Facile electrochemical surface-alloying and etching of Au wires to enable high-performance substrates for surface enhanced Raman scattering

Yawen Zhan; Guobin Zhang; Junda Shen; Binbin Zhou; Chenghao Zhao; Junmei Guo; Ming Wen; Zhilong Tan; Lirong Zheng; Jian Lu; Yang Yang Li

doi:10.1016/j.nanoms.2023.05.002

Facile electrochemical surface-alloying and etching of Au wires to enable high-performance substrates for surface enhanced Raman scattering

Yawen Zhan, Guobin Zhang, Junda Shen, Binbin Zhou, Chenghao Zhao, Junmei Guo, Ming Wen, Zhilong Tan, Lirong Zheng^*, Jian Lu^*, Yang Yang Li^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

5 Citations (Scopus)

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Abstract

Surface-enhanced Raman Spectroscopy (SERS) is a nondestructive technique for rapid detection of analytes even at the single-molecule level. However, highly sensitive and reliable SERS substrates are mostly fabricated with complex nanofabrication techniques, greatly restricting their practical applications. A convenient electrochemical method for transforming the surface of commercial gold wires/foils into silver-alloyed nanostructures is demonstrated in this report. Au substrates are treated with repetitive anodic and cathodic bias in an electrolyte of thiourea, in a one-pot one-step manner. X-rays absorption fine structure (XAFS) spectroscopy confirms that the AuAg alloy is induced at the surface. The unique AuAg alloyed surface nanostructures are particularly advantageous when served as SERS substrates, enabling a remarkably sensitive detection of Rhodamine B (a detection limit of 10⁻¹⁴ M, and uniform strong response throughout the substrates at 10⁻¹² M). © 2023 Chongqing University

Original language	English
Pages (from-to)	305-311
Journal	Nano Materials Science
Volume	6
Issue number	3
Online published	14 Sept 2023
DOIs	https://doi.org/10.1016/j.nanoms.2023.05.002
Publication status	Published - Jun 2024

Research Keywords

Dealloying
Electrodeposition
Noble metals
Surface enhanced Raman spectroscopy substrates
Surface-alloyed

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title = "Facile electrochemical surface-alloying and etching of Au wires to enable high-performance substrates for surface enhanced Raman scattering",

abstract = "Surface-enhanced Raman Spectroscopy (SERS) is a nondestructive technique for rapid detection of analytes even at the single-molecule level. However, highly sensitive and reliable SERS substrates are mostly fabricated with complex nanofabrication techniques, greatly restricting their practical applications. A convenient electrochemical method for transforming the surface of commercial gold wires/foils into silver-alloyed nanostructures is demonstrated in this report. Au substrates are treated with repetitive anodic and cathodic bias in an electrolyte of thiourea, in a one-pot one-step manner. X-rays absorption fine structure (XAFS) spectroscopy confirms that the AuAg alloy is induced at the surface. The unique AuAg alloyed surface nanostructures are particularly advantageous when served as SERS substrates, enabling a remarkably sensitive detection of Rhodamine B (a detection limit of 10−14 M, and uniform strong response throughout the substrates at 10−12 M). {\textcopyright} 2023 Chongqing University",

keywords = "Dealloying, Electrodeposition, Noble metals, Surface enhanced Raman spectroscopy substrates, Surface-alloyed",

author = "Yawen Zhan and Guobin Zhang and Junda Shen and Binbin Zhou and Chenghao Zhao and Junmei Guo and Ming Wen and Zhilong Tan and Lirong Zheng and Jian Lu and Li, {Yang Yang}",

year = "2024",

month = jun,

doi = "10.1016/j.nanoms.2023.05.002",

language = "English",

volume = "6",

pages = "305--311",

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}

TY - JOUR

T1 - Facile electrochemical surface-alloying and etching of Au wires to enable high-performance substrates for surface enhanced Raman scattering

AU - Zhan, Yawen

AU - Zhang, Guobin

AU - Shen, Junda

AU - Zhou, Binbin

AU - Zhao, Chenghao

AU - Guo, Junmei

AU - Wen, Ming

AU - Tan, Zhilong

AU - Zheng, Lirong

AU - Lu, Jian

AU - Li, Yang Yang

PY - 2024/6

Y1 - 2024/6

N2 - Surface-enhanced Raman Spectroscopy (SERS) is a nondestructive technique for rapid detection of analytes even at the single-molecule level. However, highly sensitive and reliable SERS substrates are mostly fabricated with complex nanofabrication techniques, greatly restricting their practical applications. A convenient electrochemical method for transforming the surface of commercial gold wires/foils into silver-alloyed nanostructures is demonstrated in this report. Au substrates are treated with repetitive anodic and cathodic bias in an electrolyte of thiourea, in a one-pot one-step manner. X-rays absorption fine structure (XAFS) spectroscopy confirms that the AuAg alloy is induced at the surface. The unique AuAg alloyed surface nanostructures are particularly advantageous when served as SERS substrates, enabling a remarkably sensitive detection of Rhodamine B (a detection limit of 10−14 M, and uniform strong response throughout the substrates at 10−12 M). © 2023 Chongqing University

AB - Surface-enhanced Raman Spectroscopy (SERS) is a nondestructive technique for rapid detection of analytes even at the single-molecule level. However, highly sensitive and reliable SERS substrates are mostly fabricated with complex nanofabrication techniques, greatly restricting their practical applications. A convenient electrochemical method for transforming the surface of commercial gold wires/foils into silver-alloyed nanostructures is demonstrated in this report. Au substrates are treated with repetitive anodic and cathodic bias in an electrolyte of thiourea, in a one-pot one-step manner. X-rays absorption fine structure (XAFS) spectroscopy confirms that the AuAg alloy is induced at the surface. The unique AuAg alloyed surface nanostructures are particularly advantageous when served as SERS substrates, enabling a remarkably sensitive detection of Rhodamine B (a detection limit of 10−14 M, and uniform strong response throughout the substrates at 10−12 M). © 2023 Chongqing University

KW - Dealloying

KW - Electrodeposition

KW - Noble metals

KW - Surface enhanced Raman spectroscopy substrates

KW - Surface-alloyed

UR - http://www.scopus.com/inward/record.url?scp=85172872341&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85172872341&origin=recordpage

U2 - 10.1016/j.nanoms.2023.05.002

DO - 10.1016/j.nanoms.2023.05.002

M3 - RGC 21 - Publication in refereed journal

SN - 2096-6482

VL - 6

SP - 305

EP - 311

JO - Nano Materials Science

JF - Nano Materials Science

IS - 3

ER -

Facile electrochemical surface-alloying and etching of Au wires to enable high-performance substrates for surface enhanced Raman scattering

Abstract

Research Keywords

Publisher's Copyright Statement

UN SDGs

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