Surface-enhanced Raman spectroscopy and localized surface plasmon resonance detection of hydrogen peroxide using plasmonic gels

2019 ◽  
Author(s):  
Yun-Chu Chen ◽  
Kuan-Ying Chen ◽  
Kuo-Hsiu Hsu ◽  
Yih-Fan Chen
Keyword(s):  
Hydrogen Peroxide ◽  
Raman Spectroscopy ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Localized Surface Plasmon Resonance ◽  
Surface Enhanced Raman Spectroscopy ◽  
Localized Surface Plasmon ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Resonance Detection

scholarly journals Tuning Localized Surface Plasmon Resonance of Nanoporous Gold with a Silica Shell for Surface Enhanced Raman Scattering

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 251 ◽  
Author(s):  
Wei Li ◽  
Chao Ma ◽  
Ling Zhang ◽  
Bin Chen ◽  
Luyang Chen ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Localized Surface Plasmon Resonance ◽  
Silica Coating ◽  
Silica Shell ◽  
Nanoporous Gold ◽  
Localized Surface Plasmon ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

We report the tuning of localized surface plasmon resonance (LSPR) of nanoporous gold (NPG) by silica coating, which also affects the surface enhanced Raman scattering (SERS) of NPG. In this study, controllable silica shell is assembled on the NPG surface, and a fully silica thin layer causes more than 50 nm red-shift of LSPR band due to dielectric medium dependence. Additionally, ~1 nm silica coated NPG film shows excellent SERS enhancement, which is due to electromagnetic coupling between ligaments and local surface plasmon field enhancement within pores, and theoretical analysis indicates that silica coating further improves the coupling effect, which demonstrates the electromagnetic origin of the tuning of SERS effect.

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