of this technology conclude that CubeSat bio-payloads are now poised for more complex and detailed investigations of biological phenomena in space, marking a significant enhancement of small-satellite research capabilities.
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Affiliation(s)
| | | | - James Jungho Pak
- School of Electrical Engineering, Korea University, Seoul 02841, Republic of Korea; (S.K.); (S.P.)
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18
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Chung B, Zia M, Thomas KA, Michaels JA, Jacob A, Pack A, Williams MJ, Nagapudi K, Teng LH, Arrambide E, Ouellette L, Oey N, Gibbs R, Anschutz P, Lu J, Wu Y, Kashefi M, Oya T, Kersten R, Mosberger AC, O'Connell S, Wang R, Marques H, Mendes AR, Lenschow C, Kondakath G, Kim JJ, Olson W, Quinn KN, Perkins P, Gatto G, Thanawalla A, Coltman S, Kim T, Smith T, Binder-Markey B, Zaback M, Thompson CK, Giszter S, Person A, Goulding M, Azim E, Thakor N, O'Connor D, Trimmer B, Lima SQ, Carey MR, Pandarinath C, Costa RM, Pruszynski JA, Bakir M, Sober SJ. Myomatrix arrays for high-definition muscle recording. eLife 2023; 12:RP88551. [PMID: 38113081 PMCID: PMC10730117 DOI: 10.7554/elife.88551] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023] Open
Abstract
Neurons coordinate their activity to produce an astonishing variety of motor behaviors. Our present understanding of motor control has grown rapidly thanks to new methods for recording and analyzing populations of many individual neurons over time. In contrast, current methods for recording the nervous system's actual motor output - the activation of muscle fibers by motor neurons - typically cannot detect the individual electrical events produced by muscle fibers during natural behaviors and scale poorly across species and muscle groups. Here we present a novel class of electrode devices ('Myomatrix arrays') that record muscle activity at unprecedented resolution across muscles and behaviors. High-density, flexible electrode arrays allow for stable recordings from the muscle fibers activated by a single motor neuron, called a 'motor unit,' during natural behaviors in many species, including mice, rats, primates, songbirds, frogs, and insects. This technology therefore allows the nervous system's motor output to be monitored in unprecedented detail during complex behaviors across species and muscle morphologies. We anticipate that this technology will allow rapid advances in understanding the neural control of behavior and identifying pathologies of the motor system.
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Affiliation(s)
- Bryce Chung
- Department of Biology, Emory UniversityAtlantaUnited States
| | - Muneeb Zia
- School of Electrical and Computer Engineering, Georgia Institute of TechnologyAtlantaUnited States
| | - Kyle A Thomas
- Graduate Program in Biomedical Engineering at Emory University and Georgia TechAtlantaUnited States
| | | | - Amanda Jacob
- Department of Biology, Emory UniversityAtlantaUnited States
| | - Andrea Pack
- Neuroscience Graduate Program, Emory UniversityAtlantaUnited States
| | - Matthew J Williams
- Graduate Program in Biomedical Engineering at Emory University and Georgia TechAtlantaUnited States
| | | | - Lay Heng Teng
- Department of Biology, Emory UniversityAtlantaUnited States
| | | | | | - Nicole Oey
- Department of Biology, Emory UniversityAtlantaUnited States
| | - Rhuna Gibbs
- Department of Biology, Emory UniversityAtlantaUnited States
| | - Philip Anschutz
- Graduate Program in BioEngineering, Georgia TechAtlantaUnited States
| | - Jiaao Lu
- Graduate Program in Electrical and Computer Engineering, Georgia TechAtlantaUnited States
| | - Yu Wu
- School of Electrical and Computer Engineering, Georgia Institute of TechnologyAtlantaUnited States
| | - Mehrdad Kashefi
- Department of Physiology and Pharmacology, Western UniversityLondonCanada
| | - Tomomichi Oya
- Department of Physiology and Pharmacology, Western UniversityLondonCanada
| | - Rhonda Kersten
- Department of Physiology and Pharmacology, Western UniversityLondonCanada
| | - Alice C Mosberger
- Zuckerman Mind Brain Behavior Institute at Columbia UniversityNew YorkUnited States
| | - Sean O'Connell
- Graduate Program in Biomedical Engineering at Emory University and Georgia TechAtlantaUnited States
| | - Runming Wang
- Department of Biomedical Engineering at Emory University and Georgia TechAtlantaUnited States
| | - Hugo Marques
- Champalimaud Neuroscience Programme, Champalimaud FoundationLisbonPortugal
| | - Ana Rita Mendes
- Champalimaud Neuroscience Programme, Champalimaud FoundationLisbonPortugal
| | - Constanze Lenschow
- Champalimaud Neuroscience Programme, Champalimaud FoundationLisbonPortugal
| | | | - Jeong Jun Kim
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of MedicineBaltimoreUnited States
| | - William Olson
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of MedicineBaltimoreUnited States
| | - Kiara N Quinn
- Departments of Biomedical Engineering and Neurology, Johns Hopkins School of MedicineBaltimoreUnited States
| | - Pierce Perkins
- Departments of Biomedical Engineering and Neurology, Johns Hopkins School of MedicineBaltimoreUnited States
| | - Graziana Gatto
- Salk Institute for Biological StudiesLa JollaUnited States
| | | | - Susan Coltman
- Department of Physiology and Biophysics, University of Colorado Anschutz Medical CampusAuroraUnited States
| | - Taegyo Kim
- Department of Neurobiology & Anatomy, Drexel University, College of MedicinePhiladelphiaUnited States
| | - Trevor Smith
- Department of Neurobiology & Anatomy, Drexel University, College of MedicinePhiladelphiaUnited States
| | - Ben Binder-Markey
- Department of Physical Therapy and Rehabilitation Sciences, Drexel University College of Nursing and Health ProfessionsPhiladelphiaUnited States
| | - Martin Zaback
- Department of Health and Rehabilitation Sciences, Temple UniversityPhiladelphiaUnited States
| | - Christopher K Thompson
- Department of Health and Rehabilitation Sciences, Temple UniversityPhiladelphiaUnited States
| | - Simon Giszter
- Department of Neurobiology & Anatomy, Drexel University, College of MedicinePhiladelphiaUnited States
| | - Abigail Person
- Department of Physiology and Biophysics, University of Colorado Anschutz Medical CampusAuroraUnited States
- Allen InstituteSeattleUnited States
| | | | - Eiman Azim
- Salk Institute for Biological StudiesLa JollaUnited States
| | - Nitish Thakor
- Departments of Biomedical Engineering and Neurology, Johns Hopkins School of MedicineBaltimoreUnited States
| | - Daniel O'Connor
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of MedicineBaltimoreUnited States
| | - Barry Trimmer
- Department of Biology, Tufts UniversityMedfordUnited States
| | - Susana Q Lima
- Champalimaud Neuroscience Programme, Champalimaud FoundationLisbonPortugal
| | - Megan R Carey
- Champalimaud Neuroscience Programme, Champalimaud FoundationLisbonPortugal
| | - Chethan Pandarinath
- Department of Biomedical Engineering at Emory University and Georgia TechAtlantaUnited States
| | - Rui M Costa
- Zuckerman Mind Brain Behavior Institute at Columbia UniversityNew YorkUnited States
| | | | - Muhannad Bakir
- School of Electrical and Computer Engineering, Georgia Institute of TechnologyAtlantaUnited States
| | - Samuel J Sober
- Department of Biology, Emory UniversityAtlantaUnited States
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19
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Kalyana Sundaram SD, Hossain MM, Rezki M, Ariga K, Tsujimura S. Enzyme Cascade Electrode Reactions with Nanomaterials and Their Applicability towards Biosensor and Biofuel Cells. Biosensors (Basel) 2023; 13:1018. [PMID: 38131778 PMCID: PMC10741839 DOI: 10.3390/bios13121018] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/30/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023]
Abstract
Nanomaterials, including carbon nanotubes, graphene oxide, metal-organic frameworks, metal nanoparticles, and porous carbon, play a crucial role as efficient carriers to enhance enzyme activity through substrate channeling while improving enzyme stability and reusability. However, there are significant debates surrounding aspects such as enzyme orientation, enzyme loading, retention of enzyme activity, and immobilization techniques. Consequently, these subjects have become the focus of intensive research in the realm of multi-enzyme cascade reactions. Researchers have undertaken the challenge of creating functional in vitro multi-enzyme systems, drawing inspiration from natural multi-enzyme processes within living organisms. Substantial progress has been achieved in designing multi-step reactions that harness the synthetic capabilities of various enzymes, particularly in applications such as biomarker detection (e.g., biosensors) and the development of biofuel cells. This review provides an overview of recent developments in concurrent and sequential approaches involving two or more enzymes in sequence. It delves into the intricacies of multi-enzyme cascade reactions conducted on nanostructured electrodes, addressing both the challenges encountered and the innovative solutions devised in this field.
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Affiliation(s)
| | | | | | | | - Seiya Tsujimura
- Division of Material Science, Faculty of Pure and Applied Science, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-5358, Japan; (S.d.K.S.); (M.M.H.); (M.R.); (K.A.)
