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Shah DD, Carter P, Shivdasani MN, Fong N, Duan W, Esrafilzadeh D, Poole-Warren LA, Aregueta Robles UA. Deciphering platinum dissolution in neural stimulation electrodes: Electrochemistry or biology? Biomaterials 2024; 309:122575. [PMID: 38677220 DOI: 10.1016/j.biomaterials.2024.122575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/28/2024] [Accepted: 04/13/2024] [Indexed: 04/29/2024]
Abstract
Platinum (Pt) is the metal of choice for electrodes in implantable neural prostheses like the cochlear implants, deep brain stimulating devices, and brain-computer interfacing technologies. However, it is well known since the 1970s that Pt dissolution occurs with electrical stimulation. More recent clinical and in vivo studies have shown signs of corrosion in explanted electrode arrays and the presence of Pt-containing particulates in tissue samples. The process of degradation and release of metallic ions and particles can significantly impact on device performance. Moreover, the effects of Pt dissolution products on tissue health and function are still largely unknown. This is due to the highly complex chemistry underlying the dissolution process and the difficulty in decoupling electrical and chemical effects on biological responses. Understanding the mechanisms and effects of Pt dissolution proves challenging as the dissolution process can be influenced by electrical, chemical, physical, and biological factors, all of them highly variable between experimental settings. By evaluating comprehensive findings on Pt dissolution mechanisms reported in the fuel cell field, this review presents a critical analysis of the possible mechanisms that drive Pt dissolution in neural stimulation in vitro and in vivo. Stimulation parameters, such as aggregate charge, charge density, and electrochemical potential can all impact the levels of dissolved Pt. However, chemical factors such as electrolyte types, dissolved gases, and pH can all influence dissolution, confounding the findings of in vitro studies with multiple variables. Biological factors, such as proteins, have been documented to exhibit a mitigating effect on the dissolution process. Other biological factors like cells and fibro-proliferative responses, such as fibrosis and gliosis, impact on electrode properties and are suspected to impact on Pt dissolution. However, the relationship between electrical properties of stimulating electrodes and Pt dissolution remains contentious. Host responses to Pt degradation products are also controversial due to the unknown chemistry of Pt compounds formed and the lack of understanding of Pt distribution in clinical scenarios. The cytotoxicity of Pt produced via electrical stimulation appears similar to Pt-based compounds, including hexachloroplatinates and chemotherapeutic agents like cisplatin. While the levels of Pt produced under clinical and acute stimulation regimes were typically an order of magnitude lower than toxic concentrations observed in vitro, further research is needed to accurately assess the mass balance and type of Pt produced during long-term stimulation and its impact on tissue response. Finally, approaches to mitigating the dissolution process are reviewed. A wide variety of approaches, including stimulation strategies, coating electrode materials, and surface modification techniques to avoid excess charge during stimulation and minimise tissue response, may ultimately support long-term and safe operation of neural stimulating devices.
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Affiliation(s)
- Dhyey Devashish Shah
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
| | - Paul Carter
- Cochlear Ltd, Macquarie University, NSW, Australia
| | | | - Nicole Fong
- Cochlear Ltd, Macquarie University, NSW, Australia
| | - Wenlu Duan
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
| | - Dorna Esrafilzadeh
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
| | - Laura Anne Poole-Warren
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia; The Tyree Foundation Institute of Health Engineering, University of New South Wales, Sydney, Australia.
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2
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Li Y, Liao X, Xie B, Li Y, Zheng Q, Lin D. Hollow VO 2 microspheres anchored on graphene as advanced cathodes for aqueous zinc-ion batteries. J Colloid Interface Sci 2024; 662:404-412. [PMID: 38359504 DOI: 10.1016/j.jcis.2024.01.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/25/2024] [Accepted: 01/31/2024] [Indexed: 02/17/2024]
Abstract
Vanadium dioxide-based materials have been proved to be promising cathodes for aqueous zinc ion batteries (AZIBs) due to their cost-effectiveness and high theoretical specific capacity; nevertheless, the low electronic conductivity and poor cycle stability restrict their application. Herein, hollow VO2 microspheres anchored on graphene oxide (H-VO2@GO) are synthesized via a facile simple hydrothermal reaction as high-performance cathodes for AZIBs. The hollow micromorphology of the material provides a large specific surface area and effectively alleviates the volume changes during cycling, while the anchoring of VO2 on graphene oxide greatly improves the electronic conductivity and inhibits the agglomeration and pulverization of the material. Resulting from the combination of unique micromorphology and graphene oxide anchoring, the as-prepared H-VO2@GO exhibits the impressive specific capacity of 400.1 mAh/g at 0.5 A/g and excellent cycling performance with 96.1 % of capacity retention after 1500 cycles at 10 A/g. This investigation provides a use reference for designing high-performance cathodes materials for AZIBs by optimizing the microstructure of electrode materials.
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Affiliation(s)
- Yangjie Li
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Xiangyue Liao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Bin Xie
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Yuanxia Li
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Qiaoji Zheng
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China
| | - Dunmin Lin
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, PR China.
