title: Surface-enhanced Raman scattering of graphene with photo-assisted-synthesized gold nanoparticles.
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 AuCl(4)(-) 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.
authors.affiliation: Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Cheng-En
authors.initials: CE
authors.lastname: Cheng
authors.forename: Chi-Yuan
authors.initials: CY
authors.lastname: Lin
authors.forename: Hao-Yu
authors.initials: HY
authors.lastname: Chang
authors.forename: Chen-Han
authors.initials: CH
authors.lastname: Huang
authors.forename: Hsing-Ying
authors.initials: HY
authors.lastname: Lin
authors.forename: Chia-Hao
authors.initials: CH
authors.lastname: Chen
authors.forename: Chia-Chen
authors.initials: CC
authors.lastname: Hsu
authors.forename: Chen-Shiung
authors.initials: CS
authors.lastname: Chang
authors.forename: Forest Shih
authors.initials: FS
authors.lastname: Sen Chien