Facile synthesis of spinous-like Au nanostructures for unique localized surface plasmon resonance and surface-enhanced Raman scattering

2015 ◽  
Vol 39 (4) ◽  
pp. 2551-2556 ◽  
Author(s):  
Yan Zhang ◽  
Bingyu Wang ◽  
Shihe Yang ◽  
Lidong Li ◽  
Lin Guo
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Localized Surface Plasmon Resonance ◽  
Gold Nanostructures ◽  
Localized Surface Plasmon ◽  
Facile Synthesis ◽  
Wet Chemistry ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Spinous-like gold nanostructures were prepared using a wet chemistry method, and the intensities of the UV-Vis and SERS signals of the nanostructures were determined to be greatly enhanced by the presence of the spinous shapes.

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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