The Experts below are selected from a list of 17487 Experts worldwide ranked by ideXlab platform
Hua Zhang - One of the best experts on this subject based on the ideXlab platform.
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2D Nanomaterials: beyond graphene and transition metal dichalcogenides.
Chemical Society reviews, 2018Co-Authors: Hua Zhang, Hui-ming ChengAbstract:Guest Editors Hua Zhang, Hui-Ming Cheng and Peide Ye introduce the 2D Nanomaterials: beyond graphene and transition metal dichalcogenides themed issue of Chemical Society Reviews.
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2D Nanomaterials: graphene and transition metal dichalcogenides
Chemical Society reviews, 2018Co-Authors: Hua Zhang, Manishkumar Chhowalla, Zhongfan LiuAbstract:Guest editors Hua Zhang, Manish Chhowalla and Zhongfan Liu introduce the 2D Nanomaterials: graphene and transition metal dichalcogenides themed issue of Chemical Society Reviews.
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Production of Two-Dimensional Nanomaterials via Liquid-Based Direct Exfoliation
Small (Weinheim an der Bergstrasse Germany), 2015Co-Authors: Liyong Niu, Hua Zhang, Manishkumar Chhowalla, Jonathan N. Coleman, Hyeon Suk Shin, Zijian ZhengAbstract:Tremendous efforts have been devoted to the synthesis and application of two-dimensional (2D) Nanomaterials due to their extraordinary and unique properties in electronics, photonics, catalysis, etc., upon exfoliation from their bulk counterparts. One of the greatest challenges that scientists are confronted with is how to produce large quantities of 2D Nanomaterials of high quality in a commercially viable way. This review summarizes the state-of-the-art of the production of 2D Nanomaterials using liquid-based direct exfoliation (LBE), a very promising and highly scalable wet approach for synthesizing high quality 2D Nanomaterials in mild conditions. LBE is a collection of methods that directly exfoliates bulk layered materials into thin flakes of 2D Nanomaterials in liquid media without any, or with a minimum degree of, chemical reactions, so as to maintain the high crystallinity of 2D Nanomaterials. Different synthetic methods are categorized in the following, in which material characteristics including dispersion concentration, flake thickness, flake size and some applications are discussed in detail. At the end, we provide an overview of the advantages and disadvantages of such synthetic methods of LBE and propose future perspectives.
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Non-volatile resistive memory devices based on solution-processed ultrathin two-dimensional Nanomaterials
Chemical Society reviews, 2015Co-Authors: Chaoliang Tan, Zhengdong Liu, Wei Huang, Hua ZhangAbstract:Ultrathin two-dimensional (2D) Nanomaterials, such as graphene and MoS2, hold great promise for electronics and optoelectronics due to their distinctive physical and electronic properties. Recent progress in high-yield, massive production of ultrathin 2D Nanomaterials via various solution-based methods allows them to be easily integrated into electronic devices via solution processing techniques. Non-volatile resistive memory devices based on ultrathin 2D Nanomaterials have been emerging as promising alternatives for the next-generation data storage devices due to their high flexibility, three-dimensional-stacking capability, simple structure, transparency, easy fabrication and low cost. In this tutorial review, we will summarize the recent progress in the utilization of solution-processed ultrathin 2D Nanomaterials for fabrication of non-volatile resistive memory devices. Moreover, we demonstrate how to achieve excellent device performance by engineering the active layers, electrodes and/or device structure of resistive memory devices. On the basis of current status, the discussion is concluded with some personal insights into the challenges and opportunities in future research directions.
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Ultrathin Two-Dimensional Nanomaterials
ACS Nano, 2015Co-Authors: Hua ZhangAbstract:The past decade has witnessed an extraordinary increase in research progress on ultrathin two-dimensional (2D) Nanomaterials in the fields of condensed matter physics, materials science, and chemistry after the exfoliation of graphene from graphite in 2004. This unique class of Nanomaterials has shown many unprecedented properties and thus is being explored for numerous promising applications. In this Perspective, I briefly review the state of the art in the development of ultrathin 2D Nanomaterials and highlight their unique advantages. Then, I discuss the typical synthetic methods and some promising applications of ultrathin 2D Nanomaterials together with some personal insights on the challenges in this research area. Finally, on the basis of the current achievement on ultrathin 2D Nanomaterials, I give some personal perspectives on potential future research directions.
Mahmoud Elzalabani - One of the best experts on this subject based on the ideXlab platform.