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3
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He DS. Removal of silicon-containing contaminants from TEM specimens. Ultramicroscopy 2023; 253:113797. [PMID: 37419063 DOI: 10.1016/j.ultramic.2023.113797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 05/07/2023] [Accepted: 06/19/2023] [Indexed: 07/09/2023]
Abstract
Contaminant-free specimens are an essential prerequisite for high-quality electron microscopy. Silicon is the second most abundant element in the earth's crust with similar chemical properties to that of carbon. However, as a potential source of contamination, silicon has been occasionally reported but not specifically addressed in the electron microscopy community to date. This work highlights the widespread presence of silicon-containing contaminants on TEM specimens, and proposes a general solution for this type of contaminants by using SF6 as a silicon remover. After the treatment, both hydrocarbons and silicon-containing contaminants were removed and no further electron beam showering was needed for most of the specimens to achieve time-invariant imaging. It is expected that this method could be beneficial not only for electron microscopes but also for other surface-sensitive analytical instruments.
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Affiliation(s)
- Dong Sheng He
- Core Research Facilities, Southern University of Science and Technology, No 1088, XueYuan Rd., Xili, NanShan District, ShenZhen, GuangDong 518055, China.
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4
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Nadtochiy AB, Gorb AM, Gorelov BM, Polovina OI, Korotchenkov O, Schlosser V. Model Approach to Thermal Conductivity in Hybrid Graphene-Polymer Nanocomposites. Molecules 2023; 28:7343. [PMID: 37959762 PMCID: PMC10647783 DOI: 10.3390/molecules28217343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
The thermal conductivity of epoxy nanocomposites filled with self-assembled hybrid nanoparticles composed of multilayered graphene nanoplatelets and anatase nanoparticles was described using an analytical model based on the effective medium approximation with a reasonable amount of input data. The proposed effective thickness approach allowed for the simplification of the thermal conductivity simulations in hybrid graphene@anatase TiO2 nanosheets by including the phenomenological thermal boundary resistance. The sensitivity of the modeled thermal conductivity to the geometrical and material parameters of filling particles and the host polymer matrix, filler's mass concentration, self-assembling degree, and Kapitza thermal boundary resistances at emerging interfaces was numerically evaluated. A fair agreement of the calculated and measured room-temperature thermal conductivity was obtained.
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Affiliation(s)
- Andriy B. Nadtochiy
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine; (A.B.N.); (A.M.G.); (O.I.P.); (O.K.)
| | - Alla M. Gorb
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine; (A.B.N.); (A.M.G.); (O.I.P.); (O.K.)
| | - Borys M. Gorelov
- Chuiko Institute of Surface Chemistry, NAS of Ukraine, 17 General Naumov Str., 03164 Kyiv, Ukraine;
| | - Oleksiy I. Polovina
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine; (A.B.N.); (A.M.G.); (O.I.P.); (O.K.)
| | - Oleg Korotchenkov
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine; (A.B.N.); (A.M.G.); (O.I.P.); (O.K.)
- Erwin Schrödinger International Institute for Mathematics and Physics, University of Vienna, 1090 Vienna, Austria
| | - Viktor Schlosser
- Department of Electronic Properties of Materials, Faculty of Physics, University of Vienna, 1090 Wien, Austria
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5
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Zainab S, Azeem M, Awan SU, Rizwan S, Iqbal N, Rashid J. Optimization of bandgap reduction in 2-dimensional GO nanosheets and nanocomposites of GO/iron-oxide for electronic device applications. Sci Rep 2023; 13:6954. [PMID: 37117234 PMCID: PMC10147644 DOI: 10.1038/s41598-023-33200-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 04/08/2023] [Indexed: 04/30/2023] Open
Abstract
In this report we have developed different fabrication parameters to tailor the optical bandgap of graphene oxide (GO) nanosheets to make it operational candidate in electronic industry. Here we performed two ways to reduce the bandgap of GO nanosheets. First, we have optimized the oxidation level of GO by reducing amount of oxidizing agent (i.e. KMnO4) to control the sp2/sp3 hybridization ratio for a series of GO nanosheets samples. We noticed the reduction in primary band edge 3.93-3.2 eV while secondary band edge 2.98-2.2 eV of GO nanosheets as the amount of KMnO4 is decreased from 100 to 30%. Second, we have fabricated a series of 2-dimensional nanocomposites sample containing GO/Iron-oxide by using a novel synthesis process wet impregnation method. XRD analysis of synthesized nanocomposites confirmed the presence of both phases,[Formula: see text]-Fe2O3 and Fe3O4 of iron-oxide with prominent plane (001) of GO. Morphological investigation rules out all the possibilities of agglomerations of iron oxide nanoparticles and coagulation of GO nanosheets. Elemental mapping endorsed the homogeneous distribution of iron oxide nanoparticles throughout the GO nanosheets. Raman spectroscopy confirmed the fairly constant ID/IG ratio and FWHM of D and G peaks, thus proving the fact that the synthesis process of nanocomposites has no effect on the degree of oxidation of GO flakes. Red shift in G peak position of all the nanocomposites samples showed the electronic interaction among the constituents of the nanocomposite. Linear decrease in the intensity of PL (Photoluminescence) spectra with the increasing of Iron oxide nanoparticles points towards the increased interaction among the iron oxide nanoparticles and GO flakes. Optical absorption spectroscopy reveals the linear decrease in primary edge of bandgap from 2.8 to 0.99 eV while secondary edge decrease 3.93-2.2 eV as the loading of [Formula: see text]-Fe2O3 nanoparticles is increased from 0 to 5% in GO nanosheets. Among these nanocomposites samples 5%-iron-oxide/95%-GO nanosheet sample may be a good contestant for electronic devices.
