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Huang C, Huang L, Lin WF, Wu Y. Enhanced Proton Transport of β″-Al 2O 3 Modified by LiAlO 2 as a High-Performance Electrolyte for a Low-Temperature Solid Oxide Fuel Cell and an Electrolyzer. ACS Appl Mater Interfaces 2023; 15:38965-38974. [PMID: 37534730 DOI: 10.1021/acsami.3c07484] [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: 08/04/2023]
Abstract
β″-Al2O3 has been proven as a fast ionic conductor in solid batteries due to its unique structure. In this work, β″-Al2O3 was further modified by LiAlO2 and employed as the electrolyte material for low-temperature solid oxide fuel cells and electrolyzers, i.e., proton-conducting ceramic fuel cells and electrolysis cells, named as PCFC and PCEC, respectively. At 550 °C, thanks to this superior electrolyte with a remarkable conductivity of 0.161 S·cm-1, the PCFC reached a high power density up to 1029 mW·cm-2, and the PCEC demonstrated a significant current density of 1.49 A·cm-2 at a low operation voltage of 2.0 V. It has been found that the introduction of the LiAlO2 phase into β″-Al2O3 reduces the total impedance, while it increases the oxygen vacancy concentration and thus promotes the proton transport process with the reduced activation energy. This work provides a new approach for exploring two-dimensional materials with high-ionic conductivity that can be applied for solid oxide fuel cells and water electrolyzers and more wider power-to-X devices such as electrosynthesis for green ammonia production.
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Affiliation(s)
- Chen Huang
- Engineering Research Center of Nano-Geo Materials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
| | - Liwen Huang
- Engineering Research Center of Nano-Geo Materials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
| | - Wen-Feng Lin
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K
| | - Yan Wu
- Engineering Research Center of Nano-Geo Materials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China
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Li J, Zhang Y, Zhao H, Sui G. Preparation of 2D ZIF-L and Its Antibacterial and Antifouling Properties. Nanomaterials (Basel) 2023; 13:202. [PMID: 36616112 PMCID: PMC9824576 DOI: 10.3390/nano13010202] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/23/2022] [Accepted: 12/29/2022] [Indexed: 06/17/2023]
Abstract
The excessively leached metal ions from traditional metallic antimicrobial nanoparticles are harmful to biological and human tissues. Metal-organic frameworks (MOFs) coordinating bioactive metal ions to organic bridging ligands can potentially address this issue, avoiding the excessive leaching of metal ions and simultaneously exhibiting high effective antibacterial activities. Here, we report the preparation of a 2-dimensional leaves-like zeolitic imidazolate framework (ZIF-L) for potential antibacterial and anti-algae applications. The ZIF-L nanosheet exhibits complete inactivation of Escherichia coli (phosphate buffer saline: 4 h) and Bacillus subtilis (seawater: 0.5 h). The ZIF-L/epoxy composite has excellent antibacterial effect, poisoning effect and anti-adhesion effect on a variety of marine algae. It is worth noting that the removal rate (Escherichia coli) for ZIF/epoxy composite can be reached to 90.20% by only adding ZIF-L (0.25 wt%). This work will inspire researchers to develop more metal-organic frameworks materials for applications in the antibacterial and anti-algae fields.
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Affiliation(s)
- Jingyu Li
- Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Yang Zhang
- Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
| | - Haichao Zhao
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Guoxin Sui
- Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
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Mehmood R, Ahmad Z, Hussain MB, Athar M, Akbar G, Ajmal Z, Iqbal S, Razaq R, Ali MA, Qayum A, Chishti AN, Zaman FU, Shah R, Zaman S, Adnan. 2D-2D heterostructure g-C 3N 4-based materials for photocatalytic H 2 evolution: Progress and perspectives. Front Chem 2022; 10:1063288. [PMID: 36578353 PMCID: PMC9790992 DOI: 10.3389/fchem.2022.1063288] [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: 10/07/2022] [Accepted: 11/25/2022] [Indexed: 12/14/2022] Open
Abstract
Photocatalytic hydrogen generation from direct water splitting is recognized as a progressive and renewable energy producer. The secret to understanding this phenomenon is discovering an efficient photocatalyst that preferably uses sunlight energy. Two-dimensional (2D) graphitic carbon nitride (g-C3N4)-based materials are promising for photocatalytic water splitting due to special characteristics such as appropriate band gap, visible light active, ultra-high specific surface area, and abundantly exposed active sites. However, the inadequate photocatalytic activity of pure 2D layered g-C3N4-based materials is a massive challenge due to the quick recombination between photogenerated holes and electrons. Creating 2D heterogeneous photocatalysts is a cost-effective strategy for clean and renewable hydrogen production on a larger scale. The 2D g-C3N4-based heterostructure with the combined merits of each 2D component, which facilitate the rapid charge separation through the heterojunction effect on photocatalyst, has been evidenced to be very effective in enhancing the photocatalytic performance. To further improve the photocatalytic efficiency, the development of novel 2D g-C3N4-based heterostructure photocatalysts is critical. This mini-review covers the fundamental concepts, recent advancements, and applications in photocatalytic hydrogen production. Furthermore, the challenges and perspectives on 2D g-C3N4-based heterostructure photocatalysts demonstrate the future direction toward sustainability.
