Dependence between the Refractive-Index Sensitivity of Metallic Nanoparticles and the Spectral Position of Their Localized Surface Plasmon Band: A Numerical and Analytical Study

2015 ◽  
Vol 119 (51) ◽  
pp. 28551-28559 ◽  
Author(s):  
Ophélie Saison-Francioso ◽  
Gaëtan Lévêque ◽  
Rabah Boukherroub ◽  
Sabine Szunerits ◽  
Abdellatif Akjouj
Keyword(s):  
Refractive Index ◽  
Surface Plasmon ◽  
Metallic Nanoparticles ◽  
Analytical Study ◽  
Localized Surface Plasmon ◽  
Spectral Position ◽  
Surface Plasmon Band ◽  
Refractive Index Sensitivity ◽  
Plasmon Band ◽  
Index Sensitivity

Nano-thick-dielectric encapsulation effects on the refractive index sensitivities of Ag plane-nanosphere-cluster sensors

2018 ◽  
Vol 32 (08) ◽  
pp. 1850080 ◽  
Author(s):  
Chao Ling Du ◽  
Wan Chun Yang ◽  
Sheng Peng ◽  
Da Ning Shi
Keyword(s):  
Refractive Index ◽  
Localized Surface Plasmon ◽  
Great Promise ◽  
Sers Substrate ◽  
Refractive Index Sensitivity ◽  
Surface Enhanced Raman ◽  
Equilateral Triangles ◽  
Quadratic Response ◽  
The Stability ◽  
Index Sensitivity

The nano-thick-dielectric encapsulation effects on the bulk and local refractive index sensitivity behaviors of Ag plane-nanosphere-cluster sensors (including nanosphere monomers, dimers, trimer chains and trimer equilateral triangles, four kinds of normally encountered nanoparticles in experiments) have been numerically investigated by finite element method (FEM). The encapsulation is revealed to decrease the quadratic magnitude of the refractive index responses of their peak wavelengths of localized surface plasmon resonances (LSPR), while it does not violate such quadratic response natures. Its effect on their capabilities of surface enhanced Raman scattering (SERS) behaviors is discussed too. It is demonstrated to provide an efficient type of SERS substrate for plasmonic sensing and detections, which improves the stability of the concerned nanoparticles, and not diminish their SERS signals, in agreement well with experiments under the same nanostructure parameters. This work holds great promise for further designing SERS-based sensing/detecting substrates and sensors/detectors.

scholarly journals Double-exponential refractive index sensitivity of metal–semiconductor core–shell nanoparticles: the effects of dual-plasmon resonances and red-shift

RSC Advances ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 1700-1705 ◽  
Author(s):  
Hailong Zhang ◽  
Pengfei Cao ◽  
Jie Dou ◽  
Lin Cheng ◽  
Tiaoming Niu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Red Shift ◽  
Localized Surface Plasmon ◽  
Core Shell ◽  
Refractive Index Sensitivity ◽  
Shell Nanoparticles ◽  
Double Exponential ◽  
New Type ◽  
Index Sensitivity ◽  
Core Shell Nanoparticles

We present a new type of localized surface plasmon resonance (LSPR) sensor whose refractive index sensitivity can be improved by greatly increasing the plasmon wavelength red-shift of metal–semiconductor core–shell nanoparticles (CSNs).

Effect of clustering on the surface plasmon band in thin films of metallic nanoparticles

2014 ◽  
Vol 9 (1) ◽  
pp. 093796 ◽  
Author(s):  
Rui M. S. Pereira ◽  
Joel Borges ◽  
Filipa C. R. Peres ◽  
Paulo A. S. Pereira ◽  
Georgi V. Smirnov ◽  
...  
Keyword(s):  
Thin Films ◽  
Surface Plasmon ◽  
Metallic Nanoparticles ◽  
Surface Plasmon Band ◽  
Plasmon Band
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