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Nano Research 2019年第2期12卷 429-436页

作者： Xiaolei Yuan Xiaojing Jiang Muhan Cao Lei Chen Kaiqi Nie Yong Zhang Yong Xu Xuhui Sun Yanguang Li Qiao Zhang Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices SWC for I Synchrotron Radiation Research Soochow University 199 Renai Road Suzhou 215123 China

The development of Pt-based core/shell nanoparticles represents an emerging class of electrocatalysts for fuel cells, such as methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). Here, we present a one-pot synthesis approach to prepare hexagonal PtBi/Pt core/shell nan ostructure composed of an in termetallic PtiBii core and an ultrathi n Pt shell with well-defined shape, size, and *** structure and the synergistic effect among different components enhanced their MOR and EOR performanee. The optimized Pt2Bi nanoplates exhibit excellent mass activities in both MOR (4,820 mA·mgpt^-1) and EOR (5,950 mA·mgpt^1) conducted in alkaline media, which are 6.15 times and 8.63 times higher than those of commercial Pt/C, respectively. Pt2Bi nan opiates also show superior operati on durability to commercial Pt/C. This work may inspire the rational design and synthesis of Pt-based nanoparticles with improved performance for fuel cells and other applications.

关键词： intermetallics nanoplates core-shell structure methanol oxidation reaction ethanol oxidation reaction

Epitaxially aligned single-crystal gold nanoplates formed in large-area arrays at high yield

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Nano Research 2022年第1期15卷 296-303页

作者： Trevor B.Demille Robert D.Neal Arin S.Preston Zijuan Liang Allen G.Oliver Robert A.Hughes Svetlana Neretina College of Engineering University of Notre DameNotre DameIndiana 46556USA Department of Chemistry and Biochemistry University of Notre DameNotre DameIndiana 46556USA

Well-tailored nanomaterials with a single-crystal character provide ideal building blocks for on-chip plasmonic *** colloidal methods have demonstrated mastery over the synthesis of such structures,it has proven quite difficult to deploy these same nanomaterials on substrate surfaces in a highly deterministic manner where precise control over position and orientation is ***,we demonstrate a room-temperature two-reagent liquid-phase seed-mediated synthesis of gold nanoplates directly on substrate surfaces in arrays over a square-centimeter *** synthesis is reliant on benchtop lithographic and directed-assembly processes that give rise to single-crystal seeds of gold that express both an epitaxial relationship with the underlying substrate and the internal defect structure required to promote a two-dimensional growth *** resulting structures are highly faceted and,because seed-substrate epitaxy is imposed upon the growing nanoplates,are identically aligned on the substrate *** yields are increased to values as high as 95%using a post-processing sonication procedure that selectively removes a small population of irregularly shaped nanostructures from the substrate surface,and in doing so,gives rise to an uncompromised plasmonic *** work,therefore,advances the techniques needed to integrate single-crystal nanomaterials with wafer-based technologies and provides leading-edge capabilities in terms of defining large-area arrays of plasmonic structures with the nanoplate geometry.

关键词： nanoplates epitaxial array plasmon Brij-700 block copolymer substrate

Extended light absorption and accelerated charge migration in ultrathin twisted carbon nitride nanoplates for efficient solar hydrogen production

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Science China Chemistry 2024年第7期67卷 2215-2223页

作者： Yanmin Zou Shiyao Li Dandan Zheng Jianyong Feng Sibo Wang Yidong Hou Guigang Zhang State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350108China College of Environment and Safety Engineering Fuzhou UniversityFuzhou 350108China Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

Polymeric carbon nitride has been widely developed as a promising photocatalyst for solar hydrogen production via photocatalytic water ***,pristine carbon nitride prepared by traditional solid-state polymerization usually encounters issues such as rapid carrier recombination and insufficient absorption of visible light below 460 ***,poly(heptazine imide)with a distinctive nanoplate structure was synthesized in a binary molten salt of NaCl–CaCl_(2).The salt template allows the formation of the thin nanoplate structure,which promotes the charge separation and ***,the intercalation of Ca^(2+)ions between the conjugated layers endows the activation of n–π*electron transition due to the distortion of in-plane heptazine ***,the optimized poly(heptazine imide)nanoplates achieve an apparent quantum efficiency of up to 17.3%at 500 nm for photocatalytic hydrogen production from *** work shares new idea for rational control of the optical absorption and charge carrier dynamics of poly(heptazine imide).

