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Issue 34, 2010
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Spontaneous electron transfer from C60 to Au ions: oxidation of C60 and hole doping

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Abstract

Spontaneous oxidation of C60 by Au ions was observed. When C60 was guided to make contacts with Au3+ ions in aqueous HAuCl4 solution, electrons were spontaneously transferred from C60 to Au3+ ions, resulting in hole (h+) doped C60 cations and Au nanoparticles on a C60 layer. This spontaneous electron transfer occurs due to the galvanic displacement from C60 to Au3+ ions owing to the energy difference between Fermi energy level of C60 (−4.7 eV) and standard reduction potential of Au3+ ion (+1.002 V). The oxidation of C60 as well as the consequent formation of reduced Au nanoparticles were confirmed by atomic force microscopy, X-ray photoelectron spectroscopy, and electrochemistry. The switch of majority charge carrier type from electron to hole and its stability in air were also confirmed by monitoring IVg characteristic curves of a C60 field effect transistor (FET) device before and after the reaction with Au3+ ions.

Graphical abstract: Spontaneous electron transfer from C60 to Au ions: oxidation of C60 and hole doping

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Publication details

The article was received on 22 Mar 2010, accepted on 08 Jun 2010 and first published on 29 Jul 2010


Article type: Paper
DOI: 10.1039/C0JM00783H
Citation: J. Mater. Chem., 2010,20, 7183-7188
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    Spontaneous electron transfer from C60 to Au ions: oxidation of C60 and hole doping

    H. S. Shin, H. Lim, H. J. Song, H. Shin, S. Park and H. C. Choi, J. Mater. Chem., 2010, 20, 7183
    DOI: 10.1039/C0JM00783H

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