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Affiliation(s)
- Sana Zainab
- Department of Electrical Engineering, College of Electrical and Mechanical Engineering, National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan.
| | - Muhammad Azeem
- Department of Electrical Engineering, College of Electrical and Mechanical Engineering, National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Saif Ullah Awan
- Department of Electrical Engineering, College of Electrical and Mechanical Engineering, National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan.
| | - Syed Rizwan
- Department of Physics, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Naseem Iqbal
- US-Pakistan Centre for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Jamshaid Rashid
- Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
- BNU-HKUST Laboratory for Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, 519087, China
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6
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Singh M, Ingle A, González A, Mariathomas P, Ramanathan R, Taylor PD, Christofferson AJ, Spencer MJS, Low MX, Ahmed T, Walia S, Trasobares S, Manzorro R, Calvino JJ, García-Fernández E, Orte A, Dominguez-Vera JM, Bansal V. Repairing and Preventing Photooxidation of Few-Layer Black Phosphorus with β-Carotene. ACS NANO 2023; 17:8083-8097. [PMID: 37093765 DOI: 10.1021/acsnano.2c10232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Few-layer black phosphorus (FLBP), a technologically important 2D material, faces a major hurdle to consumer applications: spontaneous degradation under ambient conditions. Blocking the direct exposure of FLBP to the environment has remained the key strategy to enhance its stability, but this can also limit its utility. In this paper, a more ambitious approach to handling FLBP is reported where not only is FLBP oxidation blocked, but it is also repaired postoxidation. Our approach, inspired by nature, employs the antioxidant molecule β-carotene that protects plants against photooxidative damages to act as a protecting and repairing agent for FLBP. The mechanistic role of β-carotene is established by a suite of spectro-microscopy techniques, in combination with computational studies and biochemical assays. Transconductance studies on FLBP-based field effect transistor (FET) devices further affirm the protective and reparative effects of β-carotene. The outcomes indicate the potential for deploying a plethora of natural antioxidant molecules to enhance the stability of other environmentally sensitive inorganic nanomaterials and expedite their translation for technological and consumer applications.
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Affiliation(s)
- Mandeep Singh
- Ian Potter NanoBiosensing Facility, NanoBiotechnology Research Laboratory, RMIT University, Melbourne, Victoria 3000, Australia
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - Aviraj Ingle
- Ian Potter NanoBiosensing Facility, NanoBiotechnology Research Laboratory, RMIT University, Melbourne, Victoria 3000, Australia
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - Ana González
- Departamento de Química Inorgánica and Instituto de Biotecnología. Unidad de Excelencia de Química aplicada a Biomedicina y Medioambiente, Universidad de Granada, 18071 Granada, Spain
| | - Pyria Mariathomas
- Ian Potter NanoBiosensing Facility, NanoBiotechnology Research Laboratory, RMIT University, Melbourne, Victoria 3000, Australia
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - Rajesh Ramanathan
- Ian Potter NanoBiosensing Facility, NanoBiotechnology Research Laboratory, RMIT University, Melbourne, Victoria 3000, Australia
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - Patrick D Taylor
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | | | - Michelle J S Spencer
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), RMIT University, Melbourne, Victoria 3000, Australia
| | - Mei Xian Low
- School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Taimur Ahmed
- School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Sumeet Walia
- School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Susana Trasobares
- Departamento Ciencia de Materiales e Ingeniería Metalúrgicay Química Inorgánica, Universidad de Cádiz, 11510 Cádiz, Spain
| | - Ramón Manzorro
- Departamento Ciencia de Materiales e Ingeniería Metalúrgicay Química Inorgánica, Universidad de Cádiz, 11510 Cádiz, Spain
| | - Jose J Calvino
- Departamento Ciencia de Materiales e Ingeniería Metalúrgicay Química Inorgánica, Universidad de Cádiz, 11510 Cádiz, Spain
| | - Emilio García-Fernández
- Nanoscopy-UGR Lab. Departamento de Fisicoquímica. Unidad de Excelencia de Química aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, 18071 Granada, Spain
| | - Angel Orte
- Nanoscopy-UGR Lab. Departamento de Fisicoquímica. Unidad de Excelencia de Química aplicada a Biomedicina y Medioambiente, Facultad de Farmacia, Universidad de Granada, 18071 Granada, Spain
| | - Jose M Dominguez-Vera
- Departamento de Química Inorgánica and Instituto de Biotecnología. Unidad de Excelencia de Química aplicada a Biomedicina y Medioambiente, Universidad de Granada, 18071 Granada, Spain
| | - Vipul Bansal
- Ian Potter NanoBiosensing Facility, NanoBiotechnology Research Laboratory, RMIT University, Melbourne, Victoria 3000, Australia
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
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7
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Wang H, Li S, Lu H, Zhu M, Liang H, Wu X, Zhang Y. Carbon-Based Flexible Devices for Comprehensive Health Monitoring. SMALL METHODS 2023; 7:e2201340. [PMID: 36617527 DOI: 10.1002/smtd.202201340] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/16/2022] [Indexed: 06/17/2023]
Abstract
Traditional public health systems suffer from incomprehensive, delayed, and inefficient medical services. Convenient and comprehensive health monitoring has been highly sought after recently. Flexible and wearable devices are attracting wide attention due to their potential applications in wearable human health monitoring and care systems. Using carbon materials with overall superiorities can facilitate the development of wearable and flexible devices with various functions and excellent performance, which can comprehensively and real-time monitor human health status and prevent diseases. Herein, the latest advances in the rational design and controlled fabrication of carbon materials for applications in health-related flexible and wearable electronics are reviewed. The fabrication strategies, working mechanism, performance, and applications in health monitoring of carbon-based flexible devices, including electromechanical sensors, temperature/humidity sensors, chemical sensors, and flexible conductive wires/electrodes, are reviewed. Furthermore, integrating multiple carbon-based devices into multifunctional wearable systems is discussed. Finally, the existing challenges and future opportunities in this field are also proposed.