关键词： photocatalysis poly heptazine imide nanoplates ion intercalation hydrogen production

Highly stable lead-free Cs3Bi2I9 perovskite nanoplates for photodetection applications

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Nano Research 2019年第8期12卷 1894-1899页

作者： Zhaoyang Qi Xianwei Fu Tiefeng Yang Dong Li Peng Fan Honglai Li Feng Jiang Lihui Li Ziyu Luo Xiujuan Zhuang Anlian Pan Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials and EngineeringSchool of Physics and Electronic Scienceand State Key Laboratory of Chemo/Biosensing and ChemometricsHunan UniversityChangsha 410082China

Lead halide perovskites have received tremendous attentions recently for their excellent properties such as high light absorption coefficient and long charge carrier diffusion length. However, the stability issues and the existence of toxic lead cations have largely limited their applications in optoelectronic area. Herein, we report the synthesis and investigation of highly stable and lead-free Cs3Bi2I9 perovskite nanoplates for visible light photodetection applications. The Cs3Bi2I9 nanoplates were synthesized through a facile solution-processed method, which is also applicable to various substrates. The achieved nanoplates present very good crystal quality and exhibit excellent long-term stability even exposed in moist air for several months. Photodetectors were constructed based on these high-quality perovskite nanoplates for the first time, and display a maximum photoresponsivity of 33.1 mA/W under the illumination of 450 nm laser, which is six times higher than the solution-synthesized CH3NH3PbI3 nanowire photodetectors. The specific detectivity of these devices can reach up to 10^10 Jones. Additionally, the devices exhibit fast rise and decay time of 10.2 and 37.2 ms, respectively, and highly stable photoswitching behavior with their photoresponse well retaining under alternating light and darkness. This work opens up a new opportunity for stable and low-toxic perovskite-based optoelectronic applications.

关键词： bismuth inorganic perovskite lead-free highly stable nanoplates photodetector

Nonlinear Bending of FCC nanoplates Based on a Quasi-Continuum Model

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Acta Mechanica Solida Sinica 2022年第6期35卷 1030-1039页

作者： Wenjing Zhan Yaqi Guo Ying Zhao Guohua Nie School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai200092China

A quasi-continuum model of plate-type nanomaterials with the face-centered cubic crystal structures is proposed in this *** fundamental governing equations for the nonlinear bending of the nanoplates are given by using the principle of minimum potential ***,the analytical solution is derived for cylindrical bending deformation of the structure under uniform transverse loading fixed at two sides based on the modified iterative method.A lattice finite element model is established to verify the present quasi-continuum ***,the corresponding solution by adopting the classical continuous plate theory is presented,in which two cases are considered for use of bulk values(limit values)and nanovalues of both elastic modulus and Poisson's *** difference among the quasi-continuum and continuous models are discussed by computation.

关键词： FCC nanoplates Quasi-continuum model Size effect Nonlinear bending

Three-Dimensional Static Analysis of nanoplates and Graphene Sheets by Using Eringen’s Nonlocal Elasticity Theory and the Perturbation Method

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Computers, Materials & Continua 2016年第5期52卷 73-103页

作者： Chih-Ping Wu Wei-Chen Li Department of Civil Engineering National Cheng Kung UniversityTainan 70101TaiwanROC