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20
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Lee D, Song J, Kim J, Lee J, Son D, Shin M. Soft and Conductive Polyethylene Glycol Hydrogel Electrodes for Electrocardiogram Monitoring. Gels 2023; 9:957. [PMID: 38131943 PMCID: PMC10742586 DOI: 10.3390/gels9120957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/03/2023] [Accepted: 12/04/2023] [Indexed: 12/23/2023] Open
Abstract
The measurement of biosignals in the clinical and healthcare fields is fundamental; however, conventional electrodes pose challenges such as incomplete skin contact and skin-related issues, hindering accurate biosignal measurement. To address these challenges, conductive hydrogels, which are valuable owing to their biocompatibility and flexibility, have been widely developed and explored for electrode applications. In this study, we fabricated a conductive hydrogel by mixing polyethylene glycol diacrylate (PEGDA) with poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) polymers dissolved in deionized water, followed by light-triggered crosslinking. Notably, this study pioneered the use of a PEGDA-PEDOT:PSS hydrogel for electrocardiogram (ECG) monitoring- a type of biosignal. The resulting PEGDA-PEDOT:PSS hydrogel demonstrated remarkable conductivity while closely approximating the modulus of skin elasticity. Additionally, it demonstrated biocompatibility and a high signal-to-noise ratio in the waveforms. This study confirmed the exceptional suitability of the PEGDA-PEDOT:PSS hydrogel for accurate biosignal measurements with potential applications in various wearable devices designed for biosignal monitoring.
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Affiliation(s)
- Dongik Lee
- Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; (D.L.); (J.K.); (J.L.)
| | - Jihyang Song
- Department of Artificial Intelligence System Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea;
| | - Jungwoo Kim
- Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; (D.L.); (J.K.); (J.L.)
| | - Jaebeom Lee
- Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; (D.L.); (J.K.); (J.L.)
| | - Donghee Son
- Department of Artificial Intelligence System Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea;
- Department of Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Mikyung Shin
- Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; (D.L.); (J.K.); (J.L.)
- Department of Biomedical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
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21
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Qu X, Xie R, Zhou Z, Zhang T, Guan M, Chen S, Wang H. Highly Sensitive Capacitive Fiber Pressure Sensors Enabled by Electrode and Dielectric Layer Regulation. ACS Appl Mater Interfaces 2023; 15:54966-54976. [PMID: 37967359 DOI: 10.1021/acsami.3c13714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Capacitive pressure sensors play an important role in the field of flexible electronics. Despite significant advances in two-dimensional (2D) soft pressure sensors, one-dimensional (1D) fiber electronics are still struggling. Due to differences in structure, the theoretical research of 2D sensors has difficulty guiding the design of 1D sensors. The multiple response factors of 1D sensors and the capacitive response mechanism have not been explored. Fiber sensors urgently need a tailor-made theoretical research and development path. In this regard, we established a fiber pressure-sensing platform using a coaxial wet spinning process. Aiming at the two problems of the soft electrode modulus and dielectric layer thickness, the conclusions are drawn from three aspects: model analysis, experimental verification, and formula derivation. It makes up some theoretical blanks of capacitive fiber pressure sensors. Through the self-regulation of these two factors without a complex structural design, the sensitivity can be significantly improved. This provides a great reference for the design and development of fiber pressure sensors. Besides, taking advantage of the scalability and easy integration of 1D electronics, multipoint sensors prepared by fibers have verified their application potential in health monitoring, human-machine interface, and motion behavior analysis.
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Affiliation(s)
- Xiangyang Qu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Ruimin Xie
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Zhou Zhou
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Tao Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Mengyao Guan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Shiyan Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
| | - Huaping Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR China
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22
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Orue Mendizabal A, Cheddadi M, Tron A, Beutl A, López-Aranguren P. Understanding Interfaces at the Positive and Negative Electrodes on Sulfide-Based Solid-State Batteries. ACS Appl Energy Mater 2023; 6:11030-11042. [PMID: 38020742 PMCID: PMC10646897 DOI: 10.1021/acsaem.3c01894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 10/12/2023] [Accepted: 10/12/2023] [Indexed: 12/01/2023]
Abstract
Despite the high ionic conductivity and attractive mechanical properties of sulfide-based solid-state batteries, this chemistry still faces key challenges to encompass fast rate and long cycling performance, mainly arising from dynamic and complex solid-solid interfaces. This work provides a comprehensive assessment of the cell performance-determining factors ascribed to the multiple sources of impedance from the individual processes taking place at the composite cathode with high-voltage LiNi0.6Mn0.2Co0.2O2, the sulfide argyrodite Li6PS5Cl separator, and the Li metal anode. From a multiconfigurational approach and an advanced deconvolution of electrochemical impedance signals into distribution of relaxation times, we disentangle intricate underlying interfacial processes taking place at the battery components that play a major role on the overall performance. For the Li metal solid-state batteries, the cycling performance is highly sensitive to the chemomechanical properties of the cathode active material, formation of the SEI, and processes ascribed to Li diffusion in the cathode composite and in the space-charge layer. The outcomes of this work aim to facilitate the design of sulfide solid-state batteries and provide methodological inputs for battery aging assessment.
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Affiliation(s)
- Ander Orue Mendizabal
- Center
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Parque
Tecnológico de Álava, Albert Einstein, 48, 01510 Vitoria-Gasteiz, Spain
| | - Manar Cheddadi
- Center
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Parque
Tecnológico de Álava, Albert Einstein, 48, 01510 Vitoria-Gasteiz, Spain
| | - Artur Tron
- Battery
Technologies, Center for Low-Emission Transport, AIT Austrian Institute of Technology GmbH, Giefinggasse 2, 1210 Vienna, Austria
| | - Alexander Beutl
- Battery
Technologies, Center for Low-Emission Transport, AIT Austrian Institute of Technology GmbH, Giefinggasse 2, 1210 Vienna, Austria
| | - Pedro López-Aranguren
- Center
for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Parque
Tecnológico de Álava, Albert Einstein, 48, 01510 Vitoria-Gasteiz, Spain
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23
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Lim DW, Yoon TS, Han KH, Sajjad S, Shin HS, Kang S. Improved Separation in Horizontal Protein SDS-PAGE with Double-Deck Flat Electrodes and a Field Inversion Gel Electrophoresis Module. Methods Protoc 2023; 6:106. [PMID: 37987353 PMCID: PMC10660703 DOI: 10.3390/mps6060106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 10/20/2023] [Accepted: 10/26/2023] [Indexed: 11/22/2023] Open
Abstract
The horizontal flatbed electrophoresis method is employed to separate protein samples, providing greater flexibility for various electrophoretic applications and easier sample loading compared to its vertical counterpart. In the currently available equipment setup, cathode and anode electrodes are positioned on top of a gel at each end. Since an electric field enters the gel from the top, its strength gradually weakens from the top to the bottom of the gel. When examining the interior of gels following electrophoretic separation, the uneven electric field causes the protein bands to lie down forward in the direction of migration, leading to an increase in bandwidth. This issue has remained unaddressed for several decades. To address this problem, new clamp-shaped and double-deck electrodes were developed to apply an electric field simultaneously from both the top and bottom of the gel. Both of these new electrodes facilitated the formation of perpendicular protein band shapes and enhanced resolution at a comparable level. Due to their ease of use, double-deck electrodes are recommended. By combining these new electrodes with the field inversion gel electrophoresis (FIGE) technique, the protein bands could be focused and aligned nearly vertically, resulting in the highest level of electrophoretic resolution. Our electrodes are compatible with polyacrylamide gels of varying sizes, buffer systems, and sample well formats. They can be easily manufactured and seamlessly integrated into existing laboratory instruments for practical use.
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Affiliation(s)
- Dong Woo Lim
- T-MAC Co., Ltd., Yuseong-gu, Daejeon 34141, Republic of Korea; (D.W.L.); (H.-S.S.)
| | - Tae-Sung Yoon
- Critical Diseases Diagnostics Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yuseong-gu, Daejeon 34141, Republic of Korea; (T.-S.Y.); (S.S.)
| | - Kyung Ho Han
- Department of Biological Sciences and Biotechnology, Hannam University, Yuseong-gu, Daejeon 34054, Republic of Korea;
| | - Saba Sajjad
- Critical Diseases Diagnostics Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yuseong-gu, Daejeon 34141, Republic of Korea; (T.-S.Y.); (S.S.)
| | - Heung-Seon Shin
- T-MAC Co., Ltd., Yuseong-gu, Daejeon 34141, Republic of Korea; (D.W.L.); (H.-S.S.)
| | - Sunghyun Kang
- T-MAC Co., Ltd., Yuseong-gu, Daejeon 34141, Republic of Korea; (D.W.L.); (H.-S.S.)
- Critical Diseases Diagnostics Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Yuseong-gu, Daejeon 34141, Republic of Korea; (T.-S.Y.); (S.S.)
