Synthesis and Transport properties of Dimensional Nanocomposite Chalcogenides

ORAL

Abstract

Bulk polycrystalline chalcogenides were prepared from chalcogenide nanocrystals synthesized in high yields by a variety of chemical processes. Doping of the nanocrystals allowed for the modification of the carrier concentration in the bulk composites. Densification employing spark plasma sintering dimensionally integrated nanoscale grains within a bulk matrix, resulting in a uniform dispersion of nonconglomerated nanocrystals. Transport properties of the resulting dimensional nanocomposites were evaluated through temperature dependent resistivity, Hall, Seebeck coefficient, and thermal conductivity measurements. These properties were investigated as a function of nanocrystal size and composition. The results are discussed in terms of the potential for thermoelectric applications.

*This work is supported by the U.S. Army Medical Research and Materiel Command under Grant No. W81XWH-07-1-0708 and the National Science Foundation under Grant No. CBET-0932526

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Authors

  • A. Datta

    • Department of Physics, University of South Florida

  • J. Paul

    • Department of Physics, University of South Florida

  • Adrian Popescu

    • University of South Florida
    • Department of Physics, University of South Florida

  • Lilia Woods

    • University of South Florida
    • Department of Physics, University of South Florida

  • G.S. Nolas

    • Department of Physics, University of South Florida
    • University of South Florida