A three-dimensional(3D)asymptotic theory is reformulated for the static analysis of simply-supported,isotropic and orthotropic single-layered nanoplates and graphene sheets(GSs),in which Eringen’s nonlocal elasticity theory is used to capture the small length scale effect on the static behaviors of *** perturbation method is used to expand the 3D nonlocal elasticity problems as a series of two-dimensional(2D)nonlocal plate problems,the governing equations of which for various order problems retain the same differential operators as those of the nonlocal classical plate theory(CST),although with different nonhomogeneous *** the primary field variables of each order as the double Fourier series functions in the in-plane directions,we can obtain the Navier solutions of the leading-order problem,and the higher-order modifications can then be determined in a hierarchic and consistent *** benchmark solutions for the static analysis of isotropic and orthotropic nanoplates and GSs subjected to sinusoidally and uniformly distributed loads are given to demonstrate the performance of the 3D nonlocal asymptotic theory.

关键词： Eringen’s nonlocal elasticity theory graphene sheets nanoplates static the perturbation method three-dimensional nonlocal elasticity

Colloidal synthesis and phase transformation of all-inorganic bismuth halide perovskite nanoplates

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Nano Research 2023年第1期16卷 1703-1711页

作者： Chao Wang Jiawen Xiao Zhengguang Yan Xiaowei Niu Taifeng Lin Yingchun Zhou Jingyu Li Xiaodong Han Institute of Microstructure and Property of Advanced Materials Beijing Key Lab of Microstructure and Property of Advanced MaterialsFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Faculty of Environment and Life Beijing University of TechnologyBeijing 100124China

Lead-free bismuth-based halide perovskites and their analogues have attracted research interest for their high stability and optoelectronic ***,the morphology-controlled synthesis of bismuth-based perovskite nanocrystals has been rarely ***,we report the colloidal synthesis of zero-dimensional(0D)Cs3BiCl6 nanosheets(NSs),Cs3Bi2Cl9 NSs/nanoplates(NPs)and Cs4MnBi2Cl12 NPs through a hot-injection *** demonstrate that the Cs3BiCl6 NSs,as an initial product of Cs3Bi2Cl9 and Cs4MnBi2Cl12 NPs,can transform into Cs3Bi2Cl9 NSs or Cs4MnBi2Cl12 NPs via Cl-induced metal ion insertion reactions under the templating effect of *** growth mechanism is also applicable for the synthesis of Cs4CdBi2Cl12 ***,the alloying of Cd2+into Cs4MnBi2Cl12 lattice could weaken the strong coupling effect between Mn and Mn,which leads to a prolonged photoluminescence lifetime and an enhanced photoluminescence quantum yield(PLQY).As a proof of concept,the alloyed Cs4MnxCd1–xBi2Cl12 NPs are used as a scintillator,which show a lowest detection limit of 134.5 nGy/*** X-ray imaging results display a high spatial resolution of over 20 line pairs per millimeter(lp/mm).These results provide new insights in the synthesis of anisotropic bismuth-based perovskite nanocrystals and their applications in radiation detection.

关键词： bismuth-based perovskites layered double perovskite nanoplates morphology control scintillators

Application of a p-version curved C^(1)finite element based on the nonlocal Kirchhoff plate theory to the vibration analysis of irregularly shaped nanoplates

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Science China(Technological Sciences) 2023年第10期66卷 3025-3047页

作者： XIANG Wei NI Hua TIAN YiFeng WU Yang LIU Bo School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province Chengdu 610031China Southwest China Research Institute of Electronic Equipment Chengdu 610036China CAEP Software Center for High Performance Numerical Simulation Beijing 100088China Institute of Applied Physics and Computational Mathematics Beijing 100088China The Solid Mechanics Research Centre Beihang University(BUAA)Beijing 100191China

