Determining Molecular Orientation With Surface-Enhanced Raman Scattering Using Inhomogenous Electric Fields

2013 ◽  
Vol 117 (38) ◽  
pp. 19622-19631 ◽  
Author(s):  
Dhabih V. Chulhai ◽  
Lasse Jensen
Keyword(s):  
Raman Scattering ◽  
Electric Fields ◽  
Molecular Orientation ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Local Electric Field Enhancement of Neighboring Ag Nanoparticles in Surface Enhanced Raman Scattering

2013 ◽  
Vol 760-762 ◽  
pp. 801-805 ◽  
Author(s):  
Chao Yue Deng ◽  
Gu Ling Zhang ◽  
Bin Zou ◽  
Hong Long Shi ◽  
Yu Jie Liang ◽  
...  
Keyword(s):  
Electric Field ◽  
Raman Scattering ◽  
Electric Fields ◽  
Ag Nanoparticles ◽  
Surface Enhanced Raman Scattering ◽  
Ag Nps ◽  
Sers Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

We used a simple low-temperature hydrothermal approach to synthesize Ag nanoparticles (NPs) 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.

Dynamic plasmonic nano-traps for single molecule surface-enhanced Raman scattering

Nanoscale ◽  
2017 ◽  
Vol 9 (30) ◽  
pp. 10694-10700 ◽  
Author(s):  
Yuquan Zhang ◽  
Junfeng Shen ◽  
Zhenwei Xie ◽  
Xiujie Dou ◽  
Changjun Min ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Electric Fields ◽  
Single Molecule ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Sers Detection ◽  
Enhanced Raman Scattering ◽  
Molecule Surface

Intense electric fields at the nanoscale are essential for single molecule surface-enhanced Raman scattering (SERS) detection.

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