Electric field-induced adsorption change of 1,3,5-benzenetricarboxylic acid on gold, silver, and copper electrode surfaces investigated by surface-enhanced Raman scattering

2008 ◽  
Vol 878 (1-3) ◽  
pp. 155-161 ◽  
Author(s):  
Youngmin Kim ◽  
Kyungnam Cho ◽  
Kangtaek Lee ◽  
Jaebum Choo ◽  
Myoung-seon Gong ◽  
...  
Keyword(s):  
Electric Field ◽  
Raman Scattering ◽  
Copper Electrode ◽  
Electrode Surfaces ◽  
Gold Silver ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Benzenetricarboxylic Acid ◽  
Induced Adsorption

scholarly journals Study on surface enhanced Raman scattering of Au and Au@Al2O3 spherical dimers based on 3D finite element method

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bao-xin Yan ◽  
Yan-ying Zhu ◽  
Yong Wei ◽  
Huan Pei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Field ◽  
Raman Scattering ◽  
Enhancement Factor ◽  
Field Enhancement ◽  
Electric Field Enhancement ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

AbstractIn this paper, the surface enhanced Raman scattering (SERS) characteristics of Au and Au@Al2O3 nanoparticle dimers were calculated and analyzed by using finite element method (3D-FEM). Firstly, the electric field enhancement factors of Au nanoparticles at the dimer gap were optimized from three aspects: the incident angle of the incident light, the radius of nanoparticle and the distance of the dimer. Then, aluminum oxide is wrapped on the Au dimer. What is different from the previous simulation is that Al2O3 shell and Au core are regarded as a whole and the total radius of Au@Al2O3 dimer is controlled to remain unchanged. By comparing the distance of Au nucleus between Au and Au@Al2O3 dimer, it is found that the electric field enhancement factor of Au@Al2O3 dimer is much greater than that of Au dimer with the increase of Al2O3 thickness. The peak of electric field of Au@Al2O3 dimer moves towards the middle of the resonance peak of the two materials, and it is more concentrated than that of the Au dimer. The maximum electric field enhancement factor 583 is reached at the shell thickness of 1 nm. Our results provide a theoretical reference for the design of SERS substrate and the extension of the research scope.

Surface-enhanced Raman scattering from bare Fe electrode surfaces

2000 ◽  
Vol 316 (1-2) ◽  
pp. 1-5 ◽  
Author(s):  
P.G. Cao ◽  
J.L. Yao ◽  
B. Ren ◽  
B.W. Mao ◽  
R.A. Gu ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Electrode Surfaces ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

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.

Sign in / Sign up

Export Citation Format

Share Document