Interface dipole enhancement effect and enhanced Rayleigh scattering

作     者：Wenyun Wu Jingying Yue Dongqi Li Xiaoyang Lin Fangqiang Zhu Xue Yin Jun Zhu Xingcan Dai Peng Liu Yang Wei Jiaping Wang Haitao Yang Lina Zhang Qunqing Li Shoushan Fan Kaili Jiang 

作者机构：State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University Beijing 100084 China Department of Physics Indiana University-Purdue University Indianapolis Indianapolis Indiana USA State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments Tsinghua University Beijing 100084 China Collaborative Innovation Center of Quantum Matter Beijing 100084 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2015年第8卷第1期

页      面：303-319页

核心收录：

学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China  (11274190  11321091  51102144  51102147  90921012) 

主　　题：interface dipoleenhancement dielectric sphere near filed nanomaterials carbon nanotubes Rayleigh scattering 

摘      要：The optical effect of a nanometer or sub-nanometer interfacial layer of condensed molecules surrounding individual nanomaterials such as single-walled carbon nanotubes （SWCNTs） has been studied theoretically and experimentally. This interfacial layer, when illuminated by light, behaves as an optical dipole lattice and contributes an instantaneous near field which enhances the local field on neighboring atoms, molecules, or nanomaterials, which in turn may lead to enhanced Rayleigh scattering, Raman scattering, and fluorescence. The theory of this interface dipole enhanced effect （IDEE） predicts that a smaller distance between the nanomaterials and the plane of the interracial layer, or a larger ratio of the dielectric constants of the interfacial layer to the surrounding medium, will result in a larger field enhancement factor. This prediction is further experimentally verified by several implementations of enhanced Rayleigh scattering of SWCNTs as well as in situ Rayleigh scattering of gradually charged SWCNTs. The interface dipole enhanced Rayleigh scattering not only enables true-color real-time imaging of nanomaterials, but also provides an effective means to peer into the subtle interfacial phenomena.