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24
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Freund BE, Sherman WJ, Sabsevitz DS, Middlebrooks EH, Feyissa AM, Garcia DM, Grewal SS, Chaichana KL, Quinones-Hinojosa A, Tatum WO. Can we improve electrocorticography using a circular grid array in brain tumor surgery? Biomed Phys Eng Express 2023; 9:065027. [PMID: 37871586 DOI: 10.1088/2057-1976/ad05dd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 10/23/2023] [Indexed: 10/25/2023]
Abstract
Intraoperative electrocorticography (iECoG) is used as an adjunct to localize the epileptogenic zone during surgical resection of brain tumors in patients with focal epilepsies. It also enables monitoring of after-discharges and seizures with EEG during functional brain mapping with electrical stimulation. When seizures or after-discharges are present, they complicate accurate interpretation of the mapping strategy to outline the brain's eloquent function and can affect the surgical procedure. Recurrent seizures during surgery requires urgent treatment and, when occurring during awake craniotomy, often leads to premature termination of brain mapping due to post-ictal confusion or sedation from acute rescue therapy. There are mixed results in studies on efficacy with iECoG in patients with epilepsy and brain tumors influencing survival and functional outcomes following surgery. Commercially available electrode arrays have inherent limitations. These could be improved with customization potentially leading to greater precision in safe and maximal resection of brain tumors. Few studies have assessed customized electrode grid designs as an alternative to commercially available products. Higher density electrode grids with intercontact distances less than 1 cm improve spatial delineation of electrophysiologic sources, including epileptiform activity, electrographic seizures, and afterdischarges on iECoG during functional brain mapping. In response to the shortcomings of current iECoG grid technologies, we designed and developed a novel higher-density hollow circular electrode grid array. The 360-degree iECoG monitoring capability allows continuous EEG recording during surgical intervention through the aperture with and without electrical stimulation mapping. Compared with linear strip electrodes that are commonly used for iECoG during surgery, the circular grid demonstrates significant benefits in brain tumor surgery. This includes quicker recovery of post-operative motor deficits (2.4 days versus 9 days, p = 0.05), more extensive tumor resection (92.0% versus 77.6%, p = 0.003), lesser reduction in Karnofsky Performance scale postoperatively (-2 versus -11.6, p = 0.007), and more sensitivity to recording afterdischarges. In this narrative review, we discuss the advantages and disadvantages of commercially available recording devices in the operating room and focus on the usefulness of the higher-density circular grid.
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Affiliation(s)
- Brin E Freund
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - Wendy J Sherman
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - David S Sabsevitz
- Department of Psychiatry, Division of Neuropsychology, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - Erik H Middlebrooks
- Department of Radiology, Division of Neuroradiology, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
- Department of Neurosurgery, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - Anteneh M Feyissa
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - Diogo Moniz Garcia
- Department of Neurosurgery, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - Sanjeet S Grewal
- Department of Neurosurgery, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - Kaisorn L Chaichana
- Department of Neurosurgery, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - Alfredo Quinones-Hinojosa
- Department of Neurosurgery, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
| | - William O Tatum
- Department of Neurology, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, FL, United States of America
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25
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Li L, Jia S, Cheng Z, Zhang C. Recent Research Progress into Zinc Ion Battery Solid-Electrolyte Interfaces. ChemSusChem 2023; 16:e202300632. [PMID: 37312016 DOI: 10.1002/cssc.202300632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/07/2023] [Accepted: 06/12/2023] [Indexed: 06/15/2023]
Abstract
Aqueous zinc ion batteries (ZIBs) are prospective next-generation energy storage device candidates owing to resource abundance, affordability, eco-friendliness, and safety. The solid-electrolyte interface (SEI) produced in a ZIB by electrolyte/electrode interactions significantly impacts battery performance. The SEI is known to promote dendrite growth, determine the electrochemical stability window, passivate zinc-metal-anodic corrosion, and mutate the electrolyte. Accordingly, the SEI is closely related to the overall property of a ZIB device. This review provides an overview of the impact of SEIs on ZIB performance recently and provides an SEI design strategy based on the formation mechanism, type, and characteristics of the SEI. Finally, future investigational directions for SEIs in ZIBs are expected to lead to a deep understanding of the SEI, enhance ZIB performance, and facilitate their extensive implementation.
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Affiliation(s)
- Le Li
- Shaanxi Key Laboratory of Industrial Automation, Manufacturing and Testing of Landing Gear and Aircraft Structural Parts Shaanxi University Engineering Research Center, School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong, 723001, P. R. China
| | - Shaofeng Jia
- Shaanxi Key Laboratory of Industrial Automation, Manufacturing and Testing of Landing Gear and Aircraft Structural Parts Shaanxi University Engineering Research Center, School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong, 723001, P. R. China
| | - Zhiyi Cheng
- Shaanxi Key Laboratory of Industrial Automation, Manufacturing and Testing of Landing Gear and Aircraft Structural Parts Shaanxi University Engineering Research Center, School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong, 723001, P. R. China
| | - Changming Zhang
- Shaanxi Key Laboratory of Industrial Automation, Manufacturing and Testing of Landing Gear and Aircraft Structural Parts Shaanxi University Engineering Research Center, School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong, 723001, P. R. China
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26
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Rehman WU, Farooq U, Yousaf MZ, Altalbe A. Bismuth-Nanoparticles-Embedded Porous Carbon Derived from Seed Husks as High-Performance for Anode Energy Electrode. Materials (Basel) 2023; 16:6628. [PMID: 37895610 PMCID: PMC10608430 DOI: 10.3390/ma16206628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/08/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023]
Abstract
In energy application technology, the anode part of the electrode is typically composed of carbon-coated materials that exhibit excellent electrochemical performance. The carbon-coated electrodes facilitate electrochemical reactions involving the fuel and the oxidant. Energy electrodes are used in stationary power plants to generate electricity for the grid. These large-scale installations are known as distributed generation systems and contribute to grid stability and reliability. Understanding the practical applications of energy materials remains a significant hurdle in the way of commercialization. An anode electrode has one key limitation, specifically with alloy-type candidates, as they tend to exhibit rapid capacity degradation during cycling due to volume expansion. Herein, biomass-derived carbon from sunflowers (seeds husks) via pyrolysis and then bismuth nanoparticles are treated with carbon via a simple wet-chemical method. The electrode Bi@C offers several structural advantages, such as high capacity, good cycling stability, and exceptional capability at the current rate of 500 mA g-1, delivering a capacity of 731.8 mAh g-1 for 200 cycles. The biomass-derived carbon coating protects the bismuth nanoparticles and contributes to enhanced electronic conductivity. Additionally, we anticipate the use of low-cost biomass with hybrid composition has the potential to foster environment-friendly practices in the development of next-generation advanced fuel cell technology.
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Affiliation(s)
- Wasif ur Rehman
- Hubei Key Laboratory of Energy Storage and Power Battery, School of Mathematics, Physics and Opto-Electronic Engineering, Hubei University of Automotive Technology, Shiyan 442002, China;
| | - Umar Farooq
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321017, China
| | - Muhammad Zain Yousaf
- School of Electrical and Information Engineering, Hubei University of Automotive Technology, Shiyan 442002, China;
| | - Ali Altalbe
- Department of Computer Science, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
- Faculty of Computing and Information Technology, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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27
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Huo B, Kuang F, Guo CY. Design and Optimization Strategies for Flexible Quasi-Solid-State Thermo-Electrochemical Cells. Materials (Basel) 2023; 16:6574. [PMID: 37834712 PMCID: PMC10573773 DOI: 10.3390/ma16196574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/29/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023]
Abstract
Currently, efficient utilization of low-grade thermal energy is a great challenge. Thermoelectricity is an extremely promising method of generating electrical energy from temperature differences. As a green energy conversion technology, thermo-electrochemical cells (TECs) have attracted much attention in recent years for their ability to convert thermal energy directly into electricity with high thermal power. Within TECs, anions and cations gain and lose electrons, respectively, at the electrodes, using the potential difference between the hot and cold terminals of the electrodes by redox couples. Additionally, the anions and cations therein are constantly circulating and mobile via concentration diffusion and thermal diffusion, providing an uninterrupted supply of power to the exterior. This review article focuses mainly on the operation of TECs and recent advances in redox couples, electrolytes, and electrodes. The outlook for optimization strategies regarding TECs is also outlined in this paper.
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Affiliation(s)
- Bingchen Huo
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
- High & New Technology Research Center, Henan Academy of Sciences, Zhengzhou 450003, China
| | - Fengxia Kuang
- Guangzhou Health Science College, Guangzhou 510925, China;
| | - Cun-Yue Guo
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
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28
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Gärtner L, Backus BC, Le Goff N, Morgenstern A, Lenarz T, Büchner A. Cochlear Implant Stimulation Parameters Play a Key Role in Reducing Facial Nerve Stimulation. J Clin Med 2023; 12:6194. [PMID: 37834838 PMCID: PMC10573649 DOI: 10.3390/jcm12196194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/18/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023] Open
Abstract
A percentage (i.e., 5.6%) of Cochlear Implant (CI) users reportedly experience unwanted facial nerve stimulation (FNS). For some, the effort to control this problem results in changing stimulation parameters, thereby reducing their hearing performance. For others, the only viable solution is to deactivate the CI completely. A growing body of evidence in the form of case reports suggests that undesired FNS can be effectively addressed through re-implantation with an Oticon Medical (OM) Neuro-Zti implant. However, the root of this benefit is still unknown: is it due to surgical adjustments, such as varied array geometries and/or positioning, or does it stem from differences in stimulation parameters and/or grounding? The OM device exhibits two distinct features: (1) unique stimulation parameters, including anodic leading pulses and loudness controlled by pulse duration-not current-resulting in lower overall current amplitudes; and (2) unconventional grounding, including both passive (capacitive) discharge, which creates a pseudo-monophasic pulse shape, and a 'distributed-all-polar' (DAP) grounding scheme, which is thought to reduce current spread. Unfortunately, case reports alone cannot distinguish between surgical factors and these implant-related ones. In this paper, we present a novel follow-up study of two CI subjects who previously experienced FNS before re-implantation with Neuro-Zti implants. We used the Oticon Medical Research Platform (OMRP) to stimulate a single electrode in each subject in two ways: (1) with traditional monopolar biphasic cathodic-first pulses, and (2) with distinct OM clinical stimulation. We progressively increased the stimulation intensity until FNS occurred or the sound became excessively loud. Non-auditory/FNS sensations were observed with the traditional stimulation but not with the OM clinical one. This provides the first direct evidence demonstrating that stimulation parameters and/or grounding-not surgical factors-play a key role in mitigating FNS.