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Improved the quality factor and sensitivity of a surface plasmon resonance sensor with transition metal dichalcogenide 2D Nanomaterials
Journal of Nanoparticle Research, 2020Co-Authors: Mohamed Alagdar, Bedir Yousif, Nehal F. Areed, Mahmoud ElzalabaniAbstract:In this paper, design and modeling of a surface plasmon resonance (SPR) sensors using transition metal dichalcogenide (TMDC) 2D Nanomaterials such as tungsten sulfide (WS2) and graphene with the improvements of the sensitivity and the figure of merit (FoM) are demonstrated. The proposed sensors are based on Kretschmann configuration for the obtaining of the reflectivity using the transfer matrix method (TMM) and Fresnel equations. A monolayer of nickel (Ni) was added between WS2 layers and graphene layers to enhance the sensitivity (S) and FoM of our proposed sensor. The reported sensor exhibits a good angular sensitivity which is improved to the maximum value of 243.31°/RIU. It is noted the SPR sensor sensitivity changes with the variation of the WS2 and graphene layer numbers. Full width half maximum (FWHM) values are minimized to be 7.15°; then, the FoM is reached to be 34.03 RIU−1 which gives better sensing properties in comparison with other published articles.
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Highly sensitive fiber optic surface plasmon resonance sensor employing 2D Nanomaterials
Applied Physics A, 2020Co-Authors: Mohamed Alagdar, Bedir Yousif, Nehal F. Areed, Mahmoud ElzalabaniAbstract:Optical fiber-based surface plasmon resonance sensors using, silver layer (Ag), platinum (Pt), and indium tin oxide in addition to 2D Nanomaterials such as graphene are presented in this research. In terms of sensitivity (S) and figure of merit (FoM), the performance analysis of the proposed and configured sensor has been demonstrated. The proposed sensors are based on the scheme of Kretschmann for obtaining the transmitted power using the transfer matrix method and the equations of Fresnel. With theoretical and numerical studies, the reported sensor exhibits a good wavelength sensitivity which is improved to the maximum value of 4150 nm/RIU. Full width half maximum values are minimized to be 59 nm and the FoM is optimized to be 70 RIU−1 which gives better sensing properties in comparison with other published articles.
Franz Faupel - One of the best experts on this subject based on the ideXlab platform.
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Wet-Chemical Assembly of 2D Nanomaterials into Lightweight, Microtube-Shaped, and Macroscopic 3D Networks.
ACS applied materials & interfaces, 2019Co-Authors: Florian Rasch, Fabian Schutt, Lena M Saure, Soren Kaps, Julian Strobel, Oleksandr Polonskyi, Ali Shaygan Nia, Martin R Lohe, Yogendra Kumar Mishra, Franz FaupelAbstract:Despite tremendous efforts toward fabrication of three-dimensional macrostructures of two-dimensional (2D) materials, the existing approaches still lack sufficient control over microscopic (morphology, porosity, pore size) and macroscopic (shape, size) properties of the resulting structures. In this work, a facile fabrication method for the wet-chemical assembly of carbon 2D Nanomaterials into macroscopic networks of interconnected, hollow microtubes is introduced. As demonstrated for electrochemically exfoliated graphene, graphene oxide, and reduced graphene oxide, the approach allows for the preparation of highly porous (> 99.9%) and lightweight (
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wet chemical assembly of 2D Nanomaterials into lightweight microtube shaped and macroscopic 3d networks
ACS Applied Materials & Interfaces, 2019Co-Authors: Florian Rasch, Fabian Schutt, Lena M Saure, Soren Kaps, Julian Strobel, Oleksandr Polonskyi, Ali Shaygan Nia, Martin R Lohe, Yogendra Kumar Mishra, Franz FaupelAbstract:Despite tremendous efforts toward fabrication of three-dimensional macrostructures of two-dimensional (2D) materials, the existing approaches still lack sufficient control over microscopic (morphology, porosity, pore size) and macroscopic (shape, size) properties of the resulting structures. In this work, a facile fabrication method for the wet-chemical assembly of carbon 2D Nanomaterials into macroscopic networks of interconnected, hollow microtubes is introduced. As demonstrated for electrochemically exfoliated graphene, graphene oxide, and reduced graphene oxide, the approach allows for the preparation of highly porous (> 99.9%) and lightweight (<2 mg cm-3) aeromaterials with tailored porosity and pore size as well as tailorable shape and size. The unique tubelike morphology with high aspect ratio enables ultralow-percolation-threshold graphene composites (0.03 S m-1, 0.05 vol%) which even outperform most of the carbon nanotube-based composites, as well as highly conductive aeronetworks (8 S m-1, 4 mg cm-3). On top of that, long-term compression cycling of the aeronetworks demonstrates remarkable mechanical stability over 10 000 cycles, even though no chemical cross-linking is employed. The developed strategy could pave the way for fabrication of various macrostructures of 2D Nanomaterials with defined shape, size, as well as micro- and nanostructure, crucial for numerous applications such as batteries, supercapacitors, and filters.
