Abstract

Bi2Te3 is a benchmark thermoelectric material suitable for near room temperature device applications. It wields unique properties at nanometer level from its bulk material. In this study, Bi2Te3 nanostructures with diverse morphology have been synthesized through a single pot, scalable hydrothermal method by using different surfactants. The structural and morphological properties of the nanostructures are found to be varied with addition of surfactant. Bi2Te3 nanostructures were characterized by using XRD, FESEM, EDAX, Raman studies, HRTEM and SAED methods. Bi2Te3 nanoplates were obtained with polyvinyl pyrrolidone (PVP) and Bi2Te3 Nanotubes with varying cross sections were found to be formed with disodium ethylene diamene terra acetic acid (EDTA) as surfactants. A growth mechanism is proposed for the obtained crystals, by analysing the experimental results.

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