Al2O3-modified surface-enhanced Raman scattering-active gold nanoparticles on substrates by using sonoelectrochemical pulse deposition

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

As shown in the literature, many methods have been developed to improve signals, reproducibility and stabilities of surface-enhanced Raman scattering (SERS) for their reliable applications. However, the fabrication can be laborious. In this work, we propose a simple pathway to prepare SERS-active substrates with Al2O3-modified Au nanoparticles (NPs) by sonoelectrochemical deposition-dissolution cycles (SEDDCs). Based on probe molecules of Rhodamine 6G (R6G), an enhancement factor of 4.4 × 10 8 and a detection limit of 2 × 10-14 M were observed on the proposed SERS-active substrates. The reproducibility and stabilities of the proposed SERS-active substrates are satisfactory. Also, the prepared Al 2O3-modified Au NPs-deposited substrate can markedly improve the thermal stability by raising the operation temperature over 50 C, as compared with unmodified Au NPs-deposited substrate. Meanwhile, aging of SERS effect observed on this proposed substrate is slight in an atmosphere of 50% RH and 20% (v/v) O2 at 30°C for 60 day.

Original languageEnglish
Pages (from-to)38-44
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume696
DOIs
Publication statusPublished - 2013

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Keywords

  • Detection limit
  • Electrochemical methods
  • Modification
  • Surface-enhanced Raman scattering

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

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