High density p-type Bi0.5Sb1.5Te3 nanowires by electrochemical templating through ion-track lithography
Li, Xiaohong; Koukharenko, E; Nandhakumar, IS; et al.Tudor, J; Beeby, SP; White, NM
Date: 25 February 2009
Article
Journal
Physical Chemistry Chemical Physics
Publisher
Royal Society of Chemistry
Publisher DOI
Abstract
High density p-type Bi0.5Sb1.5Te3nanowire arrays are produced by a combination of electrodeposition and ion-track lithography technology. Initially, the electrodeposition of p-type Bi0.5Sb1.5Te3 films is investigated to find out the optimal conditions for the deposition of nanowires. Polyimide-based Kapton foils are chosen as a polymer ...
High density p-type Bi0.5Sb1.5Te3nanowire arrays are produced by a combination of electrodeposition and ion-track lithography technology. Initially, the electrodeposition of p-type Bi0.5Sb1.5Te3 films is investigated to find out the optimal conditions for the deposition of nanowires. Polyimide-based Kapton foils are chosen as a polymer for ion track irradiation and nanotemplating Bi0.5Sb1.5Te3nanowires. The obtained nanowires have average diameters of 80 nm and lengths of 20 μm, which are equivalent to the pore size and thickness of Kapton foils. The nanowires exhibit a preferential orientation along the {110} plane with a composition of 11.26 at.% Bi, 26.23 at.% Sb, and 62.51 at.% Te. Temperature dependence studies of the electrical resistance show the semiconducting nature of the nanowires with a negative temperature coefficient of resistance and band gap energy of 0.089 ± 0.006 eV.
Engineering
Faculty of Environment, Science and Economy
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