nanoplates have been widely used as elementary components for ultrasensitive and ultrafine resolution applications in the field of nano-electro-mechanical systems because of their potentially remarkable mechanical *** accurate analysis of their mechanical behavior is currently of particular interest in the function design and reliability analysis of nano-scaled *** examine the size-dependent bending and vibration behavior of nanoplates with curvilinear and irregular shapes,a new p-version curved C^(1)finite element is formulated in the framework of the nonlocal Kirchhoff plate *** newly developed element not only enables an accurate geometry representation and easy mesh generation of curvilinear domains but also overcomes the difficulty of imposing C^(1)conformity required by the nonlocal Kirchhoff plate model,particularly on the curvilinear inter-element *** examples show that this element can produce an exponential rate of convergence even when curved elements are used in the domain *** numerical results are presented for nanoplates with various geometric shapes,including rectangular,circular,elliptic,annular,and *** high accuracy of the present element is verified by comparing the obtained results with analytical and numerical results in the ***,a comprehensive parametric analysis is conducted to investigate the influences of nonlocal parameters,plate dimensions,and boundary conditions on the nonlocal behavior of *** present element can be envisaged to allow large-scale mechanical simulations of nanoplates,with a guarantee of accuracy and efficiency.

关键词： nanoplates nonlocal theory p-version finite element method C^(1)conformity irregular shape

Controlling the lateral and vertical dimensions of Bi2Se3 nanoplates via seeded growth

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Nano Research 2015年第1期8卷 246-256页

作者： Awei Zhuang Yuzhou Zhao Xianli Liu Mingrui Xu Youcheng Wang Unyong Jeong Xiaoping Wang Jie Zeng Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovation Center of Suzhou Nano Science and Technology Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics University of Science and Technology of China Hefei Anhui 230026 P. R. China Department of Materials Science and Engineering Yonsei University 134 Shinchon-dong Seoul Korea

Modulation of the morphology of nanostructures is often a rewarding but challenging task. We have employed the seeded growth method and induced kinetic control to synthesize Bi2Se3 nanoplates with modifiable morphology. By manipulating the rate at which precursor solutions were injected into seeds solution with syringe pumps, two distinctive growth modes could be realized. With a fast injection, the thickness of Bi2Se3 nanoplates slightly increased from N7.5 nm （seeds） to -9.5 nm while the edge length grew up from ~160 nm （seeds） to N12 ~tm, after 6 successive rounds of seeded growth. With a slow injection, the thickness and edge length increased simultaneously to -35 nm and -6 b^m after 6 rounds of growth, respectively. These two modes could be viewed as a competition between atomic deposition and surface migration. The products showed interesting, thickness-dependent Raman properties. In addition, NIR transparent, highly conductive and flexible Bi2Se3 thin films with different thicknesses were constructed by the assembly of the as-synthesized Bi2Se3 nanoplates. This approach based on seeded growth and kinetic control can significantly promote the development of versatile nanostructures with diverse morphology.

关键词： bismuth selenide nanoplates seeded growth kinetic control

α-Fe_2O_3 nanoplates with superior electrochemical performance for lithium-ion batteries

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Green Energy & Environment 2018年第2期3卷 156-162页

作者： Li Xu Yuhui Tian Tiefeng Liu Henan Li Jingxia Qiu Sheng Li Huaming Li Shouqi Yuan Shanqing Zhang Institute for Energy Research School of Chemistry and Chemical Engineering Jiangsu University Centre for Clean Environment and Energy Environmental Futures Research Institute and Griffith School of Environment Griffith University Gold Coast Campus

On account of the high theoretical capacity, high corrosion resistance, environmental benignity, abundant availability and low cost, the research on a-Fe_2O_3 has been gradually fastened on as promising anodes materials toward lithium-ion batteries(LIBs). A high-performance anode for LIBs based on α-Fe_2O_3 nanoplates have been selectively prepared. The α-Fe_2O_3 nanoplates can be synthesized with iron ionbased ionic liquid as iron source and template. The α-Fe_2O_3 nanoplates as the anode of LIBs can display high capacity of around1950 mAh g^(-1) at 0.5 A g^(-1) which have exceeded the theoretical capacity of α-Fe_2O_3. On account of unique nanoplate structures and gum arabic as binder, the α-Fe_2O_3 nanoplates also exhibit high rate capability and excellent cycling performance.

关键词： α-Fe2O3 nanoplates Li-ion battery High reversible capacity Anode