Synthesis and surface plasmon resonance of Au–ZnO Janus nanostructures  

作　　者：Jun Zhou Jian-Shuo Zhang Guo-Yu Xian Qi Qi Shang-Zhi Gu Cheng-Min Shen Zhao-Hua Cheng Sheng-Tai He Hai-Tao Yang 周俊;张建烁;冼国裕;齐琦;顾尚志;申承民;成昭华;何声太;杨海涛(School of Material Science and Engineering,Tianjin Polytechnic University,Tianjin 300387,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]School of Material Science and Engineering,Tianjin Polytechnic University,Tianjin 300387,China [2]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Physics B》2019年第8期84-89,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11274370 and 51471185);the National Key Research and Development Program of China(Grant Nos.2016YFJC020013 and 2018FYA0305800)

摘　　要：Metal-semiconductor Janus nanostructures with asymmetry and directionality have recently aroused significant interest,both in fundamental light-matter interactions mechanism and in technological applications.Here we report the synthesis of different Au-ZnO Janus nanostructures via a facile one-pot colloid method.The growth mechanism is revealed by a series of designed synthesis experiments.The light absorption properties are determined by both the decrease of dipole oscillations of the free electrons and the plasmon-induced hot-electron transfer.Moreover,the finite-difference time-domain(FDTD)simulation method is used to elucidate the electric field distributions of these Janus nanostructures.Metal–semiconductor Janus nanostructures with asymmetry and directionality have recently aroused significant interest, both in fundamental light–matter interactions mechanism and in technological applications. Here we report the synthesis of different Au–ZnO Janus nanostructures via a facile one-pot colloid method. The growth mechanism is revealed by a series of designed synthesis experiments. The light absorption properties are determined by both the decrease of dipole oscillations of the free electrons and the plasmon-induced hot-electron transfer. Moreover, the finite-difference time-domain(FDTD) simulation method is used to elucidate the electric field distributions of these Janus nanostructures.

关 键 词：Au-ZnO SERS FINITE-DIFFERENCE TIME-DOMAIN mechanism 

分 类 号：O4[理学—物理]