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Affiliation(s)
- Lutz Gärtner
- Department of Otolaryngology, Hannover Medical School, 30625 Hannover, Germany; (L.G.); (A.M.); (T.L.)
| | | | | | - Anika Morgenstern
- Department of Otolaryngology, Hannover Medical School, 30625 Hannover, Germany; (L.G.); (A.M.); (T.L.)
| | - Thomas Lenarz
- Department of Otolaryngology, Hannover Medical School, 30625 Hannover, Germany; (L.G.); (A.M.); (T.L.)
- Cluster of Excellence “Hearing4all”, 30625 Hannover, Germany
| | - Andreas Büchner
- Department of Otolaryngology, Hannover Medical School, 30625 Hannover, Germany; (L.G.); (A.M.); (T.L.)
- Cluster of Excellence “Hearing4all”, 30625 Hannover, Germany
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29
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Oikawa T, Nomura K, Hara T, Koida K. A Fine-Scale and Minimally Invasive Marking Method for Use with Conventional Tungsten Micro electrodes. eNeuro 2023; 10:ENEURO.0141-23.2023. [PMID: 37696665 PMCID: PMC10521347 DOI: 10.1523/eneuro.0141-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 08/24/2023] [Accepted: 09/04/2023] [Indexed: 09/13/2023] Open
Abstract
In neurophysiology, achieving precise correlation between physiological responses and anatomic structures is a significant challenge. Therefore, the accuracy of the electrode marking method is crucial. In this study, we describe a tungsten-deposition method, in which tungsten oxide is generated by applying biphasic current pulses to conventional tungsten electrodes. The electrical current used was 40-50 μA, which is similar to that used in electrical microstimulation experiments. The size of the markings ranged from 10 to 100 μm, corresponding to the size of the electrode tip, which is smaller than that of existing marking methods. Despite the small size of the markings, detection is easy as the marking appears in bright red under dark-field observation after Nissl staining. This marking technique resulted in low tissue damage and was maintained in vivo for at least two years. The feasibility of this method was tested in mouse and macaque brains.
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Affiliation(s)
- Tatsuya Oikawa
- Department of Computer Engineering, Toyohashi University of Technology, Aichi 441-8580, Japan
| | - Kento Nomura
- Department of Computer Engineering, Toyohashi University of Technology, Aichi 441-8580, Japan
| | - Toshimitsu Hara
- Department of Computer Engineering, Toyohashi University of Technology, Aichi 441-8580, Japan
| | - Kowa Koida
- Department of Computer Engineering, Toyohashi University of Technology, Aichi 441-8580, Japan
- Institute for Research on Next-generation Semiconductor and Sensing Science, Toyohashi University of Technology, Aichi 441-8580, Japan
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30
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Hogenes AM, Slump CH, te Riet o. g. Scholten GA, Stommel MWJ, Fütterer JJ, Verdaasdonk RM. The Effect of Partial Electrical Insulation of the Tip and Active Needle Length of Monopolar Irreversible Electroporation Electrodes on the Electric Field Line Pattern and Temperature Gradient to Improve Treatment Control. Cancers (Basel) 2023; 15:4280. [PMID: 37686556 PMCID: PMC10486353 DOI: 10.3390/cancers15174280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 08/10/2023] [Accepted: 08/21/2023] [Indexed: 09/10/2023] Open
Abstract
Unintentional local temperature effects can occur during irreversible electroporation (IRE) treatment, especially near the electrodes, and most frequently near the tip. Partial electrical insulation of the IRE electrodes could possibly control these temperature effects. This study investigated and visualized the effect of partial electrical insulation applied to the IRE electrodes on the electric field line pattern and temperature gradient. Six designs of (partial) electrical insulation of the electrode tip and/or active needle length (ANL) of the original monopolar 19G IRE electrodes were investigated. A semolina in castor oil model was used to visualize the electric field line pattern in a high-voltage static electric field. An optical method to visualize a change in temperature gradient (color Schlieren) was used to image the temperature development in a polyacrylamide gel. Computational models were used to support the experimental findings. Around the electrode tip, the highest electric field line density and temperature gradient were present. The more insulation was applied to the electrodes, the higher the resistance. Tip and ANL insulation together reduced the active area of and around the electrodes, resulting in a visually enlarged area that showed a change in temperature gradient. Electrically insulating the electrode tip together with an adjustment in IRE parameter settings could potentially reduce the uncontrollable influence of the tip and may improve the predictability of the current pathway development.
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Affiliation(s)
- Annemiek M. Hogenes
- Department of Medical Imaging, Radboud University Medical Center, P.O. Box 9101 (766), 6500 HB Nijmegen, The Netherlands
| | - Cornelis H. Slump
- Department of Robotics and Mechatronics, University of Twente, 7522 NB Enschede, The Netherlands
| | | | - Martijn W. J. Stommel
- Department of Surgery, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Jurgen J. Fütterer
- Department of Medical Imaging, Radboud University Medical Center, P.O. Box 9101 (766), 6500 HB Nijmegen, The Netherlands
- Department of Robotics and Mechatronics, University of Twente, 7522 NB Enschede, The Netherlands
| | - Rudolf M. Verdaasdonk
- Department of Health Technology Implementation, TechMed Center, University of Twente, 7522 NB Enschede, The Netherlands
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31
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Lefdhil C, Polat S, Zengin H. Synthesis of Zinc Oxide Nanorods from Zinc Borate Precursor and Characterization of Supercapacitor Properties. Nanomaterials (Basel) 2023; 13:2423. [PMID: 37686931 PMCID: PMC10490104 DOI: 10.3390/nano13172423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/16/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023]
Abstract
The synthesis of zinc oxide (ZnO) was accomplished from zinc borate (Zn3B2O6) minerals to be used as electrodes in supercapacitor applications. The concentrations of obtained zinc (Zn) metal after treatment with hydrochloric acid (HCl) were determined by atomic absorption spectroscopy (AAS). Direct synthesis of ZnO on a nickel (Ni) foam surface was conducted by employing the hydrothermal technique using a solution with the highest Zn content. The results showed the successful synthesis of ZnO nanorods on the surface of Ni foam with an average wall size of approximately 358 nm. Cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) measurements revealed that the synthesized electrode exhibited battery-type charge storage characteristics, reaching a maximum specific capacitance of approximately 867 mF·cm-² at a current density of 2 mA·cm-². Additionally, the energy and power densities of the electrode at a current density of 2 mA·cm-² were calculated as 19.3 mWh·cm-² and 200 mW·cm-², respectively. These results exhibited promising performance of the single-component electrode, outperforming the existing counterparts reported in the literature.
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Affiliation(s)
- Chikh Lefdhil
- Material Research and Development Centre, Karabuk University, 78050 Karabük, Turkey
- Nano Energy Laboratory, Karabuk University, 78050 Karabük, Turkey
- Metallurgy and Materials Engineering, Karabuk University, 78050 Karabük, Turkey
| | - Safa Polat
- Material Research and Development Centre, Karabuk University, 78050 Karabük, Turkey
- Nano Energy Laboratory, Karabuk University, 78050 Karabük, Turkey
- Metallurgy and Materials Engineering, Karabuk University, 78050 Karabük, Turkey
| | - Hüseyin Zengin
- Institute of Chemical Technology of Inorganic Materials (TIM), Johannes Kepler University, 4040 Linz, Austria
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32
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Kim D, Jeon J, Park JD, Sun XG, Gao X, Lee HN, MacManus-Driscoll JL, Kwon DH, Lee S. Stable Supercapacity of Binder-Free TiO 2(B) Epitaxial Electrodes for All-Solid-State Nanobatteries. Nano Lett 2023; 23:6815-6822. [PMID: 37499099 DOI: 10.1021/acs.nanolett.3c00596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Owing to its pseudocapacitive, unidimensional, rapid ion channels, TiO2(B) is a promising material for application to battery electrodes. In this study, we align these channels by epitaxially growing TiO2(B) films with the assistance of an isostructural VO2(B) template layer. In a liquid electrolyte, binder-free TiO2(B) epitaxial electrodes exhibit a supercapacity near the theoretical value of 335 mA h g-1 and an excellent charge-discharge reproducibility for ≥200 cycles, which outperform those of other TiO2(B) nanostructures. For the all-solid-state configuration employing the LiPON solid electrolyte, excellent stability persists. Our findings suggest excellent potential for miniaturizing all-solid-state nanobatteries in self-powered integrated circuits.
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Affiliation(s)
- Dongha Kim
- Department of Physics and Chemistry and Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea
| | - Jingyeong Jeon
- Department of Physics and Chemistry and Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea
| | - Joon Deok Park
- Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Xiao-Guang Sun
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Xiang Gao
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Ho Nyung Lee
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Judith L MacManus-Driscoll
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - Deok-Hwang Kwon
- Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Shinbuhm Lee
- Department of Physics and Chemistry and Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea
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Ibrahim Zamkoye I, Lucas B, Vedraine S. Synergistic Effects of Localized Surface Plasmon Resonance, Surface Plasmon Polariton, and Waveguide Plasmonic Resonance on the Same Material: A Promising Hypothesis to Enhance Organic Solar Cell Efficiency. Nanomaterials (Basel) 2023; 13:2209. [PMID: 37570526 PMCID: PMC10421476 DOI: 10.3390/nano13152209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 08/13/2023]
Abstract
This work explores the utilization of plasmonic resonance (PR) in silver nanowires to enhance the performance of organic solar cells. We investigate the simultaneous effect of localized surface plasmon resonance (LSPR), surface plasmon polariton (SPP), and waveguide plasmonic mode on silver nanowires, which have not been thoroughly explored before. By employing finite-difference time-domain (FDTD) simulations, we analyze the plasmonic resonance behavior of a ZnO/Silver nanowires/ZnO (ZAZ) electrode structure. Our investigations demonstrate the dominance of LSPR, leading to intense electric fields inside the nanowire and their propagation into the surrounding medium. Additionally, we observe the synergistic effects of SPP and waveguide plasmonic mode, contributing to enhanced light absorption within the active layer of the organic solar cell. This leads to an improvement in photovoltaic performance, as demonstrated by our previous work, showing an approximate 20% increase in photocurrent and overall power conversion efficiency of the organic solar cell. The incorporation of metallic nanostructures exhibiting these multiple plasmonic modes opens up new opportunities for improving light absorption and overall device efficiency. Our study highlights the potential of these combined plasmonic effects for the design and optimization of organic solar cells.
