文献类型：期刊文献

英文题名：Gold nanoparticles on MoS2 layered crystal flakes

作者：Cao, Wei[1];Pankratov, Vladimir[1];Huttula, Marko[1];Shi, Xinying[1];Saukko, Sami[2];Huang, Zhongjia[3];Zhang, Meng[4]

机构：[1]Univ Oulu, Dept Chem & Phys, FIN-90014 Oulu, Finland;[2]Univ Oulu, Ctr Microscopy & Nanotechnol, FIN-90014 Oulu, Finland;[3]Anhui Polytech Univ, Sch Mech & Automot Engn, Wuhu 241000, Peoples R China;[4]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2015

卷号：158

起止页码：89

外文期刊名：MATERIALS CHEMISTRY AND PHYSICS

收录：;EI(收录号：20151300696987);WOS:【SCI-EXPANDED(收录号:WOS:000353736700012)】；

基金：We acknowledge financial supports from Oulu University Strategic Grant, the Research Council for Natural Sciences and Engineering of the Academy of Finland, National Natural Science Foundation of China (Grant No.11204079), and the Natural Science Foundation of Shanghai (Grant No. 12ZR1407000). X.Y.S. thanks scholarship sponsored by China Scholarship Council. Authors thank Center of Microscopy and Nanotechnology of Oulu University for XPS and A. Tuomela for assisting PL measurements.

语种：英文

外文关键词：Nanostructures; Chemical synthesis; Electron microscopy; Photoluminescence spectroscopy

摘要：Inorganic layered crystal MoS2 is considered as one of the most promising and efficient semiconductor materials for future transistors, photoelectronics, and electrocatalysis. To boost MoS2-based material applications, one direction is to grow physically and chemically reactive nanoparticles onto MoS2. Here we report on a simple route to synthesis crystalized MoS2-Au complexes. The gold nanoparticles were grown on MoS2 flakes through a wet method in the oxygen free environment at room temperature. Nanoparticles with diameters varying from 9 nm to 429 nm were controlled by the molar ratios of MoS2 and HAuCl4 precursors. MoS2 host flakes keep intrinsic honeycomb layered structures and the Au nanoparticles cubic-center crystal microstructures. From product chemical states analysis, the synthesis was found driven by redox reactions between the sulphide and the chloroauric acid. Photoluminescence measurement showed that introducing Au nanoparticles onto MoS2 stacks substantially prompted excitonic transitions of stacks, as an analogy for doping Si wafers with dopants. Such composites may have potential applications in wide ranges similar as the doped Si. (C) 2015 Elsevier B.V. All rights reserved.