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One-pot synthesis of Sb-Fe-carbon-fiber composites with in situ catalytic growth of carbon fibers

International Journal of Minerals,Metallurgy and Materials 2012年第6期19卷 542-548页

作者： Jiart Xie Wen-tao Song Gao-shao Cao Xin-bing Zhao Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

A Sb-Fe-carbon-fiber （CF） composite was prepared by a chemical vapor deposition （CVD） method with in situ growth of CFs us- ing Sb203/Fe2O3 as the precursor and acetylene （C2H2） as the carbon source. The Sb-Fe-CF composite was characterized by X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM） and transmission electron microscopy （TEM）, and its electrochemical per- formance was investigated by galvanostatic charge-discharge cycling and electrochemical impedance spectroscopy. The Sb-Fe-CF composite shows a better cycling stability than the Sb-amorphous-carbon composite prepared by the same CVD method but using Sb2O3 as the precur- sor. Improvements in cycling stability of the Sb-Fe-CF composite can be attributed to the formation of three-dimensional network structure by CFs, which can connect Sb particles firmly. In addition, the CF layer can buffer the volume change effectively.

关键词： composite materials antimony alloys carbon fibers chemical vapor deposition catalytic growth network structures lithiumbatteries anodes

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Millimeter-sized few-layer graphene sheets with aligned channels for fast lithium-ion charging kinetics

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Journal of Energy Chemistry 2021年第4期30卷 62-69页

作者： Yu-Qi Zhou Xiao-Ling Dong Wen-Cui Li Guang-Ping Hao Dong Yan An-Hui Lu State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina

Assembly of the top-down graphene units mostly results in 3D porous structure with randomly organized *** direct bottom-up synthesis of macroscopic 2D graphene sheets with organized pores are long sought in materials chemistry field,but rarely ***,we present a self-catalysisassisted bottom-up route usingL-glutamic acid and iron chloride as starting materials for the fabrication of the millimeter-sized few-layer graphene sheets with aligned porous channels parallel to the 2D *** amino-and carboxyl-functional groups inL-glutamic acid can coordinate with iron cations,thus allowing an atomic dispersion of iron *** pyrolysis thus initiated the growth of graphene catalyzed by in-situ generated iron nanoparticles,and a dynamic flow of iron nanoparticles eventually led to the formation of millimeter-sized few-layer graphene sheets with aligned channels(60-85 nm in diameter).Used as anodes in lithium-ion batteries,these graphene sheets showed a good rate capability(142 m A h g^(-1) at 2 A g^(-1))and high capacity retention of 93%at 2 A g^(-1) after 1200 *** analysis revealed that lithium ions storage was dominated by diffusion behavior and capacitive behavior together,in that graphene sheets with aligned channels could accelerate electron transfer and shorten lithium ions transport *** work provides a novel approach to prepare unique porous graphene materials with specific structure for energy storage.

关键词： Few-layer graphene Aligned channels catalytic growth Lithium-ion batteries

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Toward monolithic growth integration of nanowire electronics in 3D architecture: a review

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Science China(Information Sciences) 2023年第10期66卷 105-134页

作者： Lei LIANG Ruijin HU Linwei YU School of Electronic Science and Engineering Nanjing University School of Physical Science and Technology/Microelectronics Industry Research Institute Yangzhou University

Quasi-one-dimensional(1D) semiconducting nanowires(NWs), with excellent electrostatic control capability, are widely regarded as advantageous channels for the fabrication of high-performance microelectronics, memories, and sensors. For example, the latest Si field-effect-transistor(FET) technology nodes,growth integration of orderly 1D SiNW channels is desired, as it will provide an alternative or complementary new route to fabricate a multilayer of Si CMOS logics/memories in a fully 3D stacked manner. In this study, we assess the evolution and recent progress of catalytic growth strategies for ultrathin 1D channels in-plane or planar NWs, and revisit the key mechanisms and technological milestones in geometry, lattice quality, line-shape, position, and composition controls. We aim to eventually establish a reliable catalytic growth integration strategy, suitable for the fabrication of GAA FETs and the implementation of a monolithic 3D integration architecture. Finally, we also present a summary and perspectives on the current challenges and future opportunities of monolithic growth integration of NW electronics in 3D architecture.

关键词： catalytic growth silicon nanowires electronics monolithic 3D-integration

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Fabrication of Syringe-Shaped GaN Nanorods

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Chinese Physics Letters 2006年第3期23卷 686-688页

作者：薛成山吴玉新庄惠照田德恒刘亦安何建廷艾玉杰孙莉莉王福学曹玉萍 Institute of Semiconductors College of Physics and Electronics Shandong NormM University Jinan 250014

Syringe-shaped GaN nanorods are synthesized on Si（111） substrates by annealing sputtered Ga2O3/BN films under flowing ammonia at temperature of 950℃. Most of the nanorods consist of a main rod and a top needle, looking like a syringe. X-ray diffraction and selected-area electron diffraction confirm that the syringe-shaped nanorods are hexagonal wurtzite GaN. Scanning electron microscopy and high-resolution transmission electron microscopy reveal that these nanorods are as long as several micrometres, with diameters ranging from 100 to 300nm. In addition to the BN intermediate layer, the proper annealing temperature has been demonstrated to be a crucial factor for the growth of syringe-shaped nanorods by this method.

关键词： GALLIUM NITRIDE NANORODS catalytic growth NANOWIRES

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Synthesis of Monodisperse CdS Nanorods Catalyzed by Au Nanoparticles

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Nano Research 2008年第4期1卷 314-320页

作者： Hongwang Zhang Savas Delikanli Yueling Qin Shuli He Mark Swihart Hao Zeng Department of Chemical and Biological Engineering University at BuffaloSUNYBuffaloNY 14260USA Department of Physics University at BuffaloSUNYBuffaloNY 14260USA Department of Physics Capital Normal UniversityBeijing 100048China

Semiconductor nanocrystals(dots,rods,wires,etc.)exhibit a wide range of electrical and optical properties that differ from those of the corresponding bulk *** properties depend on both nanocrystal size and *** with nanodots,nanorods have an additional degree of freedom,the length or aspect ratio,and reduced symmetry,which leads to anisotropic *** this paper,we report the Au nanoparticle-catalyzed colloidal synthesis of monodisperse CdS *** on systematic high resolution transmission electron microscopy studies,we propose a growth mechanism for these nanorods.

关键词： Nanorods monodisperse catalytic growth solution phase synthesis

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growth of carbon nanotubes in chemical vapor deposition process: svnergistic effects between nanotubes themselves and metal

Growth of carbon nanotubes in chemical vapor deposition proc...

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第十三届全国催化学术会议

作者： Guixiang Du, Jianghong Zhao, Shouai Feng, Chang Song, Zhenping Zhu (State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, CAS, Taiyuan 030001)

＜正＞1. Introduction The growth mechanism of carbon nanotubes （CNTs） in chemical vapor deposition （CVD） with metal catalysis has been extensively studied, however, is still unclear in some key aspects. The mostly... 详细信息

关键词： Carbon nanotues Chemical vapor deposition catalytic growth Synergistic effects

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