title: Anisotropy of chemical transformation from In2Se3 to CuInSe2 nanowires through solid state reaction.
abstract: In(2)Se(3) nanowires synthesized by the VLS technique are transformed by solid-state reaction with copper into high-quality single-crystalline CuInSe(2) nanowires. The process is studied by in situ transmission electron microscopy. The transformation temperature exhibits a surprising anisotropy, with In(2)Se(3) nanowires grown along their [0001] direction transforming at a surprisingly low temperature of 225 degrees C, while nanowires in a [11(2)0] orientation require a much higher temperature of 585 degrees C. These results offer a route to the synthesis of CuInSe(2) nanowires at a relatively low temperature as well as insight into the details of a transformation commonly used in the fabrication of thin-film solar cells.
authors.affiliation: Department of Materials Science and Engineering, Stanford University, Stanford, California 94305-4034, USA.
authors.forename: David T
authors.initials: DT
authors.lastname: Schoen
authors.forename: Hailin
authors.initials: H
authors.lastname: Peng
authors.forename: Yi
authors.initials: Y
authors.lastname: Cui
mesh_terms: D016880:Anisotropy; D003300:Copper / Q000737:chemistry*; D007204:Indium / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry*; D012643:Selenium / Q000737:chemistry*
chemical_list: C101793:copper indium diselenide; C542684:indium triselenide; D007204:Indium; D003300:Copper; D012643:Selenium