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Affiliation(s)
- Issoufou Ibrahim Zamkoye
- University of Limoges, Centre National de la Recherche Scientifique, XLIM, UMR 7252, F-87000 Limoges, France;
| | | | - Sylvain Vedraine
- University of Limoges, Centre National de la Recherche Scientifique, XLIM, UMR 7252, F-87000 Limoges, France;
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VILASÓ-CADRE JE, BENÍTEZ-FERNÁNDEZ D, LÓPEZ-ÁLVAREZ IA, TOVAR-VÁZQUEZ FY, ARADA-PÉREZ MA, REYES-DOMÍNGUEZ IA. Acid-base potentiometric titration using a stainless steel electrode without oxidative treatment. Turk J Chem 2023; 47:801-813. [PMID: 38174066 PMCID: PMC10760551 DOI: 10.55730/1300-0527.3580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 08/25/2023] [Accepted: 07/19/2023] [Indexed: 01/05/2024] Open
Abstract
An AISI 304 stainless steel laminar electrode without oxidative treatment was investigated for the potentiometric titration of hydrochloric acid with sodium hydroxide. The proposed electrode was obtained from metalworking cuttings. Scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray fluorescence spectroscopy and X-ray diffraction were used to study the surface morphology and chemical composition of the electrode. The electrode showed a sensitivity of 59.18 ± 0.37 mV/pH, which was reproducible under intermediate conditions. Potentiometric titration showed a curve with deviations from pH 9.5 with respect to the glass electrode. However, this did not affect the quantification as the jumps of the curves coincided. The endpoint was 9.25 mL for both electrodes and the hydrochloric acid concentration was 0.0845 mol/L, with a deviation of 0.0004 mol/L from the standard concentration of 0.0841 mol/L. The nonartificially oxidised electrode did not show any crystalline oxide phases, whereas after oxidation it showed semicrystalline phases of iron and chromium oxides and increased the crystallinity of the steel. Despite the low content of surface oxides, stainless steel electrodes can give a Nernstian response to pH, depending on the surface characteristics of the material. This leads to the need to calibrate any electrode prior to oxidative treatment to rule out a Nernstian response without surface modification.
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Affiliation(s)
- Javier E. VILASÓ-CADRE
- Institute of Metallurgy, Autonomous University of San Luis Potosi, San Luis Potosi,
Mexico
| | - Daniel BENÍTEZ-FERNÁNDEZ
- Department of Chemistry, Faculty of Natural and Exact Sciences, University of Oriente, Santiago of Cuba,
Cuba
| | - Ilse A. LÓPEZ-ÁLVAREZ
- Institute of Metallurgy, Autonomous University of San Luis Potosi, San Luis Potosi,
Mexico
| | | | - María A. ARADA-PÉREZ
- Department of Chemistry, Faculty of Natural and Exact Sciences, University of Oriente, Santiago of Cuba,
Cuba
| | - Iván A. REYES-DOMÍNGUEZ
- Institute of Metallurgy, Autonomous University of San Luis Potosi, San Luis Potosi,
Mexico
- National Council of Science and Technology (CONACYT), Mexico City,
Mexico
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35
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Kim SH, Kang JM, Park Y, Jeong S, Na Y, Jung HD, An J, Kim HS, Lee SS, Park JH. Self-Expandable Electrode Based on Chemically Polished Nickel-Titanium Alloy Wire for Treating Endoluminal Tumors Using Bipolar Irreversible Electroporation. ACS Appl Mater Interfaces 2023. [PMID: 37452740 DOI: 10.1021/acsami.3c04703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
The application of irreversible electroporation (IRE) to endoluminal organs is being investigated; however, the current preclinical evidence and optimized electrodes are insufficient for clinical translation. Here, a novel self-expandable electrode (SE) made of chemically polished nickel-titanium (Ni-Ti) alloy wire for endoluminal IRE is developed in this study. Chemically polished heat-treated Ni-Ti alloy wires demonstrate increased electrical conductivity, reduced carbon and oxygen levels, and good mechanical and self-expanding properties. Bipolar IRE using chemically polished Ni-Ti wires successfully induces cancer cell death. IRE-treated potato tissue shows irreversibly and reversibly electroporated areas containing dead cells in an electrical strength-dependent manner. In vivo study using an optimized electric field strength demonstrates that endobiliary IRE using the SE evenly induces well-distributed mucosal injuries in the common bile duct (CBD) with the overexpression of the TUNEL, HSP70, and inflammatory cells without ductal perforation or stricture formation. This study demonstrates the basic concept of the endobiliary IRE procedure, which is technically feasible and safe in a porcine CBD as a novel therapeutic strategy for malignant biliary obstruction. The SE is a promising electrical energy delivery platform for effectively treating endoluminal organs.
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Affiliation(s)
- Song Hee Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Jeon Min Kang
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Yubeen Park
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Seung Jeong
- Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul 11 08826, Republic of Korea
| | - Yuhyun Na
- Department of Biomedical-Chemical Engineering, The Catholic University of Korea, Bucheon 14662, Republic of Korea
- Department of Biotechnology, The Catholic University of Korea, Bucheon 14662, Republic of Korea
| | - Hyun-Do Jung
- Department of Biomedical-Chemical Engineering, The Catholic University of Korea, Bucheon 14662, Republic of Korea
- Department of Biotechnology, The Catholic University of Korea, Bucheon 14662, Republic of Korea
| | - Jinsu An
- Department of Biomedical Engineering, School of ICT Convergence Engineering, College of Science & Technology, Konkuk University, Chungju-si 22478, Republic of Korea
| | - Hyung-Sik Kim
- Department of Mechatronics Engineering, School of ICT Convergence Engineering, College of Science & Technology, Konkuk University, Chungju-si 22478, Republic of Korea
| | - Sang Soo Lee
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - Jung-Hoon Park
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
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36
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Rani B, Bubanja V, Jindal VK. Enhanced quantum capacitance of MX4 (M=Fe, Co, Ni, Cu, and Zn; X=N, P) moieties embedded graphene: A DFT study. J Phys Condens Matter 2023. [PMID: 37419126 DOI: 10.1088/1361-648x/ace578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/09/2023]
Abstract

In this work, density functional theory calculations are performed to study the impact of embedding transition metal-(N/P)4 moieties in graphene on its geometric structure, electronic properties, and quantum capacitance. Enhancement of quantum capacitance of transition metal doped nitrogen/phosphorus pyridinic graphenes is observed, which is directly related to the availability of states near the Fermi level. The findings show that electronic properties and hence quantum capacitance of graphene can be tuned by varying transition metal dopants and/or their coordination environment. Modified graphenes can suitably be chosen as positive or negative electrodes of asymmetric supercapacitors depending upon the values of quantum capacitance and stored charges. Furthermore, quantum capacitance can be enhanced by widening the working voltage window. The results can serve as guidelines for the design of graphene-based electrodes in supercapacitor applications.
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Affiliation(s)
- Babita Rani
- Punjabi University, Physics Department, Patiala, Punjab, 147002, INDIA
| | - Vladimir Bubanja
- Measurement Standards Laboratory of New Zealand, Lower Hutt, 5040, Wellington, New Zealand., Wellington, 5040, NEW ZEALAND
| | - V K Jindal
- Panjab University, Physics Department, Chandigarh, Punjab, 160014, INDIA
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37
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Osinkin D, Bogdanovich N. Sintering Aid Strategy for Promoting Oxygen Reduction Reaction on High-Performance Double-Layer LaNi 0.6Fe 0.4O 3-δ Composite Electrode for Devices Based on Solid-State Membranes. Membranes (Basel) 2023; 13:603. [PMID: 37367807 DOI: 10.3390/membranes13060603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/10/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023]
Abstract
Strontium and cobalt-free LaNi0.6Fe0.4O3-δ is considered one of the most promising electrodes for solid-state electrochemical devices. LaNi0.6Fe0.4O3-δ has high electrical conductivity, a suitable thermal expansion coefficient, satisfactory tolerance to chromium poisoning, and chemical compatibility with zirconia-based electrolytes. The disadvantage of LaNi0.6Fe0.4O3-δ is its low oxygen-ion conductivity. In order to increase the oxygen-ion conductivity, a complex oxide based on a doped ceria is added to the LaNi0.6Fe0.4O3-δ. However, this leads to a decrease in the conductivity of the electrode. In this case, a two-layer electrode with a functional composite layer and a collector layer with the addition of sintering additives should be used. In this study, the effect of sintering additives (Bi0.75Y0.25O2-δ and CuO) in the collector layer on the performance of LaNi0.6Fe0.4O3-δ-based highly active electrodes in contact with the most common solid-state membranes (Zr0.84Sc0.16O2-δ, Ce0.8Sm0.2O2-δ, La0.85Sr0.15Ga0.85Mg0.15O3-δ, La10(SiO4)6O3-δ, and BaCe0.89Gd0.1Cu0.01O3-δ) was investigated. It was shown that LaNi0.6Fe0.4O3-δ has good chemical compatibility with the abovementioned membranes. The best electrochemical activity (polarization resistance about 0.02 Ohm cm2 at 800 °C) was obtained for the electrode with 5 wt.% Bi0.75Y0.25O1.5 and 2 wt.% CuO in the collector layer.
