Back to Search Start Over

Tailoring Bi-Te based nanomaterials by electrodeposition: Morphology and crystalline structure

Authors :
João P. Araújo
Alberto M. Pereira
João Ventura
M. Rosmaninho
M P Proenca
Célia T. Sousa
Pedro B. Tavares
Pedro M. Resende
Lisete Fernandes
Source :
Materials & Design, Vol 118, Iss, Pp 168-174 (2017)
Publication Year :
2017
Publisher :
Elsevier BV, 2017.

Abstract

Bi2Te3 is the most commonly used thermoelectric material in modern solid-state refrigerators and power generators based on this basic principle. Due to predictions of significant improvements in their efficiency by using nanostructured materials, a thorough study on thin films and nanowires deposited by the electrodeposition method are here presented. The study of the deposition applied potential effect on the morphology, stoichiometry and crystallinity of both thin films and nanowires has been conducted. The morphology and stoichiometry was found to highly depend on the deposition potential, where by increasing it one was able to accurately control the Te% content of the deposits. X-ray diffraction measurements have shown the presence of a strong relation between the material's crystallinity and the deposition potential, where samples ranged from monocrystalline, at very low potentials, to almost completely amorphous, at high potentials. Finally, nanowire diameters were seen to diminish with the applied potential, in conjunction with the general array. Keywords: Electrodeposition, Thin films, Nanowires, Energy harvesting, Morphology

Details

ISSN :
02641275
Volume :
118
Database :
OpenAIRE
Journal :
Materials & Design
Accession number :
edsair.doi.dedup.....20054ca2bbafa326f737ba80ba6bdb0c
Full Text :
https://doi.org/10.1016/j.matdes.2017.01.020