Ultrafast electron transfer in the nanocomposite of the graphene oxide-Au nanocluster with graphene oxide as a donor

Xiaoming Wen*, Pyng Yu, Yon-Rui Toh, Yu-Chieh Lee, Kuo-Yen Huang, Shujuan Huang, Santosh Shrestha, Gavin Conibeer, Jau Tang

*Corresponding author for this work

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Graphene oxide has been extensively investigated as an electron acceptor due to its exceptional electronic and optical properties. Here we report an unusual ultrafast electron transfer occurring in the nanocomposites of Au nanocluster (Au NC)-graphene oxide (GO) in which GO acts as an electron donor. An ultrafast electron transfer is corroborated from the excited states of graphene oxide into the highest occupied molecular orbital (HOMO) of Au NCs. It is found that the electron transfer rate is significantly higher in Au 10-GO nanocomposites (4.17 × 1012 s-1) than that in Au25-GO (0.49 × 1012 s-1) due to a larger energy difference and smaller sized ligands. This finding suggests that graphene oxide-Au nanocluster nanocomposites can be very useful to construct novel nanostructures with enhanced visible light photovoltaic, photonic and photo-catalytic activities.

Original languageEnglish
Pages (from-to)3826-3834
Number of pages9
JournalJournal of Materials Chemistry C
Volume2
Issue number19
DOIs
Publication statusPublished - 21 May 2014
Externally publishedYes

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