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Affiliation(s)
- Denis Osinkin
- Laboratory of Kinetics, Institute of High-Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg 620066, Russia
- Department of Life Safety, Institute of Fundamental Education, Ural Federal University, Yekaterinburg 620002, Russia
| | - Nina Bogdanovich
- Laboratory of Kinetics, Institute of High-Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Yekaterinburg 620066, Russia
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38
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Simonenko TL, Simonenko NP, Gorobtsov PY, Simonenko EP, Kuznetsov NT. Microplotter Printing of a Miniature Flexible Supercapacitor Electrode Based on Hierarchically Organized NiCo 2O 4 Nanostructures. Materials (Basel) 2023; 16:4202. [PMID: 37374386 DOI: 10.3390/ma16124202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/01/2023] [Accepted: 06/04/2023] [Indexed: 06/29/2023]
Abstract
The hydrothermal synthesis of a nanosized NiCo2O4 oxide with several levels of hierarchical self-organization was studied. Using X-ray diffraction analysis (XRD) and Fourier-transform infrared (FTIR) spectroscopy, it was determined that under the selected synthesis conditions, a nickel-cobalt carbonate hydroxide hydrate of the composition M(CO3)0.5(OH)·0.11H2O (where M-Ni2+ and Co2+) is formed as a semi-product. The conditions of semi-product transformation into the target oxide were determined by simultaneous thermal analysis. It was found by means of scanning electron microscopy (SEM) that the main powder fraction consists of hierarchically organized microspheres of 3-10 μm in diameter, and individual nanorods are observed as the second fraction of the powder. Nanorod microstructure was further studied by transmission electron microscopy (TEM). A hierarchically organized NiCo2O4 film was printed on the surface of a flexible carbon paper (CP) using an optimized microplotter printing technique and functional inks based on the obtained oxide powder. It was shown by XRD, TEM, and atomic force microscopy (AFM) that the crystalline structure and microstructural features of the oxide particles are preserved when deposited on the surface of the flexible substrate. It was found that the obtained electrode sample is characterized by a specific capacitance value of 420 F/g at a current density of 1 A/g, and the capacitance loss during 2000 charge-discharge cycles at 10 A/g is 10%, which indicates a high material stability. It was established that the proposed synthesis and printing technology enables the efficient automated formation of corresponding miniature electrode nanostructures as promising components for flexible planar supercapacitors.
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Affiliation(s)
- Tatiana L Simonenko
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky Pr., Moscow 119991, Russia
| | - Nikolay P Simonenko
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky Pr., Moscow 119991, Russia
| | - Philipp Yu Gorobtsov
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky Pr., Moscow 119991, Russia
| | - Elizaveta P Simonenko
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky Pr., Moscow 119991, Russia
| | - Nikolay T Kuznetsov
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky Pr., Moscow 119991, Russia
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39
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Phanthawimol W, Ruengwittayawong S, Katekangplu P. Left coronary cusp ablation for elimination of left ventricular summit premature ventricular complex. J Arrhythm 2023; 39:494-497. [PMID: 37324761 PMCID: PMC10264753 DOI: 10.1002/joa3.12867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/14/2023] [Accepted: 04/25/2023] [Indexed: 06/17/2023] Open
Abstract
We first reported that epicardial LAVA in the LV summit can be mapped and PVC was completely eliminated by RF ablation above the left coronary cusp using single catheter technique.
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Affiliation(s)
- Wipat Phanthawimol
- Cardiac Electrophysiology Unit, Department of CardiologyCentral Chest Institute of ThailandNonthaburiThailand
| | - Sermsuke Ruengwittayawong
- Cardiac Electrophysiology Unit, Department of CardiologyCentral Chest Institute of ThailandNonthaburiThailand
| | - Peerapat Katekangplu
- Cardiac Electrophysiology Unit, Department of CardiologyCentral Chest Institute of ThailandNonthaburiThailand
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40
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Li J, Xu H, Li J, Chen X, Zhang Y, Liu W, Li W, Han C, An S, Wang X, Qiu X. Construction of Inorganic-Rich Cathode Electrolyte Interphase on Co-Free Cathodes. ACS Appl Mater Interfaces 2023. [PMID: 37220156 DOI: 10.1021/acsami.3c02553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Lithium-rich layered oxides (LRLOs), with the chemical formula of xLi2MnO3·(1 - x)LiMO2, delivering higher specific discharge capacity, are potential cathode materials for lithium-ion batteries. However, the dissolution of transition metal ions and the instability of the cathode-electrolyte interphase (CEI) hinder the commercial application of LRLOs. Herein, a simple and affordable method is developed for the construction of a robust CEI layer by quenching a kind of cobalt-free LRLO, Li1.2Ni0.15Fe0.1Mn0.55O2 (denoted as NFM), in 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether solvent. This robust CEI, with well-distributed LiF, TMFx, and partial organic component CFx, performs as a physical barrier to prevent NFM from direct contact with the electrolyte, suppresses the oxygen release, and ensures the CEI layer stability. The customized CEI with LiF and TMFx-rich phase considerably enhances the NFM cycle stability and the initial coulomb efficiency and inhibits voltage fading. This work provides a valuable strategy for designing stable interface chemistry on the cathode of lithium-ion batteries.
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Affiliation(s)
- Jinxing Li
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083 Beijing, China
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Hanying Xu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Jie Li
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Xinping Chen
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Yujuan Zhang
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Wei Liu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Wenting Li
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Ce Han
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Shengli An
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083 Beijing, China
- School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China
| | - Xindong Wang
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083 Beijing, China
| | - Xinping Qiu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, 100084 Beijing, China
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41
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Ding C, Shen Z, Zhu Y, Cheng Y. Insights into the Modification of Carbonous Felt as an Electrode for Vanadium Redox Flow Batteries. Materials (Basel) 2023; 16:ma16103811. [PMID: 37241437 DOI: 10.3390/ma16103811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/07/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023]
Abstract
The vanadium redox flow battery (VRFB) has been regarded as one of the best potential stationary electrochemical storage systems for its design flexibility, long cycle life, high efficiency, and high safety; it is usually utilized to resolve the fluctuations and intermittent nature of renewable energy sources. As one of the critical components of VRFBs to provide the reaction sites for redox couples, an ideal electrode should possess excellent chemical and electrochemical stability, conductivity, and a low price, as well as good reaction kinetics, hydrophilicity, and electrochemical activity, in order to satisfy the requirements for high-performance VRFBs. However, the most commonly used electrode material, a carbonous felt electrode, such as graphite felt (GF) or carbon felt (CF), suffers from relatively inferior kinetic reversibility and poor catalytic activity toward the V2+/V3+ and VO2+/VO2+ redox couples, limiting the operation of VRFBs at low current density. Therefore, modified carbon substrates have been extensively investigated to improve vanadium redox reactions. Here, we give a brief review of recent progress in the modification methods of carbonous felt electrodes, such as surface treatment, the deposition of low-cost metal oxides, the doping of nonmetal elements, and complexation with nanostructured carbon materials. Thus, we give new insights into the relationships between the structure and the electrochemical performance, and provide some perspectives for the future development of VRFBs. Through a comprehensive analysis, it is found that the increase in the surface area and active sites are two decisive factors that enhance the performance of carbonous felt electrodes. Based on the varied structural and electrochemical characterizations, the relationship between the surface nature and electrochemical activity, as well as the mechanism of the modified carbon felt electrodes, is also discussed.
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Affiliation(s)
- Cong Ding
- College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhefei Shen
- College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Ying Zhu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yuanhui Cheng
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Maher C, Yang Y, Truong ND, Wang C, Nikpour A, Kavehei O. Seizure detection with reduced electroencephalogram channels: research trends and outlook. R Soc Open Sci 2023; 10:230022. [PMID: 37153360 PMCID: PMC10154941 DOI: 10.1098/rsos.230022] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 04/11/2023] [Indexed: 05/09/2023]
Abstract
Epilepsy is a prevalent condition characterized by recurrent, unpredictable seizures. Monitoring with surface electroencephalography (EEG) is the gold standard for diagnosing epilepsy, but a time-consuming, uncomfortable and sometimes ineffective process for patients. Further, using EEG over a brief monitoring period has variable success, dependent on patient tolerance and seizure frequency. The availability of hospital resources and hardware and software specifications inherently restrict the options for comfortable, long-term data collection, resulting in limited data for training machine-learning models. This mini-review examines the current patient journey, providing an overview of the current state of EEG monitoring with reduced electrodes and automated channel reduction methods. Opportunities for improving data reliability through multi-modal data fusion are suggested. We assert the need for further research in electrode reduction to advance brain monitoring solutions towards portable, reliable devices that simultaneously offer patient comfort, perform ultra-long-term monitoring and expedite the diagnosis process.