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Affiliation(s)
- Rashid Mehmood
- Institute of Chemical Sciences, Bahaudin Zakariya University, Multan, Pakistan,*Correspondence: Rashid Mehmood, ; Zia Ahmad,
| | - Zia Ahmad
- Department of Chemistry and Biochemistry, University of Agriculture, Faisalabad, Pakistan,*Correspondence: Rashid Mehmood, ; Zia Ahmad,
| | | | - Muhammad Athar
- Institute of Chemical Sciences, Bahaudin Zakariya University, Multan, Pakistan
| | - Ghulam Akbar
- Department of Chemistry and Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Zeeshan Ajmal
- Department of Soil and Environmental Science, University of Agriculture, Faisalabad, Pakistan
| | - Sikandar Iqbal
- ZJU-Hangzhou Global Technological and Innovation Center, Zhejiang University, Hangzhou, China
| | - Rameez Razaq
- Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Mohammad Arif Ali
- Institute of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Abdul Qayum
- Department of Chemistry, Shantou University, Shantou, China
| | - Aadil Nabi Chishti
- ZJU-Hangzhou Global Technological and Innovation Center, Zhejiang University, Hangzhou, China
| | - Fakhr uz Zaman
- School of Materials Science and Engineering, University of Jinan, Jinan, China
| | - Rahim Shah
- Institute of Chemical Sciences University of Swat, Swat, Khyber Pakhtunkhwa, Pakistan
| | - Shahid Zaman
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology (SUTech), Shenzhen, China
| | - Adnan
- Institute of Chemical Sciences University of Swat, Swat, Khyber Pakhtunkhwa, Pakistan
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Hu C, Chen J, Du E, Ju W, An Y, Gong SJ. Ferroelectric control of band alignments and magnetic properties in the two-dimensional multiferroic VSe 2/In 2Se 3. J Phys Condens Matter 2022; 34:425801. [PMID: 35878601 DOI: 10.1088/1361-648x/ac8406] [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: 05/03/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Our first-principles evidence shows that the two-dimensional (2D) multiferroic VSe2/In2Se3experiences continuous change of electronic structures, i.e. with the change of the ferroelectric (FE) polarization of In2Se3, the heterostructure can possess type-I, -II, and -III band alignments. When the FE polarization points from In2Se3to VSe2, the heterostructure has a type-III band alignment, and the charge transfer from In2Se3into VSe2induces half-metallicity. With reversal of the FE polarization, the heterostructure enters the type-I band alignment, and the spin-polarized current is turned off. When the In2Se3is depolarized, the heterostructure has a type-II band alignment. In addition, influence of the FE polarization on magnetism and magnetic anisotropy energy of VSe2was also analyzed, through which we reveal the interfacial magnetoelectric coupling effects. Our investigation about VSe2/In2Se3predicts its wide applications in the fields of both 2D spintronics and multiferroics.
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Affiliation(s)
- Chen Hu
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China
| | - Ju Chen
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China
| | - Erwei Du
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China
| | - Weiwei Ju
- College of Physics and Engineering and Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471023, People's Republic of China
| | - Yipeng An
- School of Physics and Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang 453007, People's Republic of China
| | - Shi-Jing Gong
- School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, People's Republic of China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China
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Zhang S, Fang N, Ji X, Gu Y, Xu Z, Jin S, Zhao Y. Dispersive 2D Triptycene-Based Crystalline Polymers: Influence of Regioisomerism on Crystallinity and Morphology. JACS Au 2022; 2:1638-1650. [PMID: 35911452 PMCID: PMC9326824 DOI: 10.1021/jacsau.2c00214] [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] [Indexed: 06/15/2023]
Abstract
The merging of good crystallinity and high dispersibility into two-dimensional (2D) layered crystalline polymers (CPs) still represents a challenge because a high crystallinity is often accompanied by intimate interlayer interactions that are detrimental to the material processibility. We herein report a strategy to address this dilemma using rationally designed three-dimensional (3D) monomers and regioisomerism-based morphology control. The as-synthesized CPs possess layered 2D structures, where the assembly of layers is stabilized by relatively weak van der Waals interactions between C-H bonds other than the usual π-π stackings. The morphology and dispersibility of the CPs are finely tuned via regioisomerism. These findings shed light on how to modulate the crystallinity, morphology, and ultimate function of crystalline polymers using the spatial arrangements of linking groups.
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Affiliation(s)
- Siquan Zhang
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Nie Fang
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Xiaonan Ji
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Yuefei Gu
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Zhenchuang Xu
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Shangbin Jin
- School
of Chemical Engineering and Technology, Xi’an Jiaotong University, Xianning West Road, Xi’an, Shaanxi 710049, China
| | - Yanchuan Zhao
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
- Key
Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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Elattar A, Li W, Suzuki H, Kambe T, Nishikawa T, Kyaw AKK, Hayashi Y. Single Crystals of Mixed-Cation Copper-Based Perovskite with Trimodal Bandgap Behavior. Chemistry 2022; 28:e202104316. [PMID: 35253943 DOI: 10.1002/chem.202104316] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 12/02/2021] [Indexed: 01/08/2023]
Abstract
Two-dimensional (2D) hybrid perovskites with novel functionalities and structural diversity are a perfect platform for emerging optoelectronic devices such as photodetectors, light-emitting diodes, and solar cells. Here, we demonstrate that excess concentration of Cesium bromide (CsBr) is key to the formation of easily exfoliated 2D Cs2 Cu(Cl/Br)4 perovskite crystal. Furthermore, by employing this trick to 2D perovskite MA2 Cu(Cl/Br)4 (MA=methylammonium), we achieve a phase-pure easily exfoliated 2D mixed-cation (MA/Cs)2 Cu(Cl/Br)4 perovskite crystal, which exhibits reduced bandgap (1.53 eV) with ferromagnetic behavior and photovoltaic property. The resultant mixed-cation structured device reveals enhanced efficiency compared to all MA and all Cs counterparts. These findings demonstrate the importance of cation-engineering in developing innovative materials with novel properties.
