Metal Nanoparticle鈥揘anowire Assisted SERS on Film
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- 作者：Jingjing Hao ; Ting Liu ; Yingzhou Huang ; Guo Chen ; Anping Liu ; Shuxia Wang ; Weijia Wen
- 刊名：Journal of Physical Chemistry C
- 出版年：2015
- 出版时间：August 20, 2015
- 年：2015
- 卷：119
- 期：33
- 页码：19376-19381
- 全文大小：431K
- ISSN：1932-7455
文摘
The electromagnetic field redistribution in metal nanostructure鈥揻ilm systems exhibits great capability of confining light on plain film, which has great significance in surface-enhanced Raman scattering (SERS) of a molecule on plain film or 2D material. In this work, the SERS spectra of a monolayer molecule on metal or dielectric film were investigated with the help of a metal nanoparticle鈥搉anowire structure. The results indicated that SERS intensity from an adjacent nanoparticle was much greater than that from an individual nanowire, which was confirmed by the simulated electric field distribution through finite method. The polarization dependence of both experimental and simulated data pointed out the importance of electromagnetic field redistribution in this phenomenon. Furthermore, the shape independence of a nanoparticle found in this work greatly improved the application prospect of this nanoparticle鈥搉anowire assisted SERS on film.