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Affiliation(s)
- Christina Maher
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
- Brain and Mind Centre, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Yikai Yang
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Nhan Duy Truong
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Chenyu Wang
- Brain and Mind Centre, The University of Sydney, Sydney, New South Wales 2006, Australia
- Translational Research Collective, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales 2050, Australia
- Sydney Neuroimaging Analysis Centre, Camperdown, New South Wales 2050, Australia
| | - Armin Nikpour
- Brain and Mind Centre, The University of Sydney, Sydney, New South Wales 2006, Australia
- Central Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales 2006, Australia
- Translational Research Collective, Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales 2050, Australia
| | - Omid Kavehei
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
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Metshein M, Tuulik VR, Tuulik V, Kumm M, Min M, Annus P. Electrical Bioimpedance Analysis for Evaluating the Effect of Pelotherapy on the Human Skin: Methodology and Experiments. Sensors (Basel) 2023; 23:s23094251. [PMID: 37177455 PMCID: PMC10180821 DOI: 10.3390/s23094251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/05/2023] [Accepted: 04/23/2023] [Indexed: 05/15/2023]
Abstract
BACKGROUND Pelotherapy is the traditional procedure of applying curative muds on the skin's surface-shown to have a positive effect on the human body and cure illnesses. The effect of pelotherapy is complex, functioning through several mechanisms, and depends on the skin's functional condition. The current research objective was to develop a methodology and electrodes to assess the passage of the chemical and biologically active compounds of curative mud through human skin by performing electrical bioimpedance (EBI) analysis. METHODS The methodology included local area mud pack and simultaneous tap water compress application on the forearms with the comparison to the measurements of the dry skin. A custom-designed small-area gold-plated electrode on a rigid printed circuit board, in a tetrapolar configuration, was designed. A pilot study experiment with ten volunteers was performed. RESULTS Our results indicated the presence of an effect of pelotherapy, manifested by the varying electrical properties of the skin. Distinguishable difference in the measured real part of impedance (R) emerged, showing a very strong correlation between the dry and tap-water-treated skin (r = 0.941), while a poor correlation between the dry and mud-pack-treated skin (r = 0.166) appeared. The findings emerged exclusively in the frequency interval of 10 kHz …1 MHz and only for R. CONCLUSIONS EBI provides a promising tool for monitoring the variations in the electrical properties of the skin, including the skin barrier. We foresee developing smart devices for promoting the exploitation of spa therapies.
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Affiliation(s)
- Margus Metshein
- Thomas Johann Seebeck Department of Electronics, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
| | - Varje-Riin Tuulik
- West Tallinn Central Hospital, Paldiski Mnt. 68, 10617 Tallinn, Estonia
- The Centre of Excellence in Health Promotion and Rehabilitation, Lihula Mnt. 12/1, 90507 Haapsalu, Estonia
| | - Viiu Tuulik
- The Centre of Excellence in Health Promotion and Rehabilitation, Lihula Mnt. 12/1, 90507 Haapsalu, Estonia
| | - Monika Kumm
- The Centre of Excellence in Health Promotion and Rehabilitation, Lihula Mnt. 12/1, 90507 Haapsalu, Estonia
- Pärnu College, University of Tartu, Ringi 35, 80012 Pärnu, Estonia
| | - Mart Min
- Thomas Johann Seebeck Department of Electronics, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
| | - Paul Annus
- Thomas Johann Seebeck Department of Electronics, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
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Arbi HM, Koyyada G, Anil Kumar Y, Kumar Kulurumotlakatla D, Kim JH, Moniruzzaman M, Alzahmi S, Obaidat IM. Hierarchically Developed Ni(OH) 2@MgCo 2O 4 Nanosheet Composites for Boosting Supercapacitor Performance. Nanomaterials (Basel) 2023; 13:nano13081414. [PMID: 37110999 PMCID: PMC10147020 DOI: 10.3390/nano13081414] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/10/2023] [Accepted: 04/13/2023] [Indexed: 06/01/2023]
Abstract
MgCo2O4 nanomaterial is thought to be a promising candidate for renewable energy storage and conversions. Nevertheless, the poor stability performances and small specific areas of transition-metal oxides remain a challenge for supercapacitor (SC) device applications. In this study, sheet-like Ni(OH)2@MgCo2O4 composites were hierarchically developed on nickel foam (NF) using the facile hydrothermal process with calcination technology, under carbonization reactions. The combination of the carbon-amorphous layer and porous Ni(OH)2 nanoparticles was anticipated to enhance the stability performances and energy kinetics. The Ni(OH)2@MgCo2O4 nanosheet composite achieved a superior specific capacitance of 1287 F g-1 at a current value of 1 A g-1, which is higher than that of pure Ni(OH)2 nanoparticles and MgCo2O4 nanoflake samples. At a current density of 5 A g-1, the Ni(OH)2@MgCo2O4 nanosheet composite delivered an outstanding cycling stability of 85.6%, which it retained over 3500 long cycles with an excellent rate of capacity of 74.5% at 20 A g-1. These outcomes indicate that such a Ni(OH)2@MgCo2O4 nanosheet composite is a good contender as a novel battery-type electrode material for high-performance SCs.
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Affiliation(s)
- Hammad Mueen Arbi
- Department of Physics, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
| | - Ganesh Koyyada
- Department of Chemical Engineering, Yeungnam University, 214-1, Daehak-ro 280, Gyeongsan 712-749, Republic of Korea
| | - Yedluri Anil Kumar
- Department of Chemical & Petroleum Engineering, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
- National Water and Energy Center, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
| | - Dasha Kumar Kulurumotlakatla
- Graduate School of Convergence Science, Pusan Nationfivel University, San 30 Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea
| | - Jae Hong Kim
- Department of Chemical Engineering, Yeungnam University, 214-1, Daehak-ro 280, Gyeongsan 712-749, Republic of Korea
| | - Md Moniruzzaman
- Department of Chemical and Biological Engineering, Gachon University, 1342 Seongnam-daero, Seongnam-si 13120, Republic of Korea
| | - Salem Alzahmi
- Department of Chemical & Petroleum Engineering, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
- National Water and Energy Center, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
| | - Ihab M. Obaidat
- Department of Physics, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
- National Water and Energy Center, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
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Hossain MS, Romo AIB, Putnam S, Dawlaty J, Augustyn V, Rodríguez-López J. Electrode potential driven dissociation of N-heterocycle-BF3 adducts: a possible manifestation of the electro-inductive effect. Angew Chem Int Ed Engl 2023:e202304218. [PMID: 37053046 DOI: 10.1002/anie.202304218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/06/2023] [Accepted: 04/12/2023] [Indexed: 04/14/2023]
Abstract
Recently, non-Faradaic effects were used to modify the electronic structure and reactivity of electrode-bound species. We hypothesize that these electrostatic perturbations could influence the chemical reactivity of electrolyte species near an electrode in the absence of Faradaic electron transfer. A prime example of non-Faradaic effects is acid-base dissociation near an interface. Here, we probed the near-electrode dissociation of N-heterocycle-BF3 Lewis adducts upon electrode polarization, well outside of the redox potential window of the adducts. Using scanning electrochemical microscopy and confocal fluorescence spectroscopy, we detected a potential-dependent depletion of the adduct near the electrode. We propose an electro-inductive effect where a more positive potential leads to electron withdrawal on the N-heterocycle. This study takes a step forward in the use of electrostatics at electrochemical interfaces for field-driven electrocatalytic and electrosynthetic processes.
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Affiliation(s)
- Md Sazzad Hossain
- UIUC: University of Illinois at Urbana-Champaign, Department of Chemistry, 61801, Urbana, UNITED STATES
| | - Adolfo I B Romo
- UIUC: University of Illinois at Urbana-Champaign, Department of Chemistry, 61801, Urbana, UNITED STATES
| | - Seth Putnam
- University of Illinois at Urbana-Champaign, Chemistry, 600 South Matthews Avenue, 61801, Urbana, UNITED STATES
| | - Jahan Dawlaty
- University of Southern California Dana and David Dornsife College of Letters Arts and Sciences, Department of Chemistry, 90089, Los Angelos, UNITED STATES
| | - Veronica Augustyn
- North Carolina State University, Department of Materials Science and Engineering, 27695, Raleigh, UNITED STATES
| | - Joaquín Rodríguez-López
- University of Illinois at Urbana-Champaign, Department of Chemistry, 600 S Mathews Ave., United States, 61801, Urbana, UNITED STATES
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Iso-Mustajärvi M, Silvast T, Heikka T, Tervaniemi J, Calixto R, Linder PH, Dietz A. Trauma After Cochlear Implantation: The Accuracy of Micro-Computed Tomography and Cone-Beam Fusion Computed Tomography Compared With Histology in Human Temporal Bones. Otol Neurotol 2023; 44:339-345. [PMID: 36843083 PMCID: PMC10022666 DOI: 10.1097/mao.0000000000003835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
HYPOTHESIS Micro-computed tomography (micro-CT) and cone-beam computed tomography (CBCT), in conjunction with the image fusion technique, may provide similar results for trauma assessment after cochlear implantation, with respect to the trauma evaluation in preclinical cochlear implant (CI) studies, as the histology. BACKGROUND Before clinical use, novel cochlear implant (CI) designs are tested in temporal bone (TB) studies for usability and risk evaluation. The criterion standard for evaluating intracochlear insertion trauma and electrode location has historically been with histological samples. Progress of modern imaging technology has created alternatives to classic histology. This study compares the micro-CT and CBCT fusion images between histological samples in a preclinical CI study. METHODS Fourteen freshly frozen TBs were inserted with a lateral wall research CI electrode. All TBs were scanned with CBCT preoperatively and postoperatively. After insertion, the TBs were prepared for micro-CT and histology. Twelve TBs underwent first a micro-CT and then the histological process. The CBCTs were used for image fusion, and all three different methods were used for intracochlear trauma evaluation. The results were compared between methods. RESULTS There were 4 of 14 translocations detected with the fusion image method and 3 of 12 with the micro-CT and histology. When compared, the trauma grades converged and were not statistically significant. CONCLUSION The trauma grading based on micro-CT is comparable to the histology. The image fusion technique based on CBCT is less accurate because it relies on an empirical assumption of the basal membrane localization, but it is clinically applicable.
