Synthesis and Thermoelectrical Characterization of Lead Chalcogenide Nanowires

Authors

  • M. Fardy,

    1. Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)
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  • A. I. Hochbaum,

    1. Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)
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  • J. Goldberger,

    1. Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)
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  • M. M. Zhang,

    1. Materials Research Department, Toyota Technical Center, Toyota Motor Engineering & Manufacturing North America (TEMA) Inc., 2350 Green Road, Ann Arbor, MI 48105 (USA)
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  • P. Yang

    1. Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 (USA)
    2. Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (USA)
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  • M. F. and A. I. H. contributed equally to this work. We thank Renkun Chen for helpful discussion and assistance with thermal characterization. A. I. H. thanks the National Science Foundation for an IGERT graduate research fellowship. We thank the National Center for Electron Microscopy and the UC Berkeley Microfabrication Laboratory for the use of their facilities.

Abstract

original image

Single-crystalline arrays of PbS, PbSe, and PbTe nanowires (Figure: PbS) with diameters ranging from 40-200 nm and lengths up to 100 μm have been synthesized by a chemical vapor transport approach. Electrical and thermal characterization was performed to investigate their potential as thermoelectric materials. Compared to bulk, the nanowires exhibit reduced thermal conductivity below 100 K by up to 3 orders of magnitude, suggesting that they may be promising thermoelectric materials.

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