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  • Title: Self-templated synthesis and thermal conductivity investigation for ultrathin perovskite oxide nanowires.
    Author: Yadav GG, Zhang G, Qiu B, Susoreny JA, Ruan X, Wu Y.
    Journal: Nanoscale; 2011 Oct 05; 3(10):4078-81. PubMed ID: 21858372.
    Abstract:
    The large thermal conductivity of bulk complex metal oxides such as SrTiO(3), NaCo(2)O(4), and Ca(3)Co(4)O(9) has set a barrier for the improvement of thermoelectric figure of merit and the applications of these materials in high temperature (≥1000 K) thermoelectric energy harvesting and solid-state cooling. Here, we present a self-templated synthesis approach to grow ultrathin SrTiO(3) nanowires with an average diameter of 6 nm in large quantity. The thermal conductivity of the bulk pellet made by compressing nanowire powder using spark plasma sintering shows a 64% reduction in thermal conductivity at 1000 K, which agrees well with theoretical modeling.
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