Hollow Gold−Silver Double-Shell Nanospheres:  Structure, Optical Absorption, and Surface-Enhanced Raman Scattering

2008 ◽  
Vol 112 (16) ◽  
pp. 6319-6329 ◽  
Author(s):  
Tammy Y. Olson ◽  
Adam M. Schwartzberg ◽  
Christine A. Orme ◽  
Chad E. Talley ◽  
Breanna O'Connell ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Gold Silver ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals Electrokinetically-Driven Assembly of Gold Colloids into Nanostructures for Surface-Enhanced Raman Scattering

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 661 ◽  
Author(s):  
Hannah Dies ◽  
Adam Bottomley ◽  
Danielle Lilly Nicholls ◽  
Kevin Stamplecoskie ◽  
Carlos Escobedo ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Ionic Composition ◽  
Surface Enhanced Raman Scattering ◽  
Gold Nanostructures ◽  
Field Frequency ◽  
Gold Colloids ◽  
Gold Silver ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Surface-enhanced Raman scattering (SERS) enables the highly sensitive detection of (bio)chemical analytes in fluid samples; however, its application requires nanostructured gold/silver substrates, which presents a significant technical challenge. Here, we develop and apply a novel method for producing gold nanostructures for SERS application via the alternating current (AC) electrokinetic assembly of gold nanoparticles into two intricate and frequency-dependent structures: (1) nanowires, and (2) branched “nanotrees”, that create extended sensing surfaces. We find that the growth of these nanostructures depends strongly on the parameters of the applied AC electric field (frequency and voltage) and ionic composition, specifically the electrical conductivity of the fluid. We demonstrate the sensing capabilities of these gold nanostructures via the chemical detection of rhodamine 6G, a Raman dye, and thiram, a toxic pesticide. Finally, we demonstrate how these SERS-active nanostructures can also be used as a concentration amplification device that can electrokinetically attract and specifically capture an analyte (here, streptavidin) onto the detection site.

scholarly journals Extrinsic surface-enhanced Raman scattering detection of influenza A virus enhanced by two-dimensional gold@silver core–shell nanoparticle arrays

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 97791-97799 ◽  
Author(s):  
Kullavadee Karn-orachai ◽  
Kenji Sakamoto ◽  
Rawiwan Laocharoensuk ◽  
Suwussa Bamrungsap ◽  
Sirirurg Songsivilai ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Influenza A ◽  
Surface Enhanced Raman Scattering ◽  
Nanoparticle Arrays ◽  
Direct Immunoassay ◽  
Gold Silver ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
2D Array

A surface enhanced Raman scattering (SERS) based biosensor using a direct immunoassay platform was demonstrated for influenza A detection. The sensitivity was improved ~4 times by using a well-tuned Au@Ag 2D array instead of a flat Au film.

Core–Shell Gold@Silver Nanorods of Varying Length for High Surface-Enhanced Raman Scattering Enhancement

2018 ◽  
Vol 1 (10) ◽  
pp. 5589-5600 ◽  
Author(s):  
Gourab Bhattacharjee ◽  
Maireyee Bhattacharya ◽  
Abhijit Roy ◽  
Dulal Senapati ◽  
Biswarup Satpati
Keyword(s):  
Raman Scattering ◽  
High Surface ◽  
Surface Enhanced Raman Scattering ◽  
Core Shell ◽  
Silver Nanorods ◽  
Gold Silver ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Varying Length ◽  
Enhanced Raman Scattering
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