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Affiliation(s)
| | - Tuomo Silvast
- SIB Labs Infrastructure Unit, Faculty of Science and Forestry, University of Eastern Finland
| | - Tuomas Heikka
- Department of Otorhinolaryngology, Kuopio University Hospital
| | - Jyrki Tervaniemi
- Department of Radiology, Kuopio University Hospital, Kuopio, Finland
| | | | - Pia H. Linder
- Department of Otorhinolaryngology, Kuopio University Hospital
| | - Aarno Dietz
- Department of Otorhinolaryngology, Kuopio University Hospital
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孙 晨, 黄 正, 马 荧, 顾 烨, 李 琦. [Cochlear electrode array misplacement into the superior semicircular canal: a case report and literature review]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2023; 37:310-312. [PMID: 36987965 PMCID: PMC10406583 DOI: 10.13201/j.issn.2096-7993.2023.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Indexed: 03/30/2023]
Abstract
Electrode array misplacement is a rare complication of cochlear implant. This article reports an 11-year-old boy who was mistakenly implanted the cochlear electrode array into the superior semicircular canal during the initial cochlear implant. After the diagnosis was confirmed, he underwent a second cochlear implant and the electrode array were successfully implanted into the cochlea. This article conducted a systematic review of the literature on electrode array misplacement, and the causes of electrode array misplacement were analyzed from different implantation position.
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Affiliation(s)
- 晨 孙
- 南京医科大学附属儿童医院耳鼻咽喉头颈外科(南京,210008)Department of Otorhinolaryngology Head and Neck Surgery, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
| | - 正华 黄
- 南京医科大学附属儿童医院耳鼻咽喉头颈外科(南京,210008)Department of Otorhinolaryngology Head and Neck Surgery, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
| | - 荧雪 马
- 无锡市儿童医院耳鼻咽喉科Department of Otorhinolaryngology, Wuxi Children's Hospital
| | - 烨 顾
- 宜兴市人民医院耳鼻咽喉科Department of Otorhinolaryngology, Yixing People's Hospital
| | - 琦 李
- 南京医科大学附属儿童医院耳鼻咽喉头颈外科(南京,210008)Department of Otorhinolaryngology Head and Neck Surgery, Children's Hospital of Nanjing Medical University, Nanjing, 210008, China
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Mbebou M, Polat S, Zengin H. Sustainable Cauliflower-Patterned CuFe 2O 4 Electrode Production from Chalcopyrite for Supercapacitor Applications. Nanomaterials (Basel) 2023; 13:1105. [PMID: 36985999 PMCID: PMC10057429 DOI: 10.3390/nano13061105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/13/2023] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
The primary purpose of this study was to produce an ore-based high-capacity supercapacitor electrode. For this, chalcopyrite ore was first leached with nitric acid, and then metal oxide synthesis was carried out immediately on nickel foam using a hydrothermal technique from the solution. Cauliflower-patterned CuFe2O4 with a wall thickness of about 23 nm was synthesized on the Ni foam surface, characterized by XRD, FTIR, XPS, SEM, and TEM investigations. The produced electrode also displayed a feature of a battery-like charge storage mechanism with a specific capacity of 525 mF cm-2 at 2 mA cm-2 current density, energy of 8.9 mWh cm-2, and a power density of 233 mW cm-2. Additionally, even after 1350 cycles, this electrode still performed at 109% of its original capacity. The performance of this finding is 255% higher than that of the CuFe2O4 in our earlier investigation; despite being pure, it performs far better than some of its equivalents in the literature. Obtaining such performance from an electrode made from ore indicates that the use of ore has a lot of potential for supercapacitor production and property improvement.
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Affiliation(s)
- Moctar Mbebou
- Material Research and Development Centre, Karabuk University, Karabuk 78050, Turkey
- Nano Energy Laboratory, Karabuk University, Karabuk 78050, Turkey
- Metallurgy and Materials Engineering, Karabuk University, Karabuk 78050, Turkey
| | - Safa Polat
- Material Research and Development Centre, Karabuk University, Karabuk 78050, Turkey
- Nano Energy Laboratory, Karabuk University, Karabuk 78050, Turkey
- Metallurgy and Materials Engineering, Karabuk University, Karabuk 78050, Turkey
| | - Huseyin Zengin
- Institute of Chemical Technology of Inorganic Materials (TIM), Johannes Kepler University Linz, 4040 Linz, Austria
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Fu H, Jiang Y, Lv J, Huang Y, Gai Z, Liu Y, Lee PS, Xu H, Wu D. Multilayer Dielectric Elastomer with Reconfigurable Electrodes for Artificial Muscle. Adv Sci (Weinh) 2023; 10:e2206094. [PMID: 36658692 PMCID: PMC10037966 DOI: 10.1002/advs.202206094] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/08/2022] [Indexed: 06/17/2023]
Abstract
High-performance multilayer dielectric elastomer actuators (DEAs) are well-positioned to overcome the insufficient output force and energy density as artificial muscles. However, due to the fabrication process, the multilayer DEAs with nonmodifiable structures often suffer from the limitation of short lifespans and scalable preparation. Herein, reusable multilayer DEAs with the detachable and reconfigurable structure are fabricated. This is achieved by realizing scalable compliant electrodes using the continuous spatial confining forced network assembly (CSNA) method and combining the vacuum lamination (VL) approach to have good attachability and detachability with the VHB dielectric elastomer. The flexible roller-based CSNA method is used to prepare the large area compliant electrodes composed of α, ω-dihydroxy polydimethylsiloxane and electrically conductive nanoparticles. The fabricated electrodes can continuously work over 10 000 cycles at 40% strained stretching and maintain smooth surfaces to construct multilayer DEAs. Moreover, owing to the detachable configuration of the DEAs, the electrodes can also be recovered and reused for building new actuators. The lower limb assistive device is demonstrated by detachable multilayer spring roll DEAs, achieving approximately 3.1 degrees of flexion and extension movement of knee models under a voltage of 7 kV. The detachable and reconfigurable multilayer DEAs shed new light on the applications of wearable assistive devices.
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Affiliation(s)
- Hongbo Fu
- College of Mechanical and Electrical EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Yong Jiang
- College of Mechanical and Electrical EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Jian Lv
- School of Materials Science and EngineeringNanyang Technological UniversitySingapore639798Singapore
| | - Yao Huang
- College of Mechanical and Electrical EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Zipeng Gai
- College of Mechanical and Electrical EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Ying Liu
- College of Mechanical and Electrical EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Pooi See Lee
- School of Materials Science and EngineeringNanyang Technological UniversitySingapore639798Singapore
- Singapore‐HUJI Alliance for Research and Enterprise (SHARE)Smart Grippers for Soft Robotics (SGSR)Campus for Research Excellence and Technological Enterprise (CREATE)Singapore138602Singapore
| | - Hong Xu
- College of Mechanical and Electrical EngineeringBeijing University of Chemical TechnologyBeijing100029China
- State Key Laboratory of Organic‐Inorganic CompositesBeijing University of Chemical TechnologyBeijing100029China
| | - Daming Wu
- College of Mechanical and Electrical EngineeringBeijing University of Chemical TechnologyBeijing100029China
- State Key Laboratory of Organic‐Inorganic CompositesBeijing University of Chemical TechnologyBeijing100029China
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Bruce CG, Khan JM, Rogers T, Yildirim DK, Babaliaros VC, Greenbaum AB, Lederman RJ. Transcatheter Electrosurgery: A Narrative Review. Circ Cardiovasc Interv 2023; 16:e012019. [PMID: 36799217 PMCID: PMC10108249 DOI: 10.1161/circinterventions.122.012019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 01/04/2023] [Indexed: 02/18/2023]
Abstract
Transcatheter electrosurgery describes the ability to cut and traverse tissue, at a distance, without an open surgical field and is possible using either purpose-built or off-the-shelf devices. Tissue traversal requires focused delivery of radiofrequency energy to a guidewire tip. Initially employed to cross atretic pulmonary valves, tissue traversal has enabled transcaval aortic access, recanalization of arterial and venous occlusions, transseptal access, and many other techniques. To cut tissue, the selectively denuded inner curvature of a kinked guidewire (the Flying-V) or a single-loop snare is energized during traction. Adjunctive techniques may complement or enable contemporary transcatheter procedures, whereas myocardial slicing or excision of ectopic masses may offer definitive therapy. In this contemporary review we discuss the principles of transcatheter electrosurgery, and through exemplary clinical applications highlight the range of therapeutic options offered by this versatile family of procedures.
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Affiliation(s)
- Christopher G. Bruce
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jaffar M. Khan
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Toby Rogers
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
- MedStar Washington Hospital Center, Washington, DC, USA
| | - D. Korel Yildirim
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | | | - Adam B. Greenbaum
- Structural Heart and Valve Center, Emory University Hospital, Atlanta, GA, USA
| | - Robert J. Lederman
- Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
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