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Issue 22, 2011
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Graphene uniformly decorated with gold nanodots: in situ synthesis, enhanced dispersibility and applications

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Abstract

Graphene sheets decorated with metal nanoparticles are emerging novel graphene-based hybrids for tuning the intrinsic properties of both components for fundamental research and technological applications. Here we report a new wet-chemistry strategy to efficiently and uniformly decorate reduced graphene oxide (RGO) with unique gold nanodots (GNDs). Non-covalent self-assembly of a perylene thiol derivative (ETPTCDI) on the basal plane of GO forms graphene by reducing the dispersed GO and serves as an excellent two-dimensional template in solution for in situ nucleation and growth of gold nanodots via thiol-Au bonding. We characterized the resulting RGO-ETPTCDI-GND in detail and confirm that the Au nanodots with unique size (∼2 nm) decorate the RGO-ETPTCDI sheets uniformly due to the self-assembly of ETPTCDI molecules on the basal plane of graphene. We demonstrate that our RGO-ETPTCDI-GND sheets have astonishing dispersibility, reliability, and processibility. The uniform decoration of the ∼2 nm GNDs on the graphene surface makes it possible to use the nanodots as a contrast enhancement agent for easily revealing the fine structure of the graphene surface. The electrochemical activity of our RGO-ETPTCDI-GND modified glassy carbon electrode showed significant improvement, suggesting RGO-ETPTCDI-GND as an attractive robust and advanced hybrid electrode material with great promise for electrochemical sensors and energy conversion.

Graphical abstract: Graphene uniformly decorated with gold nanodots: in situ synthesis, enhanced dispersibility and applications

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Publication details

The article was received on 16 Feb 2011, accepted on 18 Mar 2011 and first published on 20 Apr 2011


Article type: Paper
DOI: 10.1039/C1JM10697J
Citation: J. Mater. Chem., 2011,21, 8096-8103
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    Graphene uniformly decorated with gold nanodots: in situ synthesis, enhanced dispersibility and applications

    X. Yang, M. Xu, W. Qiu, X. Chen, M. Deng, J. Zhang, H. Iwai, E. Watanabe and H. Chen, J. Mater. Chem., 2011, 21, 8096
    DOI: 10.1039/C1JM10697J

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