Selective Placement of Faceted Metal Tips on Semiconductor Nanorods

Authors

  • Hendrik Schlicke,

    1. Department of Chemistry, University of California Berkeley, Berkeley, CA 94720 (USA)
    2. Materials Science Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
    3. Present address: Department of Chemistry, Universität Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg (Germany)
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  • Dr. Debraj Ghosh,

    1. Department of Chemistry, University of California Berkeley, Berkeley, CA 94720 (USA)
    2. Materials Science Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
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  • Lam-Kiu Fong,

    1. Department of Chemistry, University of California Berkeley, Berkeley, CA 94720 (USA)
    2. Materials Science Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
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  • Dr. Huolin L. Xin,

    1. Materials Science Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
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  • Dr. Haimei Zheng,

    1. Materials Science Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
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  • Prof. A. Paul Alivisatos

    Corresponding author
    1. Department of Chemistry, University of California Berkeley, Berkeley, CA 94720 (USA)
    2. Materials Science Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720 (USA)
    • Department of Chemistry, University of California Berkeley, Berkeley, CA 94720 (USA)
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  • This work was supported by the Physical Chemistry of Inorganic Nanocrystals Program, Director, Office of Science, Office of Basic Energy Sciences, of the United States Department of Energy under contract DE-AC02-05CH11231. H.S. thanks the Studienstiftung des deutschen Volkes for support. D.G. was supported by the National Science Foundation American Competitiveness in Chemistry Postdoctoral Fellowship award number 0936997. H.Z. thanks the funding support of the U.S. DOE Office of Science Early Career Research Program. TEM experiments were performed at the National Center for Electron Microscopy (NCEM) of the Lawrence Berkeley National Laboratory (LBNL), which is supported by the U.S. Department of Energy (DOE) under Contract No. DE-AC02-05CH11231. We thank Brandon Beberwyck and Dr. Marcus Scheele for support with XRD measurements. Also, we thank Dr. Trevor Evers and Fadekemi Oba for helpful discussions.

Abstract

original image

Squaring the circle: Carbon monoxide was used to grow faceted cube-like platinum tips on semiconductor nanorods (see scheme). These novel hybrid structures reveal a new degree of synthetic control and might allow control over the catalytic activity of nanoscale photocatalysts by adding defined faceting.

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