Size-controllable synthesis of surface-enhanced Raman scattering-active gold nanoparticles coated on TiO2

Tai Chih Kuo, Ting Chu Hsu, Yu Chuan Liu, Kuang Hsuan Yang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

As shown in the literature, gold nanoparticles (NPs) were popularly used in the fields of catalyst and surface-enhanced Raman scattering (SERS). In this work, size-controllable Au NPs coated on TiO2 are synthesized by adjusting the pH of solutions based on sonoelectrochemical methods. The size-controlled Au NPs on TiO2, ranging from 2 to 80 nm in diameter, can be obtained by varying the pH of solutions from 3 to 7 and placing the sample for 3 h before sonoelectrochemical reductions. The optimal particle sizes of Au NPs on TiO2 to obtain the strongest SERS effects under an irradiation of 785 nm for probe molecules of adsorbed Rhodamine 6G (R6G) and deposited polypyrrole (PPy) are all ca. 60 nm.

Original languageEnglish
Pages (from-to)3847-3853
Number of pages7
JournalAnalyst
Volume137
Issue number16
DOIs
Publication statusPublished - Aug 21 2012

    Fingerprint

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Electrochemistry
  • Biochemistry
  • Environmental Chemistry

Cite this