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Affiliation(s)
- Haomin Wang
- Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Shuo Li
- Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Haojie Lu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Mengjia Zhu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Huarun Liang
- Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Xunen Wu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Yingying Zhang
- Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
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8
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Chen Z, Ren Z, Zheng R, Gao H, Ni BJ. Migration behavior of impurities during the purification of waste graphite powders. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 315:115150. [PMID: 35489188 DOI: 10.1016/j.jenvman.2022.115150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/19/2022] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
Metal-laden solid wastes (e.g., waste graphite powders) have attracted great attention owing to their hazardous effects on the surrounding soil and water. Additionally, the metal-bearing impurities also hinder the reutilization of waste graphite powders. Thus, it is necessary to remove these inorganic impurities and figure out the removal mechanism of impurities in the purification process. In this study, an alkaline roasting-water washing-acid leaching (AWA) method was used to upgrade the waste graphite powders, and the migration behavior of diverse impurities has been qualitatively and quantitatively investigated. A graphite product with high impurity removal efficiencies is attained under optimal conditions. The removal of impurities mainly follows three routes: (1) V-, P-, and S-bearing impurities were complete removed (some formed soluble salts during alkaline roasting, and the remainder was dissolved in acid); (2) most Al-, K-, and Si-bearing impurities were removed by alkaline roasting, with the remainder was dissolved in the acid-leaching process; and (3) Fe-, Mg-, Ti-, Ca-, and Zn-bearing impurities were decomposed at high temperature and reacted with alkali to form hydroxides or oxides, which was subsequently dissolved in acid. In addition, the treatment of the generated wastewater is also discussed. The uncovered migration mechanisms of diverse impurities would guide the purification and reutilization process of other metal-bearing solid wastes efficiently.
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Affiliation(s)
- Zhijie Chen
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China; Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW, 2007, Australia
| | - Zijie Ren
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China; Hubei Key Laboratory of Mineral Resources Processing & Environment, Wuhan, 430070, China.
| | - Renji Zheng
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China; School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan, 410083, China
| | - Huimin Gao
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070, China; Hubei Key Laboratory of Mineral Resources Processing & Environment, Wuhan, 430070, China
| | - Bing-Jie Ni
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW, 2007, Australia.
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9
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Mechanical, Thermal and Electrical Properties of Epoxy Nanocomposites with Amine-Functionalized Reduced Graphene Oxide via Plasma Treatment. JOURNAL OF COMPOSITES SCIENCE 2022. [DOI: 10.3390/jcs6060153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A suitable functionalization of graphene and its derivatives can further enhance the material properties of nanocomposites. In contrast to chemical functionalization methods that have been extensively researched, functionalization by plasma treatment is relatively unexplored. In this work, we compare the mechanical, thermal and electrical characteristics of an epoxy matrix incorporating loadings from 0.00 to 1.50 wt% of non-functionalized (rGO) and amine-functionalized reduced graphene oxide (frGO) for which the functionalization is realized by plasma processing. No significant difference between the rGO- and frGO-including nanocomposites was observed with respect to the stiffness, strength, specific heat capacity, coefficient of thermal expansion and electrical conductivity. Yet, the composites with 1.50 wt% frGO (rGO) exhibited a thermal conductivity that was 27% (20%) higher than the neat polymer due to the enhanced interface, which enabled a better transfer of heat. In addition, a considerable increase in the specific heat capacity and thermal conductivity was established with rising temperatures. This information will facilitate the choice of materials depending on the loading and functionalization of graphene materials for composite applications with an epoxy matrix.
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10
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Kalinke C, de Oliveira PR, Neumsteir NV, Henriques BF, de Oliveira Aparecido G, Loureiro HC, Janegitz BC, Bonacin JA. Influence of filament aging and conductive additive in 3D printed sensors. Anal Chim Acta 2022; 1191:339228. [PMID: 35033250 DOI: 10.1016/j.aca.2021.339228] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/18/2021] [Accepted: 10/27/2021] [Indexed: 11/26/2022]
Abstract
3D printing technology combined with electrochemical techniques have allowed the development of versatile and low-cost devices. However, some aspects need to be considered for the good quality and useful life of the sensors. In this work, we have demonstrated herein that the filament aging, the conductive material, and the activation processes (post-treatments) can influence the surface characteristics and the electrochemical performance of the 3D printed sensors. Commercial filaments and 3D printed sensors were morphologically, thermally, and electrochemically analyzed. The activated graphene-based (Black Magic®) sensor showed the best electrochemical response, compared to the carbon black-filament (Proto-Pasta®). In addition, we have proven that filament aging harms the performance of the sensors since the electrodes produced with three years old filament had a considerably lower intra-days reproducibility. Finally, the activated graphene-based sensor has shown the best performance for the electrochemical detection of bisphenol A, demonstrating the importance of evaluating and control the characteristics and quality of filaments to improve the mechanical, conductive, and electrochemical performance of 3D printed sensors.
