Blue-Shifted Narrow Localized Surface Plasmon Resonance from Dipole Coupling in Gold Nanoparticle Random Arrays

2014 ◽  
Vol 118 (45) ◽  
pp. 26276-26283 ◽  
Author(s):  
Julie A. Jenkins ◽  
Yadong Zhou ◽  
Sravan Thota ◽  
Xiangdong Tian ◽  
Xiaowen Zhao ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Dipole Coupling ◽  
Random Arrays

Saturable scattering of localized surface plasmon resonance in a single gold nanoparticle

2012 ◽  
Author(s):  
Tung-Yu Su ◽  
Yasuo Yonemaru ◽  
Masahito Yamanaka ◽  
Ming-Ying Lee ◽  
Hsuan Lee ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon

scholarly journals Gold Nanoparticle-Enhanced Detection of DNA Hybridization by a Block Copolymer-Templating Fiber-Optic Localized Surface Plasmon Resonance Biosensor

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 616
Author(s):  
Mengdi Lu ◽  
Ming Lin ◽  
Fang Wang ◽  
Yang Zhang ◽  
Wei Peng
Keyword(s):  
Surface Plasmon Resonance ◽  
Block Copolymer ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Fiber Optic ◽  
Localized Surface Plasmon ◽  
Decay Length ◽  
Self Assembled

To overcome low surface coverage and aggregation of particles, which usually restricts the sensitivity and resolution of conventional localized surface plasmon resonance (LSPR) fiber-optic sensors, we propose a simple self-assembled templating technique that uses a nanometer thickness block copolymer (BCP) layer of poly(styrene-b-4-vinylpyridine) to form a 33 nm gold nanoparticle (AuNP) monolayer with high uniformity and density for LSPR sensing. The LSPR resonance wavelength for this PS-b-P4VP templated methodology is 592 nm and its refractive index sensitivity is up to 386.36 nm/RIU, both of which are significantly improved compared to those of conventional LSPR techniques. Calibrated by a layer-by-layer polyelectrolyte deposition procedure, the decay length of this LSPR sensor is calculated to be 78 nm, which is lower than other traditional self-assembled LSPR sensors. Furthermore, hybridization between target ssDNA, which is linked with capture ssDNA on the LSPR biosensor and DNA–AuNP conjugates, leads to a low detection limit of 67 pM. These enhanced performances are significant and valuable for high-sensitivity and cost-effective LSPR biosensing applications.

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