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

doi:10.1039/c3tc32376e

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 journal › Article › peer-review

80 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 language	English
Pages (from-to)	3826-3834
Number of pages	9
Journal	Journal of Materials Chemistry C
Volume	2
Issue number	19
DOIs	https://doi.org/10.1039/c3tc32376e
Publication status	Published - 21 May 2014
Externally published	Yes

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

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.",

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

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T1 - Ultrafast electron transfer in the nanocomposite of the graphene oxide-Au nanocluster with graphene oxide as a donor

AU - Wen, Xiaoming

AU - Yu, Pyng

AU - Toh, Yon-Rui

AU - Lee, Yu-Chieh

AU - Huang, Kuo-Yen

AU - Huang, Shujuan

AU - Shrestha, Santosh

AU - Conibeer, Gavin

AU - Tang, Jau

PY - 2014/5/21

Y1 - 2014/5/21

N2 - 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.

AB - 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.

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

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