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Affiliation(s)
- Cristiane Kalinke
- Institute of Chemistry, University of Campinas (UNICAMP), 13083-859, Campinas, São Paulo, Brazil.
| | - Paulo Roberto de Oliveira
- Department of Nature Science, Mathematics and Education, Federal University of São Carlos (UFSCar), 13600-970, Araras, São Paulo, Brazil
| | | | - Brunna Ferri Henriques
- Department of Nature Science, Mathematics and Education, Federal University of São Carlos (UFSCar), 13600-970, Araras, São Paulo, Brazil
| | | | - Hugo Campos Loureiro
- Institute of Chemistry, University of Campinas (UNICAMP), 13083-859, Campinas, São Paulo, Brazil
| | - Bruno Campos Janegitz
- Department of Nature Science, Mathematics and Education, Federal University of São Carlos (UFSCar), 13600-970, Araras, São Paulo, Brazil
| | - Juliano Alves Bonacin
- Institute of Chemistry, University of Campinas (UNICAMP), 13083-859, Campinas, São Paulo, Brazil.
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11
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Baharfar M, Mayyas M, Rahbar M, Allioux FM, Tang J, Wang Y, Cao Z, Centurion F, Jalili R, Liu G, Kalantar-Zadeh K. Exploring Interfacial Graphene Oxide Reduction by Liquid Metals: Application in Selective Biosensing. ACS NANO 2021; 15:19661-19671. [PMID: 34783540 DOI: 10.1021/acsnano.1c06973] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Liquid metals (LMs) are electronic liquid with enigmatic interfacial chemistry and physics. These features make them promising materials for driving chemical reactions on their surfaces for designing nanoarchitectonic systems. Herein, we showed the interfacial interaction between eutectic gallium-indium (EGaIn) liquid metal and graphene oxide (GO) for the reduction of both substrate-based and free-standing GO. NanoIR surface mapping indicated the successful removal of carbonyl groups. Based on the gained knowledge, a composite consisting of assembled reduced GO sheets on LM microdroplets (LM-rGO) was developed. The LM enforced Ga3+ coordination within the rGO assembly found to modify the electrochemical interface for selective dopamine sensing by separating the peaks of interfering biologicals. Subsequently, paper-based electrodes were developed and modified with the LM-rGO that presented the compatibility of the assembly with low-cost commercial technologies. The observed interfacial interaction, imparted by LM's interfaces, and electrochemical performance observed for LM-rGO will lead to effective functional materials and electrode modifiers.
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Affiliation(s)
- Mahroo Baharfar
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Mohannad Mayyas
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Mohammad Rahbar
- Graduate School of Biomedical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Francois-Marie Allioux
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Jianbo Tang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Yifang Wang
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Zhenbang Cao
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Franco Centurion
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Rouhollah Jalili
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Guozhen Liu
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen 518172, P. R. China
| | - Kourosh Kalantar-Zadeh
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
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12
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Synthesis of sulfonated lignin-derived ordered mesoporous carbon for catalytic production of furfural from xylose. Int J Biol Macromol 2021; 187:232-239. [PMID: 34314791 DOI: 10.1016/j.ijbiomac.2021.07.155] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 07/14/2021] [Accepted: 07/22/2021] [Indexed: 01/15/2023]
Abstract
Sulfonated lignin-derived ordered mesoporous carbon (OMC-SO3H) solid acid was synthesized through solvent evaporation induced self-assembly (EISA) method followed by sulfonation, using lignin as carbon precursor and glyoxal as cross-linking agent during the preparation process. The as-synthesized OMC-SO3H exhibited a typical 2D hexagonal meso-structure (space group p6mm) and showed a good catalytic performance for the catalytic conversion of hemicellulose-derived xylose to furfural. A highest furfural yield of 76.7% with 100% xylose conversion was achieved at 200 °C for 45 min in γ-valerolactone (GVL)-water (85:15 v/v%) mixture. The lignin-derived OMC-SO3H solid acid catalyst showed superior stability and reusability, and was also applicable to the catalytic production of furfural from xylan. This work provides a promising strategy for the synthesis of ordered mesoporous carbon solid acid from green and sustainable lignin biomass resource, which has wide range of applications in the utilization of cellulose and hemicellulose.
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13
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Jalili AR, Satalov A, Nazari S, Rahmat Suryanto BH, Sun J, Ghasemian MB, Mayyas M, Kandjani AE, Sabri YM, Mayes E, Bhargava SK, Araki J, Zakri C, Poulin P, Esrafilzadeh D, Amal R. Liquid Crystal-Mediated 3D Printing Process to Fabricate Nano-Ordered Layered Structures. ACS APPLIED MATERIALS & INTERFACES 2021; 13:28627-28638. [PMID: 34110785 DOI: 10.1021/acsami.1c05025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The emergence of three-dimensional (3D) printing promises a disruption in the design and on-demand fabrication of smart structures in applications ranging from functional devices to human organs. However, the scale at which 3D printing excels is within macro- and microlevels and principally lacks the spatial ordering of building blocks at nanolevels, which is vital for most multifunctional devices. Herein, we employ liquid crystal (LC) inks to bridge the gap between the nano- and microscales in a single-step 3D printing. The LC ink is prepared from mixtures of LCs of nanocellulose whiskers and large sheets of graphene oxide, which offers a highly ordered laminar organization not inherently present in the source materials. LC-mediated 3D printing imparts the fine-tuning required for the design freedom of architecturally layered systems at the nanoscale with intricate patterns within the 3D-printed constructs. This approach empowered the development of a high-performance humidity sensor composed of self-assembled lamellar organization of NC whiskers. We observed that the NC whiskers that are flat and parallel to each other in the laminar organization allow facile mass transport through the structure, demonstrating a significant improvement in the sensor performance. This work exemplifies how LC ink, implemented in a 3D printing process, can unlock the potential of individual constituents to allow macroscopic printing architectures with nanoscopic arrangements.