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Affiliation(s)
- Amr Elattar
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan.,Department of Chemistry, Faculty of Science, Ain Shams University, 11566, Cairo, Egypt
| | - Wenhui Li
- Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting and Department of Electrical & Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Hiroo Suzuki
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
| | - Takashi Kambe
- Department of Physics, Okayama University, Okayama, 700-8530, Japan
| | - Takeshi Nishikawa
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
| | - Aung Ko Ko Kyaw
- Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting and Department of Electrical & Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.,Shenzhen Planck Innovation Technology Co., Ltd, No. 8, Liuhe Road, Longgang District, Shenzhen, 518100, Guangdong, P. R. China
| | - Yasuhiko Hayashi
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
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Zhang S, Huang Z, Cai L, Zhang W, Ding H, Zhang L, Chen Y. Three-dimensional versus two-dimensional video-assisted hepatectomy for liver disease: a meta-analysis of clinical data. Wideochir Inne Tech Maloinwazyjne 2021; 16:1-9. [PMID: 33786111 DOI: 10.5114/wiitm.2020.100678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/04/2020] [Indexed: 12/21/2022] Open
Abstract
Introduction The benefit of three-dimensional (3D) visualization for liver disease is uncertain. Aim To evaluate the effectiveness and safety of 3D versus two-dimensional (2D) video-assisted hepatectomy for LD. Material and methods We searched PubMed, Embase, Cochrane Library, Medline, and Web of Science for studies addressing 3D versus 2D for 2D until 30 February 2020. Study-specific effect sizes and their 95% confidence intervals (CIs) were combined to calculate the pooled value using a fixed-effects or random-effects model. Results Nine studies with 808 patients were included. The 3D group had shorter operative time (mean difference (MD) = 34.39; 95% CI = 59.50, 9.28), experienced less intraoperative blood loss (MD = 106.55; 95% CI = 183.76, 29.34), and a smaller blood transfusion volume (MD = 88.25; 95% CI = 141.26, 35.24). The 3D group had a smaller difference between the predicted volume and the actual resected volume (MD = 103.25; 95% CI = 173.24, 33.26) and a lower rate of postoperative complications (odds ratio (OR) = 0.57; 95% CI: 0.35, 0.91). Conclusions During surgery, 3D video-assisted hepatectomy could effectively reduce operative time, intraoperative bleeding, and blood transfusion volume, and had a smaller difference between the predicted volume and the actual resected volume and a lower rate of postoperative complications. More high-quality randomized controlled trials are required to verify the reliability and validity of our conclusion.
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Alalfy M, Osman OM, Salama S, Lasheen Y, Soliman M, Fikry M, Ramadan M, Alaa D, Elshemy S, Abdella R. Evaluation of the Cesarean Scar Niche In Women With Secondary Infertility Undergoing ICSI Using 2D Sonohysterography Versus 3D Sonohysterography and Setting a Standard Criteria; Alalfy Simple Rules for Scar Assessment by Ultrasound To Prevent Health Problems for Women. Int J Womens Health 2020; 12:965-974. [PMID: 33177887 PMCID: PMC7650036 DOI: 10.2147/ijwh.s267691] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 09/07/2020] [Indexed: 11/30/2022] Open
Abstract
Background Many expressions were used to define the defect that is seen by ultrasound after cesarean section (CS) namely scar defect, niche, isthmocele, uterine pouch or diverticula. Objective To compare the accuracy of 2 dimensional sonohysterography (2D SHG) to 3 dimensional sonohysterography (3D SHG) in evaluating cesarean section uterine scar depth (D), base width (BW), width (W) and residual myometrial thickness (RMT) in women with secondary infertility and establishment of a standard criteria; Alalfy simple rules for scar assessment. Patients and Methods This was an observational cross-sectional comparative study that was conducted on women who presented with secondary infertility and were candidates for intracytoplasmic sperm injection (ICSI) and giving a history of a previous cesarean section. Assessment of uterine scar in each woman was performed using 2D transvaginal ultrasound with sonohysterography (SHG) followed by 3D transvaginal with SHG with evaluation of niche depth, width, RMT, niche BW and RMT/depth ratio. The study was conducted at Algezeera hospital, Egypt. Results The present study revealed that 3D ultrasound with SHG is superior in evaluation of the RMT and niche width prior to ICSI providing better characterization of the scar niche. Conclusion Scar niche should be assessed by a combined integrated 2D SHG and 3D SHG scan with the specific geometrical and anatomical considerations, Alalfy simple rules for scar niche assessment that involvemeasurement of niche depth, (Base width) BW, width, RMT and RMT/depth ratio in sagittal plane, RMT in coronal plane / niche width in coronal plane ratio (ratio less than 1 denotes scar weakness with more liability for dehiscence). Trial Registration Clinical Trials.gov Id NCT04076904.
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Affiliation(s)
- Mahmoud Alalfy
- Reproductive Health and Family Planning Department, National Research Centre, Dokki, Cairo, Egypt
| | - Omneya M Osman
- Obstetrics and Gynecology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Egypt, Algezeera Hospital, Egypt
| | - Sameh Salama
- Reproductive Health and Family Planning Department, National Research Centre, Dokki, Cairo, Egypt
| | - Yossra Lasheen
- Obstetrics and Gynecology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Egypt, Algezeera Hospital, Egypt
| | - Mahmoud Soliman
- Obstetrics and Gynecology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Egypt, Algezeera Hospital, Egypt
| | - Mohamed Fikry
- Obstetrics and Gynecology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Egypt, Algezeera Hospital, Egypt
| | - Mohamed Ramadan
- Obstetrics and Gynecology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Egypt, Algezeera Hospital, Egypt
| | - Doaaa Alaa
- Obstetrics and Gynecology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Egypt, Algezeera Hospital, Egypt
| | - Shaimaa Elshemy
- Obstetrics and Gynecology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Egypt, Algezeera Hospital, Egypt
| | - Rana Abdella
- Obstetrics and Gynecology Department, Kasr Alainy, Faculty of Medicine, Cairo University, Egypt, Algezeera Hospital, Egypt
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Jung JW, Je H, Lee SK, Jang Y, Choi J. Two-Dimensional Shear Wave Elastography of Normal Soft Tissue Organs in Adult Beagle Dogs; Interobserver Agreement and Sources of Variability. Front Bioeng Biotechnol 2020; 8:979. [PMID: 32974311 PMCID: PMC7466577 DOI: 10.3389/fbioe.2020.00979] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 04/28/2020] [Accepted: 07/27/2020] [Indexed: 12/21/2022] Open
Abstract
Shear wave elastography (SWE) induces lateral shear wave through acoustic pulses of the transducer and evaluates tissue stiffness quantitatively. This study was performed to evaluate feasibility and reproducibility of two-dimensional shear wave elastography (2D SWE) for evaluation of tissue stiffness and to examine technical factors that affect shear wave speed (SWS) measurements in adult dogs. Nine healthy, 2 year-old, adult beagles with the median weight of 9.8 kg were included. In this prospective, experimental, exploratory study, 2D SWE (Aplio 600) from the liver, spleen, kidneys, pancreas, prostate, lymph nodes (submandibular, retropharyngeal, axillary, medial iliac, and inguinal), submandibular salivary gland, and thyroid was performed in anesthetized beagles. Color map was drawn and SWS of each SWE were measured as Young’s modulus (kPa) and shear wave velocity (m/s). The effect of measuring site, scan approach, depth, and anesthesia on SWE was assessed in abdominal organs by two observers independently. A total of 27 SWE examinations were performed in 12 organs by each observer. All SWS measurements were preformed successfully; however, SWE in the renal medulla could not be successfully conducted, and it was excluded from further analysis. Interobserver agreement of SWE was moderate to excellent in all organs, except for the left liver lobe at 10–15 mm depth with the intercostal scan. In the liver, there was no significant effect of the measuring site and scan approach on SWE. SWS of the liver and spleen tended to be higher with increasing the depth, but no significant difference. However, anesthesia significantly increased tissue stiffness in the spleen compared to awake dog regardless of the depth (P < 0.05). There was a significant difference in SWS according to the measuring site in the kidneys and pancreas (P < 0.001). 2D SWE was feasible and highly reproducible for the estimation of tissue stiffness in dogs. Measuring site and anesthesia are sources of variability affecting SWE in abdominal organs. Therefore, these factors should be considered during SWS measurement in 2D SWE. This study provides basic data for further studies on 2D SWE on pathological conditions that may increase tissue stiffness in dogs.
