Gold nanospirals

Yu Hsu Chang*, Yu Chuan Wu, Ya Ting Hsu, Shih Hao Huang, Yi Chin Huang, Hsin-Tien Chiu

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

This study used a galvanic displacement reaction for aluminum-gold oxidation-reduction and added surfactants to act as capping agents to control the morphology and size of gold growth. Three surfactants, namely cetyltrimethylammonium bromide, polyvinylpyrrolidone, and poly(ethylene glycol)(12) tridecyl ether, were added to HAuCl4 (aq.) to create novel gold nanospirals (AuNSs) 200-500 nm in diameter and tens of μm in length. Transmission electron microscopy analysis showed that the AuNSs were face-centered cubic in structure and that growths on the {111} facet were growth twins with mirror symmetry. Used as the base material for surface-enhanced Raman scattering, the structure of the trunk and dendrimers of the AuNSs create numerous hot spots, exhibiting a superior surface enhancement effect.

Original languageEnglish
Pages (from-to)75268-75271
Number of pages4
JournalRSC Advances
Volume5
Issue number92
DOIs
StatePublished - 1 Sep 2015

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    Chang, Y. H., Wu, Y. C., Hsu, Y. T., Huang, S. H., Huang, Y. C., & Chiu, H-T. (2015). Gold nanospirals. RSC Advances, 5(92), 75268-75271. https://doi.org/10.1039/c5ra11492f