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Affiliation(s)
- Ali Rouhollah Jalili
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, New South Wales, Australia
| | - Alexandra Satalov
- Institut für Anorganische Chemie, Leibniz Universität Hannover, Callinstr. 9, Hannover 30167, Germany
| | - Sahar Nazari
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, New South Wales, Australia
| | - Bryan Harry Rahmat Suryanto
- Australian Centre for Electromaterials Science, School of Chemistry, Monash University, Clayton 3800, Victoria, Australia
| | - Jing Sun
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, New South Wales, Australia
| | - Mohammad Bagher Ghasemian
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, New South Wales, Australia
| | - Mohannad Mayyas
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, New South Wales, Australia
| | - Ahmad E Kandjani
- School of Science, RMIT University, Melbourne 3001, Victoria, Australia
| | - Ylias M Sabri
- School of Science, RMIT University, Melbourne 3001, Victoria, Australia
| | - Edwin Mayes
- School of Science, RMIT University, Melbourne 3001, Victoria, Australia
| | - Suresh K Bhargava
- School of Science, RMIT University, Melbourne 3001, Victoria, Australia
| | - Jun Araki
- Faculty of Textile Science and Technology, Shinshu University, Tokida 3-15-1, Ueda 386-8567, Nagano prefecture, Japan
- Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda 386-8567, Nagano prefecture, Japan
| | - Cécile Zakri
- Centre de Recherche Paul Pascal-CNRS, University of Bordeaux, Pessac 33600, France
| | - Philippe Poulin
- Centre de Recherche Paul Pascal-CNRS, University of Bordeaux, Pessac 33600, France
| | - Dorna Esrafilzadeh
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney 2031, New South Wales, Australia
| | - Rose Amal
- School of Chemical Engineering, University of New South Wales (UNSW), Sydney 2052, New South Wales, Australia
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14
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Chen Q, Feng NB, Huang XH, Yao Y, Jin YR, Pan W, Liu D. Humidity-Sensing Properties of a BiOCl-Coated Quartz Crystal Microbalance. ACS OMEGA 2020; 5:18818-18825. [PMID: 32775883 PMCID: PMC7408249 DOI: 10.1021/acsomega.0c01946] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/08/2020] [Indexed: 05/26/2023]
Abstract
The performance of a bismuth oxychloride (BiOCl)-based quartz crystal microbalance (QCM) humidity sensor was studied using an oscillating circuit method. The BiOCl powder was prepared by a hydrolysis method. Scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy were used to characterize the BiOCl sample. Its humidity-sensing property was analyzed by combining it with a QCM at room temperature (25 °C). Experimental results indicated that the BiOCl-based QCM sensor showed good humidity characteristics from 11.3 to 97.3%, such as good logarithmic frequency response to humidity levels (R 2 = 0.994), fast response time (5.2 s)/recovery time (4.5 s), good reversibility, stability, repeatability, and low humidity hysteresis. In addition, the response to human nose breaths showed excellent practicability. Finally, the humidity sensing mechanism of the BiOCl-based QCM humidity sensor was discussed in detail. This work demonstrates that BiOCl is a promising candidate material for humidity detection.
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Affiliation(s)
- Qiao Chen
- School
of Automation Engineering, University of
Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, Chengdu, Sichuan 611731, China
| | - Ning-bo Feng
- School
of Materials Science and Engineering, Xihua
University, No. 99 Jinzhou Road, Chengdu, Sichuan 610039, China
| | - Xian-he Huang
- School
of Automation Engineering, University of
Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, Chengdu, Sichuan 611731, China
| | - Yao Yao
- School
of Automation Engineering, University of
Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, Chengdu, Sichuan 611731, China
| | - Ying-rong Jin
- School
of Materials Science and Engineering, Xihua
University, No. 99 Jinzhou Road, Chengdu, Sichuan 610039, China
| | - Wei Pan
- School
of Automation Engineering, University of
Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, Chengdu, Sichuan 611731, China
| | - Dong Liu
- School
of Automation Engineering, University of
Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, Chengdu, Sichuan 611731, China
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15
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Santos MA, Marques L, Silva CDCC. Purification of graphene oxide dispersions by using a fluidic cell. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:3575-3581. [PMID: 32701077 DOI: 10.1039/d0ay00600a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The purification process of graphene oxide (GO) is a key stage in the production of this two-dimensional material by the Hummers method. This step demands a large amount of water, energy and time. The inefficient removal of the contaminants present in GO may affect its properties and make it unfeasible for some applications, such as in the field of biology. Here, we develop a simple and efficient method for the purification of an aqueous GO dispersion based on a fluidic diffusion cell system with a porous nitrocellulose membrane. The effectiveness of the fluidic diffusion cell system was compared with that of traditional purification methods, such as dialysis and centrifugation. The proposed strategy achieves the best performance in the removal of the major contaminants (K(aq.)+, Na(aq.)+, Cl(aq.)-, SO4(aq.)2-, Mn(aq.)2+ and MnO2(s)), demanding ∼95% less water than dialysis and in a shorter time (∼23 h). The system operates under flow conditions, with minimum handling by the operator and is able to select the GO flakes with bigger lateral dimensions. This work represents a simple and fast alternative for purification of GO dispersions that can be easily scaled-up.
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Affiliation(s)
- Marcos Alves Santos
- MackGraphe - Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, São Paulo, 01302-907, Brazil.