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Affiliation(s)
- Jin-Woo Jung
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, South Korea
| | - Hyejin Je
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, South Korea
| | - Sang-Kwon Lee
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, South Korea
| | - Youjung Jang
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, South Korea
| | - Jihye Choi
- College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, South Korea
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Zhang R, Qin Y, Liu P, Jia C, Tang Y, Wang H. How does Molybdenum Disulfide Store Charge: A Minireview. ChemSusChem 2020; 13:1354-1365. [PMID: 32017468 DOI: 10.1002/cssc.201903320] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Indexed: 06/10/2023]
Abstract
MoS2 has attracted tremendous attention as a promising electrode material for rechargeable alkali metal ion (Li+ , Na+ , K+ ) batteries due to its high capacity and low cost. However, the practical application of MoS2 for energy storage has not been achieved yet, which is restricted by its intrinsic charge-storage behavior. Debates still exist in this field although great efforts have been made to reveal alkali metal ion (Li+ , Na+ , K+ ) storage mechanism of MoS2 . This Minireview aims to provide an analysis and summary of the related phase conversion, structure collapse, and loss of active material in a MoS2 electrode during the intercalation/extraction process of alkali metal ions. Hence, the fundamental understanding about the charge storage in MoS2 is of importance for the rational design of MoS2 electrodes with excellent electrochemical performance.
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Affiliation(s)
- Rui Zhang
- Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P.R. China
| | - Yao Qin
- Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P.R. China
| | - Ping Liu
- Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P.R. China
| | - Chuankun Jia
- College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, 410114, P.R. China
| | - Yougen Tang
- Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P.R. China
| | - Haiyan Wang
- Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P.R. China
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Abstract
Two dimensional conductive metal-organic frameworks (2D cMOFs) have been widely applied as electrocatalysts, electronic devices, and sensors. In addition, their intrinsic electronic properties could be efficiently tuned via varying the conjugated linkers. Herein, we report a novel 2D cMOF based on complexation of 2,3,7,8,12,13-hexahydroxyl truxene and copper ions via the energy economical interfacial reaction. This 2D cMOF was obtained as a brilliant black powder and showed a bulk electrical conductivity of 3.5 × 10-3 S cm-1 at 30 °C. Additionally, the cMOF-modified glassy carbon electrode could act as an electrochemical sensor for sensing paraquat with a limit of detection at 4.1 × 10-8 M (S/N = 3). The accession of truxene-Cu to the cMOF family would shed new light on the impact of the organic conjugated linker and broaden the scope of cMOFs' applications.
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Affiliation(s)
- Qian Zhao
- Institute of Molecular Plus , Tianjin University , Weijin Rd. 92 , Tianjin 300072 , P. R. China
| | - Sheng-Hua Li
- College of Chemical Engineering and Materials Science , Tianjin University of Science & Technology , Tianjin 300457 , P. R. China
| | - Rui-Lin Chai
- College of Chemical Engineering and Materials Science , Tianjin University of Science & Technology , Tianjin 300457 , P. R. China
| | - Xv Ren
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science , Tianjin University , Weijin Rd. 92 , Tianjin 300072 , P. R. China
| | - Chun Zhang
- Institute of Molecular Plus , Tianjin University , Weijin Rd. 92 , Tianjin 300072 , P. R. China
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12
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Rahman F, Zavabeti A, Rahman MA, Arash A, Mazumder A, Walia S, Sriram S, Bhaskaran M, Balendhran S. Dual Selective Gas Sensing Characteristics of 2D α-MoO 3-x via a Facile Transfer Process. ACS Appl Mater Interfaces 2019; 11:40189-40195. [PMID: 31590483 DOI: 10.1021/acsami.9b11311] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Metal oxide-based gas sensor technology is promising due to their practical applications in toxic and hazardous gas detection. Orthorhombic α-MoO3 is a planar metal oxide with a unique layered structure, which can be obtained in a two-dimensional (2D) form. In the 2D form, the larger surface area-to-volume ratio of the material facilitates significantly higher interaction with gas molecules while exhibiting exceptional transport properties. The presence of oxygen vacancies results in nonstoichiometric MoO3 (MoO3-x), which further enhances the charge carrier mobility. Here, we study dual gas sensing characteristics and mechanism of 2D α-MoO3-x. Herein, conductometric dual gas sensors based on chemical vapor deposited 2D α-MoO3-x are developed and demonstrated. A facile transfer process is established to integrate the material into any arbitrary substrate. The sensors show high selectivity toward NO2 and H2S gases with response and recovery rates of 295.0 and 276.0 kΩ/s toward NO2 and 28.5 and 48.0 kΩ/s toward H2S, respectively. These gas sensors also show excellent cyclic endurance with a variation in ΔR ∼ 112 ± 1.64 and 19.5 ± 1.13 MΩ for NO2 and H2S, respectively. As such, this work presents the viability of planar 2D α-MoO3-x as a dual selective gas sensor.
