Local electric field enhancement of neighboring Ag nanoparticles in surface enhanced Raman scattering
We used a simple low-temperature hydrothermal approach to synthesize Ag nanoparticles (NiPs) and demonstrated their efficiency as organic molecule detectors in surface enhanced Raman Scattering (SERS).Using finite difference time domain simulation,we described an investigation on the distribution of electric fields amplitude of the neighboring Ag NPs.The enhanced electric field is confined at the interparticle gaps and the enhancement factor can be further increased with reducing the spacing between the NPs.The theoretical simulation demonstrated good consistency with the experimental measurement results,which predicts an electric fields amplitude enhancement of 115 at the center of NPs gap and an electromagnetic SERS enhancement of 108.The evidence of clear correlations between SERS enhancement and morphology distribution offer a route to develop more effective SERS substrates.
SERS interparticle gap electric field FDTD
Chaoyue Denga Guling Zhangb Bin Zou Honglong Shi Yujie Liang Yongchao Li Jinxiang Fu Wenzhong Wang
School of Science,Minzu University of China Beijing,100081,PR China
国际会议
郑州
英文
573-577
2013-10-19（万方平台首次上网日期，不代表论文的发表时间）