Abstract
Nanostructured materials are of great interest for improving the figure of merit of thermoelectric materials. Single crystalline Bi 2Te 3 nanowires were prepared by aqueous chemical synthesis at 65 °C using Te as the reactant and sodium-dodecyl-benzene-sulfonate (SDBS) as the surfactant. The products obtained by parallel experiments without the addition of SDBS or using Na 2TeO 3 as the Te-precursor are very fine nanoparticles without nanowires. It is suggested that the directional effect of SDBS and the dissolving of the amorphous tellurium colloids would be two necessary conditions for the growth of Bi 2Te 3 nanowires in an aqueous chemical route.
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