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13
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Tong Y, Guo Y, Mu K, Shan H, Dai J, Liu Y, Sun Z, Zhao A, Zeng XC, Wu C, Xie Y. Half-Metallic Behavior in 2D Transition Metal Dichalcogenides Nanosheets by Dual-Native-Defects Engineering. Adv Mater 2017; 29:1703123. [PMID: 28861927 DOI: 10.1002/adma.201703123] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 07/30/2017] [Indexed: 06/07/2023]
Abstract
Two-dimensional transition metal dichalcogenides (TMDs) have been regarded as one of the best nonartificial low-dimensional building blocks for developing spintronic nanodevices. However, the lack of spin polarization in the vicinity of the Fermi surface and local magnetic moment in pristine TMDs has greatly hampered the exploitation of magnetotransport properties. Herein, a half-metallic structure of TMDs is successfully developed by a simple chemical defect-engineering strategy. Dual native defects decorate titanium diselenides with the coexistence of metal-Ti-atom incorporation and Se-anion defects, resulting in a high-spin-polarized current and local magnetic moment of 2D Ti-based TMDs toward half-metallic room-temperature ferromagnetism character. Arising from spin-polarization transport, the as-obtained T-TiSe1.8 nanosheets exhibit a large negative magnetoresistance phenomenon with a value of -40% (5T, 10 K), representing one of the highest negative magnetoresistance effects among TMDs. It is anticipated that this dual regulation strategy will be a powerful tool for optimizing the intrinsic physical properties of TMD systems.
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Affiliation(s)
- Yun Tong
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yuqiao Guo
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Kejun Mu
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Huan Shan
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Jun Dai
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Yi Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Zhe Sun
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Aidi Zhao
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Xiao Cheng Zeng
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Changzheng Wu
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Science at the Microscale, CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
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14
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Zhukovskyi M, Plashnitsa V, Petchsang N, Ruth A, Bajpai A, Vietmeyer F, Wang Y, Brennan M, Pang Y, Werellapatha K, Bunker B, Chattopadhyay S, Luo T, Janko B, Fay P, Kuno M. Molybdenum Carbamate Nanosheets as a New Class of Potential Phase Change Materials. Nano Lett 2017; 17:3902-3906. [PMID: 28510441 DOI: 10.1021/acs.nanolett.7b01464] [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: 06/07/2023]
Abstract
We report for the first time the synthesis of large, free-standing, Mo2O2(μ-S)2(Et2dtc)2 (MoDTC) nanosheets (NSs), which exhibit an electron-beam induced crystalline-to-amorphous phase transition. Both electron beam ionization and femtosecond (fs) optical excitation induce the phase transition, which is size-, morphology-, and composition-preserving. Resulting NSs are the largest, free-standing regularly shaped two-dimensional amorphous nanostructures made to date. More importantly, amorphization is accompanied by dramatic changes to the NS electrical and optical response wherein resulting amorphous species exhibit room-temperature conductivities 5 orders of magnitude larger than those of their crystalline counterparts. This enhancement likely stems from the amorphization-induced formation of sulfur vacancy-related defects and is supported by temperature-dependent transport measurements, which reveal efficient variable range hopping. MoDTC NSs represent one instance of a broader class of transition metal carbamates likely having applications because of their intriguing electrical properties as well as demonstrated ability to toggle metal oxidation states.
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Affiliation(s)
- Maksym Zhukovskyi
- Department of Chemistry and Biochemistry, University of Notre Dame , 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Vladimir Plashnitsa
- Department of Chemistry and Biochemistry, University of Notre Dame , 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Nattasamon Petchsang
- Department of Materials Science, Faculty of Science, Kasetsart University , 50 Ngam Wong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand
| | - Anthony Ruth
- Department of Physics, University of Notre Dame , 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Anshumaan Bajpai
- Department of Chemistry and Biochemistry, University of Notre Dame , 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Felix Vietmeyer
- Department of Chemistry and Biochemistry, University of Notre Dame , 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Yuanxing Wang
- Department of Chemistry and Biochemistry, University of Notre Dame , 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Michael Brennan
- Department of Chemistry and Biochemistry, University of Notre Dame , 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Yunsong Pang
- Department of Aerospace and Mechanical Engineering, University of Notre Dame , 371 Fitzpatrick Hall, Notre Dame, Indiana 46556, United States
| | - Kalpani Werellapatha
- Department of Physics, University of Notre Dame , 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Bruce Bunker
- Department of Physics, University of Notre Dame , 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Soma Chattopadhyay
- CSRRI- Sector 10 ID, Advanced Photon Source , 9700 S. Cass Avenue, Building 401, Lemont, Illinois 60439, United States
| | - Tengfei Luo
- Department of Aerospace and Mechanical Engineering, University of Notre Dame , 371 Fitzpatrick Hall, Notre Dame, Indiana 46556, United States
| | - Boldizsar Janko
- Department of Physics, University of Notre Dame , 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Patrick Fay
- Department of Electrical Engineering, University of Notre Dame , 275 Fitzpatrick Hall, Notre Dame, Indiana 46556, United States
| | - Masaru Kuno
- Department of Chemistry and Biochemistry, University of Notre Dame , 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
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15
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Yammine K, Violato C. A meta-analysis of the educational effectiveness of three-dimensional visualization technologies in teaching anatomy. Anat Sci Educ 2015; 8:525-38. [PMID: 25557582 DOI: 10.1002/ase.1510] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 09/12/2014] [Accepted: 12/04/2014] [Indexed: 05/16/2023]
Abstract
Many medical graduates are deficient in anatomy knowledge and perhaps below the standards for safe medical practice. Three-dimensional visualization technology (3DVT) has been advanced as a promising tool to enhance anatomy knowledge. The purpose of this review is to conduct a meta-analysis of the effectiveness of 3DVT in teaching and learning anatomy compared to all teaching methods. The primary outcomes were scores of anatomy knowledge tests expressed as factual or spatial knowledge percentage means. Secondary outcomes were perception scores of the learners. Thirty-six studies met the inclusion criteria including 28 (78%) randomized studies. Based on 2,226 participants including 2,128 from studies with comparison groups, 3DVTs (1) resulted in higher (d = 0.30, 95%CI: 0.02-0.62) factual knowledge, (2) yielded significant better results (d = 0.50, 95%CI: 0.20-0.80) in spatial knowledge acquisition, and (3) produced significant increase in user satisfaction (d = 0.28, 95%CI = 0.12-0.44) and in learners' perception of the effectiveness of the learning tool (d = 0.28, 95%CI = 0.14-0.43). The total mean scores (out of five) and ±SDs for QUESTS's Quality and Strength dimensions were 4.38 (±SD 1.3) and 3.3 (±SD 1.7), respectively. The results have high internal validity, for the improved outcomes of 3DVTs compared to other methods of anatomy teaching. Given that anatomy teaching and learning in the modern medical school appears to be approaching a crisis, 3DVT can be a potential solution to the problem of inadequate anatomy pedagogy.
