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Issue 16, 2012
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Size-controllable synthesis of surface-enhanced Raman scattering-active gold nanoparticles coated on TiO2

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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.

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

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Publication details

The article was received on 26 Feb 2012, accepted on 18 Jun 2012 and first published on 19 Jun 2012


Article type: Paper
DOI: 10.1039/C2AN35269A
Citation: Analyst, 2012,137, 3847-3853
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    Size-controllable synthesis of surface-enhanced Raman scattering-active gold nanoparticles coated on TiO2

    T. Kuo, T. Hsu, Y. Liu and K. Yang, Analyst, 2012, 137, 3847
    DOI: 10.1039/C2AN35269A

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