Han Zhang - One of the best experts on this subject based on the ideXlab platform.
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2D Nanomaterials for Tissue Engineering and Regenerative Nanomedicines: Recent Advances and Future Challenges.
Advanced healthcare materials, 2021Co-Authors: Yuanyuan Zheng, Xiangqian Hong, Jiantao Wang, Longbao Feng, Taojian Fan, Rui Guo, Han ZhangAbstract:Regenerative medicine has become one of the hottest research topics in medical science that provides a promising way for repairing tissue defects in the human body. Due to their excellent physicochemical properties, the application of 2D Nanomaterials in regenerative medicine has gradually developed and has been attracting a wide range of research interests in recent years. In particular, graphene and its derivatives, black phosphorus, and transition metal dichalcogenides are applied in all the aspects of tissue engineering to replace or restore tissues. This review focuses on the latest advances in the application of 2D-nanomaterial-based hydrogels, nanosheets, or scaffolds that are engineered to repair skin, bone, and cartilage tissues. Reviews on other applications, including cardiac muscle regeneration, skeletal muscle repair, nerve regeneration, brain disease treatment, and spinal cord healing are also provided. The challenges and prospects of applications of 2D Nanomaterials in regenerative medicine are discussed.
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Two-dimensional nanomaterial-based plasmonic sensing applications: Advances and challenges
Coordination Chemistry Reviews, 2020Co-Authors: Jie Zhou, Han Zhang, Tingqiang Yang, Jiajie Chen, Cong Wang, Yonghong ShaoAbstract:Abstract Plasmonic sensors have been steadily gaining popularity in the fields of biochemical analysis, disease diagnosis and environmental monitoring. Two-dimensional (2D) Nanomaterials such as graphene and transition metal dichalcogenides (TMDs) are extensively used in the plasmonic sensing due to their attractive physicochemical properties. In this review, we first present the structures and properties of 2D Nanomaterials. Then we discuss the synthesis methods of 2D Nanomaterials, including the top-down and bottom-up approaches, as well as the fabrication method of 2D nanomaterial-based plasmonic sensor. Thereafter, we elaborate on the recent research advances in the use of 2D Nanomaterials for plasmonic sensing including localized surface plasmon resonance (LSPR) sensing, surface plasmon resonance (SPR) sensing and surface enhanced Raman scattering (SERS) sensing. Finally, we provide concluding perspectives on the current status, challenges, and future directions of 2D Nanomaterials in the plasmonic sensing applications.
Mohamed Alagdar - One of the best experts on this subject based on the ideXlab platform.
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Improved the quality factor and sensitivity of a surface plasmon resonance sensor with transition metal dichalcogenide 2D Nanomaterials
Journal of Nanoparticle Research, 2020Co-Authors: Mohamed Alagdar, Bedir Yousif, Nehal F. Areed, Mahmoud ElzalabaniAbstract:In this paper, design and modeling of a surface plasmon resonance (SPR) sensors using transition metal dichalcogenide (TMDC) 2D Nanomaterials such as tungsten sulfide (WS2) and graphene with the improvements of the sensitivity and the figure of merit (FoM) are demonstrated. The proposed sensors are based on Kretschmann configuration for the obtaining of the reflectivity using the transfer matrix method (TMM) and Fresnel equations. A monolayer of nickel (Ni) was added between WS2 layers and graphene layers to enhance the sensitivity (S) and FoM of our proposed sensor. The reported sensor exhibits a good angular sensitivity which is improved to the maximum value of 243.31°/RIU. It is noted the SPR sensor sensitivity changes with the variation of the WS2 and graphene layer numbers. Full width half maximum (FWHM) values are minimized to be 7.15°; then, the FoM is reached to be 34.03 RIU−1 which gives better sensing properties in comparison with other published articles.
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Highly sensitive fiber optic surface plasmon resonance sensor employing 2D Nanomaterials
Applied Physics A, 2020Co-Authors: Mohamed Alagdar, Bedir Yousif, Nehal F. Areed, Mahmoud ElzalabaniAbstract:Optical fiber-based surface plasmon resonance sensors using, silver layer (Ag), platinum (Pt), and indium tin oxide in addition to 2D Nanomaterials such as graphene are presented in this research. In terms of sensitivity (S) and figure of merit (FoM), the performance analysis of the proposed and configured sensor has been demonstrated. The proposed sensors are based on the scheme of Kretschmann for obtaining the transmitted power using the transfer matrix method and the equations of Fresnel. With theoretical and numerical studies, the reported sensor exhibits a good wavelength sensitivity which is improved to the maximum value of 4150 nm/RIU. Full width half maximum values are minimized to be 59 nm and the FoM is optimized to be 70 RIU−1 which gives better sensing properties in comparison with other published articles.