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Affiliation(s)
- Kaissar Yammine
- Foot and Hand Clinic, Emirates Hospital, Dubai, United Arab Emirates
- Center for Evidence-Based Sports and Orthopedic Research, Emirates Hospital, Dubai
| | - Claudio Violato
- Department of Medical Education, University Ambrosiana, Free University of Milan, Milan, Italy
- Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, North Carolina
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16
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Ozturk B, de-Luna-Bugallo A, Panaitescu E, Chiaramonti AN, Liu F, Vargas A, Jiang X, Kharche N, Yavuzcetin O, Alnaji M, Ford MJ, Lok J, Zhao Y, King N, Dhar NK, Dubey M, Nayak SK, Sridhar S, Kar S. Atomically thin layers of B-N-C-O with tunable composition. Sci Adv 2015; 1:e1500094. [PMID: 26601211 PMCID: PMC4646774 DOI: 10.1126/sciadv.1500094] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 05/14/2015] [Indexed: 06/02/2023]
Abstract
In recent times, atomically thin alloys of boron, nitrogen, and carbon have generated significant excitement as a composition-tunable two-dimensional (2D) material that demonstrates rich physics as well as application potentials. The possibility of tunably incorporating oxygen, a group VI element, into the honeycomb sp(2)-type 2D-BNC lattice is an intriguing idea from both fundamental and applied perspectives. We present the first report on an atomically thin quaternary alloy of boron, nitrogen, carbon, and oxygen (2D-BNCO). Our experiments suggest, and density functional theory (DFT) calculations corroborate, stable configurations of a honeycomb 2D-BNCO lattice. We observe micrometer-scale 2D-BNCO domains within a graphene-rich 2D-BNC matrix, and are able to control the area coverage and relative composition of these domains by varying the oxygen content in the growth setup. Macroscopic samples comprising 2D-BNCO domains in a graphene-rich 2D-BNC matrix show graphene-like gate-modulated electronic transport with mobility exceeding 500 cm(2) V(-1) s(-1), and Arrhenius-like activated temperature dependence. Spin-polarized DFT calculations for nanoscale 2D-BNCO patches predict magnetic ground states originating from the B atoms closest to the O atoms and sizable (0.6 eV < E g < 0.8 eV) band gaps in their density of states. These results suggest that 2D-BNCO with novel electronic and magnetic properties have great potential for nanoelectronics and spintronic applications in an atomically thin platform.
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Affiliation(s)
- Birol Ozturk
- Department of Physics, Northeastern University, Boston, MA 02115, USA
- Electronic Materials Research Institute, Northeastern University, Boston, MA 02115, USA
- Department of Physics and Engineering Physics, Morgan State University, Baltimore, MD 21251, USA
| | - Andres de-Luna-Bugallo
- Department of Physics, Northeastern University, Boston, MA 02115, USA
- Cinvestav Unidad Querétaro, Querétaro, Qro. 76230, Mexico
| | - Eugen Panaitescu
- Department of Physics, Northeastern University, Boston, MA 02115, USA
| | | | - Fangze Liu
- Department of Physics, Northeastern University, Boston, MA 02115, USA
| | - Anthony Vargas
- Department of Physics, Northeastern University, Boston, MA 02115, USA
| | - Xueping Jiang
- Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Neerav Kharche
- Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Ozgur Yavuzcetin
- Department of Physics, University of Wisconsin–Whitewater, Whitewater, WI 53190, USA
| | - Majed Alnaji
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, USA
| | - Matthew J. Ford
- Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA
| | - Jay Lok
- College of Computer and Information Science, Northeastern University, Boston, MA 02115, USA
| | - Yongyi Zhao
- Department of Physics, Northeastern University, Boston, MA 02115, USA
| | - Nicholas King
- Department of Physics, Northeastern University, Boston, MA 02115, USA
| | - Nibir K. Dhar
- Night Visions Electronic Sensors Directorate, Fort Belvoir, VA 22060, USA
| | - Madan Dubey
- Sensors and Electron Devices Directorate, U.S. Army Research Laboratory, Adelphi, MD 20783, USA
| | - Saroj K. Nayak
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Odisha 751013, India
| | - Srinivas Sridhar
- Department of Physics, Northeastern University, Boston, MA 02115, USA
- Electronic Materials Research Institute, Northeastern University, Boston, MA 02115, USA
| | - Swastik Kar
- Department of Physics, Northeastern University, Boston, MA 02115, USA
- George J. Kostas Research Institute for Homeland Security, Northeastern University, Burlington, MA 01803, USA
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17
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Abstract
Novel two-dimensional (2D) porous metal oxides with micro-/nanoarchitecture have been successfully fabricated using graphene oxide (GO) as a typical sacrificial template. GO as a 2D template ensures that the growth and fusion of metal oxides nanoparticles is restricted in the 2D plane. A series of metal oxides (NiO, Fe2O3, Co3O4, Mn2O3, and NiFe2O4) with similar nanostructure were investigated using this simple method. Some of these special nanostructured materials, such as NiO, when being used as anode for lithium-ion batteries, can exhibit high specific capacity, good rate performance, and cycling stability. Importantly, this strategy of creating a 2D porous micro/nano architecture can be easily extended to controllably synthesize other binary/polynary metal oxides nanostructures for lithium-ion batteries or other applications.
