One-step growth of needle and dendritic gold nanostructures on silicon for surface enhanced Raman scattering

CrystEngComm ◽  
2012 ◽  
Vol 14 (4) ◽  
pp. 1241-1246 ◽  
Author(s):  
Abhishek Lahiri ◽  
Rui Wen ◽  
Surasak Kuimalee ◽  
Shin-ichiro Kobayashi ◽  
Hyonkook Park
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Gold Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
One Step ◽  
Enhanced Raman Scattering ◽  
Step Growth

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.

Suppression of Surface-Enhanced Raman Scattering on Gold Nanostructures by Metal Adhesion Layers

2016 ◽  
Vol 120 (33) ◽  
pp. 18756-18762 ◽  
Author(s):  
Loan Le Thi Ngoc ◽  
Tao Yuan ◽  
Naoto Oonishi ◽  
Jan van Nieuwkasteele ◽  
Albert van den Berg ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Gold Nanostructures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

One-Pot Synthesis of Coral-Shaped Gold Nanostructures for Surface-Enhanced Raman Scattering

2011 ◽  
Vol 14 ◽  
pp. 47-55 ◽  
Author(s):  
Jian Hui Yang ◽  
Dhiraj K. Sardar
Keyword(s):  
Raman Scattering ◽  
Ethylenediaminetetraacetic Acid ◽  
Chelating Agent ◽  
Surface Enhanced Raman Scattering ◽  
Gold Nanostructures ◽  
Molar Ratio ◽  
One Pot ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

In this work, a chelating agent, ethylenediaminetetraacetic acid (EDTA) was used for the controllable synthesis of gold nanostructures in aqueous solution. Coral-shaped Au nanostructures were synthesized by reducing HAuCl4 with EDTA. EDTA serves not only as a reducing agent but also as a particle capping agent in the formation of coral-shaped Au nanostructures. It is found that the molar ratio of HAuCl4:EDTA and reacted temperature play significant effects on the formation and growth of these novel nanostructures. These Au nanostructures could serve as highly sensitive and reproductive surface-enhanced Raman scattering (SERS) substrates for chemical and biological detection.

One-step sonoelectrochemical fabrication of gold nanoparticle/carbon nanosheet hybrids for efficient surface-enhanced Raman scattering

Nanoscale ◽  
2015 ◽  
Vol 7 (6) ◽  
pp. 2659-2666 ◽  
Author(s):  
Kaige Zhang ◽  
Su Yao ◽  
Gongke Li ◽  
Yuling Hu
Keyword(s):  
Raman Scattering ◽  
Gold Nanoparticle ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
One Step ◽  
Enhanced Raman Scattering

A simple, fast, reproducible and efficient one-step sonoelectrochemical method was successfully developed to prepare gold nanoparticle/carbon nanosheet (Au NP/CNS) hybrids, which show efficient surface-enhanced Raman scattering.

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