Large-Scale Synthesis and Characterization of the Size-Dependent Thermoelectric Properties of Uniformly Sized Bismuth Nanocrystals

Authors

  • Jae Sung Son,

    1. National Creative Research Initiative Center for Oxide Nanocrystalline Materials, World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744 (Korea), Fax: (+82) 2-886-8457
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  • Kunsu Park,

    1. National Creative Research Initiative Center for Oxide Nanocrystalline Materials, World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744 (Korea), Fax: (+82) 2-886-8457
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  • Dr. Mi-Kyung Han,

    1. Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750 (Korea)
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  • Chanyoung Kang,

    1. School of Mechanical Engineering, Yonsei University, Seoul 120-749 (Korea)
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  • Sung-Geun Park,

    1. School of Mechanical Engineering, Yonsei University, Seoul 120-749 (Korea)
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  • Jae-Hee Kim,

    1. School of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea)
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  • Prof. Woochul Kim,

    1. School of Mechanical Engineering, Yonsei University, Seoul 120-749 (Korea)
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  • Prof. Sung-Jin Kim,

    1. Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750 (Korea)
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  • Prof. Taeghwan Hyeon

    Corresponding author
    1. National Creative Research Initiative Center for Oxide Nanocrystalline Materials, World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744 (Korea), Fax: (+82) 2-886-8457
    • National Creative Research Initiative Center for Oxide Nanocrystalline Materials, World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744 (Korea), Fax: (+82) 2-886-8457
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  • T.H. acknowledges financial support by the Korean Ministry of Education, Science and Technology through the National Creative Research Initiative (R16-2002-003-01001-0), Strategic Research (2010-0029138), and World Class University (R31-10013) programs of National Research Foundation (NRF) of Korea. M.-K.H. acknowledges financial support from the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, Korea.

Abstract

original image

Pressed Bi nanocrystals synthesized by a simple colloidal method exhibited very high electrical conductivity of 104–105 S m−1 and extremely low thermal conductivity of 0.35 W m−1 K−1. The synthetic method can be used for the inexpensive preparation of highly efficient thermoelectric materials by engineering the size of nanocrystals (see picture; scale bar 50 nm; ZT=figure of merit).

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