Optimization of gold nanoparticle photoluminescence by alkanethiolation

Sheng Feng Lai, Hui Ru Tan, Eng Soon Tok, Yu Han Chen, Edwin B.L. Ong, Min Tsang Li, Yi Yun Chen, Fan Ching Chien, Peilin Chen, G. Margaritondo, Y. Hwu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

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.

Original languageEnglish
Pages (from-to)7954-7957
Number of pages4
JournalChemical Communications
Volume51
Issue number37
DOIs
StatePublished - 7 May 2015

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