Tunable surface plasmon resonance of Au@Ag2S core–shell nanostructures containing voids

2009 ◽  
Vol 19 (46) ◽  
pp. 8871 ◽  
Author(s):  
Jinmiao Zhu ◽  
Yuhua Shen ◽  
Anjian Xie ◽  
Lin Zhu
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Core Shell ◽  
Shell Nanostructures

scholarly journals Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1728
Author(s):  
Joshua Fernandes ◽  
Sangmo Kang
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Aspect Ratio ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Shell Thickness ◽  
Numerical Study ◽  
Field Enhancement ◽  
Core Shell

The near-field enhancement and localized surface plasmon resonance (LSPR) on the core-shell noble metal nanostructure surfaces are widely studied for various biomedical applications. However, the study of the optical properties of new plasmonic non-spherical nanostructures is less explored. This numerical study quantifies the optical properties of spherical and non-spherical (prolate and oblate) dimer nanostructures by introducing finite element modelling in COMSOL Multiphysics. The surface plasmon resonance peaks of gold nanostructures should be understood and controlled for use in biological applications such as photothermal therapy and drug delivery. In this study, we find that non-spherical prolate and oblate gold dimers give excellent tunability in a wide range of biological windows. The electromagnetic field enhancement and surface plasmon resonance peak can be tuned by varying the aspect ratio of non-spherical nanostructures, the refractive index of the surrounding medium, shell thickness, and the distance of separation between nanostructures. The absorption spectra exhibit considerably greater dependency on the aspect ratio and refractive index than the shell thickness and separation distance. These results may be essential for applying the spherical and non-spherical nanostructures to various absorption-based applications.

scholarly journals Tuning of Localized Surface Plasmon Resonance in Copper-Copper Oxide Core-Shell Quantum Dots for the Application in Biosensors

2020 ◽  
Author(s):  
Prabhash Prasannan Geetha ◽  
Ajith Ramachandran ◽  
Swapna S. Nair
Keyword(s):  
Quantum Dots ◽  
Surface Plasmon Resonance ◽  
Copper Oxide ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Particle Diameter ◽  
Noble Metal Nanoparticles ◽  
Localized Surface Plasmon ◽  
Core Shell ◽  
Chemical Route

Surface Plasmon Resonance (SPR) is an attracting property of certain transition metals when they are synthesized in nano-range giving rise to promising optical applications. However, most SPR and associated applications are limited to the noble metal nanoparticles, which limits their potential due to high production cost. We report surface plasmon resonance in copper-copper oxide core-shell quantum dots synthesized via chemical route studied by using UV-Visible spectrophotometry. Tuning of the plasmonic resonance with respect to the particle diameter is achieved by an inexpensive all chemical route. Photoluminescence measurements also support the data. This size reduction leads to remarkable changes in its optical response as compared to the bulk metal. The results point towards applications of these materials in tunable SPR based biosensors.

Influence of dimensionality and crystallization on visible-light hydrogen production of Au@TiO2 core–shell photocatalysts based on localized surface plasmon resonance

2018 ◽  
Vol 8 (4) ◽  
pp. 1094-1103 ◽  
Author(s):  
Bing Liu ◽  
Yan Jiang ◽  
Yin Wang ◽  
Shuxia Shang ◽  
Yuanman Ni ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Surface Plasmon Resonance ◽  
Hydrogen Production ◽  
Visible Light ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Core Shell

We synthesized four Au@TiO2 nanostructures, which exhibit dimensionality- and crystallinity-dependent photocatalytic activity towards H2 generation.

Grating-based surface plasmon resonance detection of core-shell nanoparticle mediated DNA hybridization

2012 ◽  
Vol 32 (1) ◽  
pp. 141-147 ◽  
Author(s):  
Seyoung Moon ◽  
Yonghwi Kim ◽  
Youngjin Oh ◽  
Hosub Lee ◽  
Hyun Chang Kim ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Dna Hybridization ◽  
Core Shell ◽  
Resonance Detection
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