Surface-enhanced Raman scattering-active silver nanostructures with two domains

Chun Chao Chang, Kuang Hsuan Yang, Yu Chuan Liu, Chung Chin Yu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Generally, a controllable and reproduced surface roughness for surface-enhanced Raman scattering (SERS) studies can be generated through control of the electrochemical oxidation-reduction cycles (ORC) procedure. In this work, we propose a new sonoelectrochemical approach to prepare SERS-active substrates with two domain-Ag nanostructures. The method is based on a strategy of deposition-dissolution cycles (DDCs) by using a cathodic overpotential and an anodic overpotential from open circuit potential (OCP) in turn under sonication. The prepared SERS-active substrate demonstrates large Raman scattering enhancement for adsorbed Rhodamine 6G (R6G) with an enhancement factor of 2.3×10 8 and a limit of detection of 2×10 -13M. The improved SERS performances can be successfully explained from the viewpoints of electromagnetic (EM) and chemical (CHEM) enhancements.

Original languageEnglish
Pages (from-to)91-97
Number of pages7
JournalAnalytica Chimica Acta
Volume709
DOIs
Publication statusPublished - Jan 4 2012

    Fingerprint

Keywords

  • Ag nanostructures
  • Limit of detection
  • Sonoelectrochemical methods
  • Surface-enhanced Raman scattering

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

Cite this