Surface-enhanced Raman scattering of graphene with photo-assisted- synthesized gold nanoparticles

Cheng En Cheng, Chi Yuan Lin, Hao Yu Chang, Chen Han Huang, Hsing Ying Lin, Chia Hao Chen, Chia Chen Hsu, Chen Shiung Chang, Forest Shih Sen Chien

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

This paper presents a convenient and reliable method to prepare gold nanoparticles (AuNPs) on graphene. Photo-assisted synthesis (PAS) was employed to grow AuNPs in AuCl4 - electrolyte on graphene. The size of AuNPs could be as large as 130 nm. This optical method had a steady growth rate of AuNPs. The distribution of AuNPs was well controlled by focusing the laser for PAS. The minimum diameter of the distribution was approximately 1 μm. Surface-enhanced Raman scattering of graphene due to AuNPs was observed. Electrical fields near AuNPs calculated by the finite-difference time-domain algorithm ensured that the Raman enhancement was attributed to the localized surface plasmons of AuNPs.

Original languageEnglish
Pages (from-to)6547-6554
Number of pages8
JournalOptics Express
Volume21
Issue number5
DOIs
StatePublished - 11 Mar 2013

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