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16
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Mirabedini A, Ang A, Nikzad M, Fox B, Lau K, Hameed N. Evolving Strategies for Producing Multiscale Graphene-Enhanced Fiber-Reinforced Polymer Composites for Smart Structural Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1903501. [PMID: 32537406 PMCID: PMC7284224 DOI: 10.1002/advs.201903501] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 02/03/2020] [Accepted: 02/10/2020] [Indexed: 06/11/2023]
Abstract
Graphene has become an important research focus in many current fields of science including composite manufacturing. Developmental work in the field of graphene-enhanced composites has revealed several functional and structural characteristics that promise great benefits for their use in a broad range of applications. There has been much interest in the production of multiscale high-performance, lightweight, yet robust, multifunctional graphene-enhanced fiber-reinforced polymer (gFRP) composites. Although there are many reports that document performance enhancement in materials through the inclusion of graphene nanomaterials into a matrix, or its integration onto the reinforcing fiber component, only a few graphene-based products have actually made the transition to the marketplace. The primary focus of this work concerns the structural gFRPs and discussion on the corresponding manufacturing methodologies for the effective incorporation of graphene into these systems. Another important aspect of this work is to present recent results and highlight the excellent functional and structural properties of the resulting gFRP materials with a view to their future applications. Development of clear standards for the assessment of graphene material properties, improvement of existing materials and scalable manufacturing technologies, and specific regulations concerning human health and environmental safety are key factors to accelerate the successful commercialization of gFRPs.
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Affiliation(s)
- Azadeh Mirabedini
- Faculty of Science, Engineering and TechnologySwinburne University of TechnologyHawthornVIC3122Australia
- DMTC Limited (Australia)HawthornVIC3122Australia
| | - Andrew Ang
- Faculty of Science, Engineering and TechnologySwinburne University of TechnologyHawthornVIC3122Australia
| | - Mostafa Nikzad
- Faculty of Science, Engineering and TechnologySwinburne University of TechnologyHawthornVIC3122Australia
| | - Bronwyn Fox
- Faculty of Science, Engineering and TechnologySwinburne University of TechnologyHawthornVIC3122Australia
| | - Kin‐Tak Lau
- Faculty of Science, Engineering and TechnologySwinburne University of TechnologyHawthornVIC3122Australia
| | - Nishar Hameed
- Faculty of Science, Engineering and TechnologySwinburne University of TechnologyHawthornVIC3122Australia
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17
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Suarez-Diez M, Porras S, Laguna-Teno F, Schaap PJ, Tamayo-Ramos JA. Toxicological response of the model fungus Saccharomyces cerevisiae to different concentrations of commercial graphene nanoplatelets. Sci Rep 2020; 10:3232. [PMID: 32094381 PMCID: PMC7039959 DOI: 10.1038/s41598-020-60101-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 01/22/2020] [Indexed: 12/17/2022] Open
Abstract
Graphene nanomaterials have attracted a great interest during the last years for different applications, but their possible impact on different biological systems remains unclear. Here, an assessment to understand the toxicity of commercial polycarboxylate functionalized graphene nanoplatelets (GN) on the unicellular fungal model Saccharomyces cerevisiae was performed. While cell proliferation was not negatively affected even in the presence of 800 mg L-1 of the nanomaterial for 24 hours, oxidative stress was induced at a lower concentration (160 mg L-1), after short exposure periods (2 and 4 hours). No DNA damage was observed under a comet assay analysis under the studied conditions. In addition, to pinpoint the molecular mechanisms behind the early oxidative damage induced by GN and to identify possible toxicity pathways, the transcriptome of S. cerevisiae exposed to 160 and 800 mg L-1 of GN was studied. Both GN concentrations induced expression changes in a common group of genes (337), many of them related to the fungal response to reduce the nanoparticles toxicity and to maintain cell homeostasis. Also, a high number of genes were only differentially expressed in the GN800 condition (3254), indicating that high GN concentrations can induce severe changes in the physiological state of the yeast.
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Affiliation(s)
- Maria Suarez-Diez
- Laboratory of Systems and Synthetic Biology, Wageningen University & Research, Stippeneg, 4 6708WE, Wageningen, The Netherlands
| | - Santiago Porras
- Departamento de Economía Aplicada, University of Burgos, Plaza Infanta Doña Elena, s/n, 09001, Burgos, Spain
| | - Felix Laguna-Teno
- International Research Centre in Critical Raw Materials-ICCRAM, University of Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Peter J Schaap
- Laboratory of Systems and Synthetic Biology, Wageningen University & Research, Stippeneg, 4 6708WE, Wageningen, The Netherlands
| | - Juan A Tamayo-Ramos
- International Research Centre in Critical Raw Materials-ICCRAM, University of Burgos, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain.
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18
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Song W, Guo G, Wang J, Zhu Y, Zhang C, Fang H, Min C, Zhu S, Yuan X. In Vivo Reflection-Mode Photoacoustic Microscopy Enhanced by Plasmonic Sensing with an Acoustic Cavity. ACS Sens 2019; 4:2697-2705. [PMID: 31556602 DOI: 10.1021/acssensors.9b01126] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Relying on high-sensitivity refractive index sensing and a highly constrained evanescent field of surface plasmon resonance (SPR), broadband photoacoustic (PA) pressure transients were measured using an SPR sensor instead of routinely used piezoelectric ultrasonic transducers. An acoustic cavity made from stainless steel and having a designed ellipsoidal inner surface redirected laser-induced PA waves from the PA excitation spot to the SPR sensor. By incorporating the SPR sensor with the acoustic cavity, we developed optical-resolution photoacoustic microscopy (OR-PAM) with multiple advantages, including reflection-mode signal capture, improved PA detection sensitivity, increased PA spectral bandwidth as broad as ∼98 MHz, and micrometer-scale lateral resolution. This allowed label-free volumetric PA imaging of vasculature in not only the thin ear but also the thick forelimb of living mice. With these combined advantages, our OR-PAM system potentially offers more opportunities for biomedical investigation, for example, when studying microcirculations in the eye and cortex.
