title: Optimization of gold nanoparticle photoluminescence by alkanethiolation.
abstract: Surface thiolation affects the size of gold nanoparticles and the presence of visible luminescence under UV stimulation. We explored these phenomena by analysing alkanethiolate coatings with different carbon chain lengths, from 3-mercaptopropionic acid to 16-mercaptohexadecanoic acid, synthesized by intense X-ray irradiation. Photoluminescence is present for the smallest nanoparticles, but its intensity becomes more intense as the carbon chain length increases, achieving a quantum efficiency of 28% with a 16-mercaptohexadecanoic acid coating.
authors: Department of Engineering Science, National Cheng Kung University, Tainan 701, Taiwan.
authors: Sheng-Feng
authors: SF
authors: Lai
authors: Hui-Ru
authors: HR
authors: Tan
authors: Eng Soon
authors: ES
authors: Tok
authors: Yu-Han
authors: YH
authors: Chen
authors: Edwin B L
authors: EB
authors: Ong
authors: Min-Tsang
authors: MT
authors: Li
authors: Yi-Yun
authors: YY
authors: Chen
authors: Fan-Ching
authors: FC
authors: Chien
authors: Peilin
authors: P
authors: Chen
authors: G
authors: G
authors: Margaritondo
authors: Y
authors: Y
authors: Hwu