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Affiliation(s)
- Hailiang Cao
- Advanced Li-ion Battery Engineering Lab, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Zhejiang, 315201, China
| | - Xufeng Zhou
- Advanced Li-ion Battery Engineering Lab, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Zhejiang, 315201, China
| | - Chao Zheng
- Advanced Li-ion Battery Engineering Lab, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Zhejiang, 315201, China
| | - Zhaoping Liu
- Advanced Li-ion Battery Engineering Lab, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Zhejiang, 315201, China
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18
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Utrilla-Layna J, Alcázar JL, Aubá M, Laparte C, Olartecoechea B, Errasti T, Juez L, Mínguez JÁ, Guerriero S, Jurado M. Performance of three-dimensional power Doppler angiography as third-step assessment in differential diagnosis of adnexal masses. Ultrasound Obstet Gynecol 2015; 45:613-617. [PMID: 25270368 DOI: 10.1002/uog.14674] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 09/12/2014] [Accepted: 09/16/2014] [Indexed: 06/03/2023]
Abstract
OBJECTIVE To evaluate the contribution of three-dimensional (3D) power Doppler angiography (3D-PDA) to the differential diagnosis of adnexal masses. METHODS This was a prospective study in women diagnosed with a persistent adnexal mass and subsequently scheduled for surgery in a tertiary university hospital. All women were evaluated by transvaginal/transrectal ultrasound according to a predetermined three-step protocol, with transabdominal ultrasound being performed in some cases. First, morphological evaluation of the mass was performed using gray-scale 'pattern recognition' (first step). Lesions diagnosed as having a benign pattern were considered as being at low risk of malignancy whereas tumors with solid components, ascites and/or signs of carcinomatosis were considered as being at high risk of malignancy. In both cases no further test was performed and a decision regarding clinical management, either for follow-up or surgery, was taken. Tumors with solid components but without signs of ascites or carcinomatosis were considered as being at intermediate risk of malignancy. These lesions were assessed by two-dimensional (2D) PDA to evaluate tumor vascularity (color score) (second step). Solid tumors with a color score of 1 or 2 were considered as benign and no further test was performed, while tumors with a color score of 2, 3 or 4 within solid components or a color score of 3 or 4 in the case of a solid tumor were considered as malignant. The latter group underwent 3D-PDA assessment (third step). Vascularization index (VI) was calculated in a 1-mL sphere of the most vascularized area of the tumor. When a VI ≥ 24.015% was found, the tumor was considered as malignant. All masses were removed surgically and definitive histological diagnosis was used as the gold standard. Sensitivity and specificity for each strategy were calculated and compared. In the case of bilateral tumors, only the more suspicious one was used for analysis. RESULTS A total of 367 adnexal masses diagnosed in 367 women (mean age, 46.5 (range, 18-80) years) were evaluated during the study period. Of these, 86 masses were malignant and 281 were benign. The sensitivity and specificity for each assessment strategy were as follows: one-step, 97.7% and 78.6%; two-step, 94.2% and 97.9% (P < 0.001 for specificity when compared with that of one-step); three-step, 90.7% and 98.9% (not statistically significant when compared with that of two-step). CONCLUSIONS The addition of 2D-PDA in the differential diagnosis of an adnexal mass significantly increases specificity while sensitivity remains high; however performing subsequent 3D-PDA does not provide additional information or further improve diagnostic performance subsequent to 2D-PDA.
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Affiliation(s)
- J Utrilla-Layna
- Department of Obstetrics and Gynecology, Clinica Universidad de Navarra, School of Medicine, Pamplona, Spain
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19
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Liu K, Xie P, Peng W, Zhou Z. Magnetic resonance cholangiopancreatography: Comparison of two- and three-dimensional sequences for the assessment of pancreatic cystic lesions. Oncol Lett 2015; 9:1917-1921. [PMID: 25789068 PMCID: PMC4356376 DOI: 10.3892/ol.2015.2935] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Accepted: 12/19/2014] [Indexed: 12/30/2022] Open
Abstract
The present study aimed to compare two-dimensional (2D) and three-dimensional (3D) magnetic resonance cholangiopancreatography (MRCP) for the assessment of pancreatic cystic lesions. Between February 2009 and December 2011, 35 patients that had been diagnosed with pancreatic cystic lesions, which was confirmed by surgery and pathology, underwent pre-operative 2D or 3D MRCP for pre-operative evaluation. In the present study, the quality of these 2D and 3D MRCP images, the visualization of the features of the cystic lesions, visualization of the pancreatic main duct and prediction of ductal communication with the cystic lesions were evaluated and compared using statistical software. The 3D MRCP images were determined to be of higher quality compared with the 2D MRCP images. The features of the cystic lesions were visualized better on 3D MRCP compared with 2D MRCP. The same capability for the visualization of the segment of the pancreatic main duct was exhibited by 3D and 2D MRCP. There was no significant difference between the area under the receiver operating characteristic curve values of 2D and 3D MRCP, which assessed the prediction of communication between cystic lesions and the pancreatic main duct. It was concluded that, compared with 2D MRCP, 3D MRCP provides an improved assessment of pancreatic cystic lesions, but does not exhibit an improved capability for the visualization of the pancreatic main duct or for the prediction of communication between cystic lesions and the pancreatic main duct.
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Affiliation(s)
- Kefu Liu
- Department of Radiology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215008, P.R. China ; Department of Radiology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, P.R. China
| | - Ping Xie
- Department of Radiology, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215008, P.R. China
| | - Weijun Peng
- Department of Radiology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, P.R. China ; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, P.R. China
| | - Zhengrong Zhou
- Department of Radiology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, P.R. China ; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, P.R. China
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20
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Koutsogiannidis CP, Ananiadou O, Kapsas G, Madesis A, Palladas P, Drossos G. 'Early' post-cardiotomy chylopericardium and the imaging value of magnetic resonance thoracic-ductography. Heart Lung Circ 2013; 22:1033-5. [PMID: 24314895 DOI: 10.1016/j.hlc.2013.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 10/14/2012] [Revised: 03/21/2013] [Accepted: 04/07/2013] [Indexed: 11/25/2022]
Abstract
Isolated chylopericardium is a rare postoperative complication after cardiac surgery. A delay in diagnosis or an inappropriate management can lead to serious consequences. The treatment, which may either be conservative or surgical, is controversial and it depends on the duration and volume of effusion. We report a case of chylopericardium after atrial septal defect repair in a young woman. The patient was treated initially with total parenteral nutrition for 10 days. After drainage diminished, low fat diet containing medium chain triglyceride was instituted. Postoperatively, the role of magnetic resonance thoracic ductography was important for the assessment of the treatment strategy.