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Affiliation(s)
- Wei Song
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
| | - Guangdi Guo
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
| | - Jing Wang
- Xi’an Additive Manufacturing National Institute, Xi’an JiaoTong University, Xi’an 710049, China
| | - Yan Zhu
- School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia
| | - Chonglei Zhang
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
| | - Hui Fang
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
| | - Changjun Min
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
| | - Siwei Zhu
- Institute of Oncology, Tianjin Union Medical Centre, Tianjin 300121, China
| | - Xiaocong Yuan
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
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19
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Song W, Peng L, Guo G, Yang F, Zhu Y, Zhang C, Min C, Fang H, Zhu S, Yuan X. Isometrically Resolved Photoacoustic Microscopy Based on Broadband Surface Plasmon Resonance Ultrasound Sensing. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27378-27385. [PMID: 31267733 DOI: 10.1021/acsami.9b03164] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Photoacoustic microscopy (PAM) can measure optical absorption-based molecular specificities within tissues. Despite the diffraction-limited lateral resolution in optical-resolution photoacoustic microscopy (OR-PAM), the ongoing challenge is poor axial resolution because of an insufficient ultrasound detection bandwidth, which hampers PAM volumetric imaging. We propose polarization-differential surface plasmon resonance (SPR) sensing for broadband and high-sensitivity photoacoustic (PA) detection, allowing OR-PAM with comparable resolution along lateral and axial directions. This sensor possesses an estimated noise-equivalent-pressure sensitivity of ∼477 Pa over an approximately linear pressure response up to 107 kPa. Moreover, an improved PA detection bandwidth of ∼173 MHz permits an axial resolution (∼7.6 μm) that approaches the lateral resolution (∼4.5 μm) of our OR-PAM system. The capability in spatially isometric micrometer-scale resolution enables in vivo volumetric label-free imaging of the microvasculature of a mouse ear. The SPR sensing technology promises broader applications of PAM in biomedical studies such as microcirculation.
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Affiliation(s)
- Wei Song
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology , Shenzhen University , Shenzhen 518060 , China
| | - Liangliang Peng
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology , Shenzhen University , Shenzhen 518060 , China
| | - Guangdi Guo
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology , Shenzhen University , Shenzhen 518060 , China
| | - Fan Yang
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology , Shenzhen University , Shenzhen 518060 , China
| | - Yan Zhu
- School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia
| | - Chonglei Zhang
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology , Shenzhen University , Shenzhen 518060 , China
| | - Changjun Min
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology , Shenzhen University , Shenzhen 518060 , China
| | - Hui Fang
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology , Shenzhen University , Shenzhen 518060 , China
| | - Siwei Zhu
- Institute of Oncology, Tianjin Union Medical Centre , Tianjin 300121 , China
| | - Xiaocong Yuan
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology , Shenzhen University , Shenzhen 518060 , China
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20
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Abstract
Flexible sensors have the potential to be seamlessly applied to soft and irregularly shaped surfaces such as the human skin or textile fabrics. This benefits conformability dependant applications including smart tattoos, artificial skins and soft robotics. Consequently, materials and structures for innovative flexible sensors, as well as their integration into systems, continue to be in the spotlight of research. This review outlines the current state of flexible sensor technologies and the impact of material developments on this field. Special attention is given to strain, temperature, chemical, light and electropotential sensors, as well as their respective applications.
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21
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Wang K, Frewin CL, Esrafilzadeh D, Yu C, Wang C, Pancrazio JJ, Romero-Ortega M, Jalili R, Wallace G. High-Performance Graphene-Fiber-Based Neural Recording Microelectrodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1805867. [PMID: 30803072 DOI: 10.1002/adma.201805867] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 01/10/2019] [Indexed: 05/24/2023]
Abstract
Fabrication of flexible and free-standing graphene-fiber- (GF-) based microelectrode arrays with a thin platinum coating, acting as a current collector, results in a structure with low impedance, high surface area, and excellent electrochemical properties. This modification results in a strong synergistic effect between these two constituents leading to a robust and superior hybrid material with better performance than either graphene electrodes or Pt electrodes. The low impedance and porous structure of the GF results in an unrivalled charge injection capacity of 10.34 mC cm-2 with the ability to record and detect neuronal activity. Furthermore, the thin Pt layer transfers the collected signals along the microelectrode efficiently. In vivo studies show that microelectrodes implanted in the rat cerebral cortex can detect neuronal activity with remarkably high signal-to-noise ratio (SNR) of 9.2 dB in an area as small as an individual neuron.
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Affiliation(s)
- Kezhong Wang
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Christopher L Frewin
- Department of Bioengineering, University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Dorna Esrafilzadeh
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, NSW, 2031, Australia
| | - Changchun Yu
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Caiyun Wang
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Joseph J Pancrazio
- Department of Bioengineering, University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Mario Romero-Ortega
- Department of Bioengineering, University of Texas at Dallas, 800 W. Campbell Road, Richardson, TX, 75080, USA
| | - Rouhollah Jalili
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2031, Australia
| | - Gordon Wallace
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia
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