Au Nanoparticle-Decorated TiO2 Nanowires for Surface Plasmon Resonance-Based Photoelectrochemical Bioassays with a Solid–Liquid–Air Triphase Interface

2021 ◽  
Vol 4 (9) ◽  
pp. 9401-9408
Author(s):  
Dandan Wang ◽  
Zhenyao Ding ◽  
Hang Zhou ◽  
Liping Chen ◽  
Xinjian Feng
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Au Nanoparticle ◽  
Tio2 Nanowires ◽  
Solid Liquid

Surface Plasmon Resonance Enhanced Real-Time Photoelectrochemical Protein Sensing by Gold Nanoparticle-Decorated TiO2 Nanowires

2014 ◽  
Vol 86 (13) ◽  
pp. 6633-6639 ◽  
Author(s):  
Peimei Da ◽  
Wenjie Li ◽  
Xuan Lin ◽  
Yongcheng Wang ◽  
Jing Tang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Real Time ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Tio2 Nanowires ◽  
Protein Sensing

Signal Enhancement of Surface Plasmon Resonance Based on Gold Nanoparticle-Antibody Complex for Immunoassay

2006 ◽  
Vol 6 (11) ◽  
pp. 3521-3525
Author(s):  
Woochang Lee ◽  
Byung-Keun Oh ◽  
Yong-Wan Kim ◽  
Jeong-Woo Choi
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Antibody Fragment ◽  
Signal Enhancement ◽  
Au Nanoparticle ◽  
Constant Size ◽  
Antibody Complex ◽  
Antibody Conjugate ◽  
Versus Antigen

In the immunoassay based on surface plasmon resonance (SPR) system, the signal enhancement was done by means of the conjugate of gold (Au) nanoparticle-antibody fragment. Antibody fragment was prepared for the improved immobilization based on Au-thiol interaction. Through the ellipsometric analysis on surface, the conjugation between Au and antibody fragment was performed in the oriented manner. The optimal fabrication conditions such as concentration and incubation time were determined for the constant size of the fabricated nanoparticle-antibody conjugate. Through the plot of SPR angle difference versus antigen concentration, the linear correlation was achieved, of which the detection limit was 100 fg/ml.

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