Synthesis of silver nanotubes by electroless deposition in porous anodic aluminium oxide templates

An electroless deposition method has been employed for the synthesis of silver nanotubes using porous anodic aluminium oxide as templates, by which high-yield silver nanotubes with length over ten microns have been synthesized

Growth of silver nanowires on metal plates by conventional redox displacement

通讯作者地址: Xie, ZX (通讯作者), Xiamen Univ, State Key Lab Phys Chem Solid Surface, Siming Nanlu 422, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R ChinaSilver nanowires (diameter 20-50 nm, length of the order of mum) have been synthesized in a high yield from nitric acid-treated iron plates dipped in a silver nitrate solution of an appropriate concentration. The formation of the silver nanowires is discussed in terms of silver nitrate concentration, substrate surface morphology and elemental nature of substrate. (C) 2003 Elsevier Science B.V. All rights reserved

High purity trigonal selenium nanorods growth via laser ablation under controlled temperature

通讯作者地址: Xie, ZX (通讯作者), Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R ChinaBy utilizing laser ablation, high purity trigonal selenium nanorods with different size have been synthesized from selenium powders. The high purity of the nanorods is attributed to freestanding growth process without catalyst or template. Its morphologies depend on both substrate temperature and reaction time. By controlling the experimental conditions, selenium nanorods with lateral dimensions in different range can be synthesized ranging from 20 nm to several hundred nanometers in width, and up to 10 mum in lengths. (C) 2002 Elsevier Science B.V. All rights reserved

Low temperature solvothermal synthesis of crumpled carbon nanosheets

通讯作者地址: Xie, ZX (通讯作者), Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Siming Nanlu 422, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] carbon nanosheets have been successfully synthesized via a catalyst-free solvothermal route at very low temperatures (60-100 degreesC), using tetrachloromethane as the carbon source and potassium as the reductant. The X-ray powder diffraction pattern indicates that the products are hexagonal graphite. Transmission and scanning electron microscopy show that the thickness of crumpled carbon nanosheets ranges from 3 to 8 nm. Raman spectroscopy supports the existence of graphitized carbon at the nanoscale. BET experiments show that carbon nanosheets have a large surface area. Compared with previous methods to prepare graphite nanosheets, such a low reaction temperature has attractive advantages

圣·约翰草提取物片治疗抑郁障碍专家共识

结合循证医学证据,本文归纳圣·约翰草提取物片治疗抑郁障碍的专家共识

Shape-controlled fabrication of porous ZnO architectures and their photocatalytic properties

通讯作者地址: Jiang, ZY (通讯作者), Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China 电子邮件地址: [email protected], [email protected] this paper, we report a simple two-step approach to prepare porous octahedron- and rod-shaped ZnO architectures. The morphology Of Porous ZnO particles can be conveniently tuned by controlling morphologies of the ZnC(2)O4 center dot 2H(2)O precursor. SEM and TEM characterization results indicate that these porous ZnO architectures are built up by numerous ZnO primary nanoparticles with random attachment. Based on thermogravimetry analysis, we believe that the release of water vapor, CO and CO2 leads to the formation of high-density pores in shape-controlled particles during the calcination process. Further experimental results indicate that as-prepared porous ZnO particles exhibit good photocatalytic activity due to large surface area. (C) 2008 Elsevier Inc. All rights reserved.National Natural Science Foundation of China 20725310 20721001 20673085 20671078 National Basic Research Program of China 2007CB815303 Fujian Province of China 2005HZ01-

Formation of ZnO hexagonal micro-pyramids: a successful control of the exposed polar surfaces with the assistance of an ionic liquid

Wurtzite ZnO hexagonal niicro-pyrantids, with all exposed surfaces being polar +/- (0001) and {10 (1) over bar1} planes, have been successfully synthesized using ionic liquids as solvents

Rational Design and Fabrication of ZnO Nanotubes from Nanowire Templates in a Microwave Plasma System

通讯作者地址: Xie, SY (通讯作者), Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R ChinaA nanowire-nanocable-nanotube scheme was designed for fabricating tubular ZnO in a microwave plasma system. Depending on optimal reaction conditions, diameters (from submicrometer to nanometer) and wall thicknesses of the tubular ZnOs can be controlled in the process. Data from morphology analyses, X-ray diffraction, photoluminescence spectra and Raman spectroscopy of the as-prepared ZnO nanotubes support the validity of the proposed three-step route for the fabrication of tubular ZnO

Tailoring the optical property by a three-dimensional epitaxial heterostructure: A case of ZnO/SnO2

Epitaxial growth, as a best strategy to attain a heterostructure with a well-defined and clean interface, usually takes place on a planar substrate. In this paper, using a ZnO/SnO2 core-shell heterostructure as an example, we demonstrate the possibility of establishing a three-dimensional epitaxial interface between two materials with different crystal systems for the first time and show possible tailoring optical properties by building the heteroepitaxial crystal interface. The characterization results of element mapping, high-resolution transmission electron microscopy, and selected area electric diffraction reveal that the as-prepared ZnO/SnO2 heterostructure has a tetrapod-like ZnO core and a SnO2 shell with 15-30 nm, and their special epitaxial relation is (010)(SnO2)||(0110)(ZnO) and [100](SnO2)||[0001](ZnO). Such three-dimensional epitaxy between the ZnO core and SnO2 shell is quite different from the usual planar epitaxy or three-dimensional epitaxy between materials having the same crystal structure. A rational model of such complicated epitaxy has been proposed through investigating the certain structural comparability between the wurtzite ZnO and rutile SnO2 crystals. The as-prepared T-ZnO/SnO2 epitaxial heterostructure exhibits unique luminescence properties in contrast with individual tetrapod ZnO and SnO2 nanostructures, in which the epitaxial interface induces new luminescence properties. This result may inspire great interest in exploring other complicated epitaxy systems and their potential applications in laser, gas sensor, solar energy conversion, photo catalysis, and nanodevices in the future

Controllable growth of In(OH)(3) nanorods with rod-in-rod structure in a surfactant solution

通讯作者地址: Xie, SY (通讯作者), Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Dept Chem, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Dept Chem, Xiamen 361005, Peoples R ChinaThe In(OH)(3) nanorods (25-55 nm in diameter and 120-200 nm in length) bearing parallel subunit nanorods (diameters ranging from 8 to 10 nm) were synthesized by controlling hydrolysis of indium nitrate in the presence of hexamethylene tetraamine and cetyltrimethylammonium bromide. (C) 2003 Elsevier B.V. All rights reserved