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21
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Ramadan S, Lin A, Stanwell P. Glutamate and glutamine: a review of in vivo MRS in the human brain. NMR Biomed 2013; 26:1630-46. [PMID: 24123328 PMCID: PMC3849600 DOI: 10.1002/nbm.3045] [Citation(s) in RCA: 179] [Impact Index Per Article: 16.3] [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: 06/25/2012] [Revised: 08/08/2013] [Accepted: 09/08/2013] [Indexed: 05/21/2023]
Abstract
Our understanding of the roles that the amino acids glutamate (Glu) and glutamine (Gln) play in the mammalian central nervous system has increased rapidly in recent times. Many conditions are known to exhibit a disturbance in Glu-Gln equilibrium, and the exact relationships between these changed conditions and these amino acids are not fully understood. This has led to increased interest in Glu/Gln quantitation in the human brain in an array of conditions (e.g. mental illness, tumor, neuro-degeneration) as well as in normal brain function. Accordingly, this review has been undertaken to describe the increasing number of in vivo techniques available to study Glu and Gln separately, or pooled as 'Glx'. The present MRS methods used to assess Glu and Gln vary in approach, complexity, and outcome, thus the focus of this review is on a description of MRS acquisition approaches, and an indication of relative utility of each technique rather than brain pathologies associated with Glu and/or Gln perturbation. Consequently, this review focuses particularly on (1) one-dimensional (1)H MRS, (2) two-dimensional (1)H MRS, and (3) one-dimensional (13)C MRS techniques.
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Affiliation(s)
- Saadallah Ramadan
- School of Health Sciences, Faculty of Health, Hunter Building, University of Newcastle, Callaghan NSW 2308, Australia
| | - Alexander Lin
- Alexander Lin: Center for Clinical Spectroscopy, Department of Radiology, Brigham and Women’s Hospital, Harvard Medical School, 4 Blackfan Street, HIM-820, Boston MA 02115
| | - Peter Stanwell
- School of Health Sciences, Faculty of Health, Hunter Building, University of Newcastle, Callaghan NSW 2308, Australia
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22
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Guo W, Cheng C, Wu Y, Jiang Y, Gao J, Li D, Jiang L. Bio-inspired two-dimensional nanofluidic generators based on a layered graphene hydrogel membrane. Adv Mater 2013; 25:6064-6068. [PMID: 23900945 DOI: 10.1002/adma.201302441] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Indexed: 06/02/2023]
Abstract
An electrogenetic layered graphene hydrogel membrane (GHM) possesses ultra-large interlayer spacing of about 10 nm, forming charged 2D nanocapillaries between graphene sheets that selectively permeate counter-ions and exclude co-ions. When an electrolyte flow goes through the GHM, it functions as an integrated 2D nanofluidic generator converting hydraulic motion into electricity. The maximum streaming conductance density approaches 16.8 μA cm(-2) bar(-1) .
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Affiliation(s)
- Wei Guo
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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Chang AT, Nikonowicz EP. Solution NMR determination of hydrogen bonding and base pairing between the glyQS T box riboswitch Specifier domain and the anticodon loop of tRNA(Gly). FEBS Lett 2013; 587:3495-9. [PMID: 24036450 DOI: 10.1016/j.febslet.2013.09.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [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: 07/11/2013] [Revised: 08/30/2013] [Accepted: 09/02/2013] [Indexed: 10/26/2022]
Abstract
In Gram-positive bacteria the tRNA-dependent T box riboswitch regulates the expression of many amino acid biosynthetic and aminoacyl-tRNA synthetase genes through a transcription attenuation mechanism. The Specifier domain of the T box riboswitch contains the Specifier sequence that is complementary to the tRNA anticodon and is flanked by a highly conserved purine nucleotide that could result in a fourth base pair involving the invariant U33 of tRNA. We show that the interaction between the T box Specifier domain and tRNA consists of three Watson-Crick base pairs and that U33 confers stability to the complex through intramolecular hydrogen bonding. Enhanced packing within the Specifier domain loop E motif may stabilize the complex and contribute to cognate tRNA selection.
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Affiliation(s)
- Andrew T Chang
- Department of Biochemistry and Cell Biology, Rice University, Houston, TX 77005-1892, United States
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Moon SH, Ban K, Kim C, Kim SS, Byun J, Song MK, Park IH, Yu SP, Yoon YS. Development of a novel two-dimensional directed differentiation system for generation of cardiomyocytes from human pluripotent stem cells. Int J Cardiol 2012; 168:41-52. [PMID: 23044428 DOI: 10.1016/j.ijcard.2012.09.077] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [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: 01/23/2012] [Revised: 06/18/2012] [Accepted: 09/14/2012] [Indexed: 10/27/2022]
Abstract
BACKGROUND Human pluripotent stem cells (hPSCs) hold great promise for treating ischemic heart disease. However, current protocols for differentiating hPSCs either result in low yields or require expensive cytokines. METHODS Here we developed a novel two dimensional (2D) stepwise differentiation system that generates a high yield of cardiomyocytes (CMs) from hPSCs without using special cytokines. Initially, undifferentiated hPSCs were transferred onto Matrigel-coated plates without forming embryoid bodies (EBs) for a few days and were cultured in bFGF-depleted human embryonic stem cells (hESCs) medium. When linear cell aggregation appeared in the margins of the hPSC colonies, the medium was changed to DMEM supplemented with 10% fetal bovine serum (FBS). Thereafter when cell clusters became visible, the medium was changed to DMEM with 20% FBS. RESULTS AND CONCLUSIONS At about two weeks of culture, contracting clusters began to appear and the number of contracting clusters continuously increased, reaching approximately 70% of all clusters. These clusters were dissociated by two-step enzyme treatment to monolayered CMs, of which ~90% showed CM phenotypes confirmed by an α-myosin heavy chain reporter system. Electrophysiologic studies demonstrated that the hPSC-derived CMs showed three major CM action potential types with 61 to 78% having a ventricular-CM phenotype. This differentiation system showed a clear spatiotemporal role of the surrounding endodermal cells for differentiation of mesodermal cell clusters into CMs. In conclusion, this system provides a novel platform to generate CMs from hPSCs at high yield without using cytokines and to study the development of hPSCs into CMs.
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Affiliation(s)
- Sung-Hwan Moon
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, United States
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