title: Self-templated synthesis and thermal conductivity investigation for ultrathin perovskite oxide nanowires.
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.
authors.affiliation: School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA.
authors.forename: Gautam G
authors.initials: GG
authors.lastname: Yadav
authors.forename: Genqiang
authors.initials: G
authors.lastname: Zhang
authors.forename: Bo
authors.initials: B
authors.lastname: Qiu
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Susoreny
authors.forename: Xiulin
authors.initials: X
authors.lastname: Ruan
authors.forename: Yue
authors.initials: Y
authors.lastname: Wu
mesh_terms: D017610:Calcium Compounds / Q000737:chemistry*; D008962:Models, Theoretical; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry*; D013814:Thermal Conductivity; D014025:Titanium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D010087:Oxides; C059910:perovskite; D014025:Titanium