Journal
NANOSCALE
Volume 3, Issue 10, Pages 4078-4081Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1nr10624d
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Funding
- Purdue University
- Birck Nanotechnology Center
- DuPont
- Midwest Institute for Nanoelectronics Discovery (MIND)
- NSF/DOE [1048616]
- Air Force Office of Scientific Research [FA9550-11-1-0057]
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The large thermal conductivity of bulk complex metal oxides such as SrTiO3, NaCo2O4, and Ca3Co4O9 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 SrTiO3 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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