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

• Type: Article in International Scientific Journal
• Date: 2017

Authors

proenca, m. p. (Author) FCUP; Rosmaninho, M (Author) Other; Resende, PM (Author) Other; Sousa, CT (Author) FCUP; ventura, j. (Author) FCUP; araujo, j. p. (Author) FCUP; Fernandes, L (Author) Other; Tavares, PB (Author) Other; pereira, a. m. (Author) FCUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: MATERIALS & DESIGN

Vol. 118

Pages: 168-174

ISSN: 0264-1275

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 12 Citations

Other information

Authenticus ID: P-00M-CHE

DOI: 10.1016/j.matdes.2017.01.020

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7