Surface-enhanced Raman scattering-active silver substrates electrochemically prepared in solutions containing bielectrolytes

Chun Chao Chang, Ting Chu Hsu, Yu Chuan Liu, Kuang Hsuan Yang

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In the electrochemical oxidation-reduction cycles (ORC) treatment for preparing surface-enhanced Raman scattering (SERS)-active substrates, chloride electrolyte was generally selected because this facilitates the metal dissolution-deposition process that is known to produce SERS-active roughened surfaces. In this work, SERS-active Ag substrates were electrochemically prepared in HCl solutions containing supplemental electrolytes of HNO 3. Encouragingly, the SERS of Rhodamine 6G (R6G) adsorbed on this developed Ag substrate exhibits a higher intensity by 15-fold of magnitude, as compared with that of R6G adsorbed on a roughened Ag substrate prepared in HCl solution. Moreover, limit of detection for probe molecules of R6G can be significantly reduced to 2 × 10 -15 M. Also, the significant improvements in thermal stability and anti-aging of SERS-active Ag substrates proposed in this work are observed.

Original languageEnglish
Pages (from-to)6660-6667
Number of pages8
JournalJournal of Materials Chemistry
Volume21
Issue number18
DOIs
Publication statusPublished - May 14 2011

    Fingerprint

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

Cite this