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Influence of surface modification on thermoelectric properties of Bi 2Te 3 nanowires

Title
Influence of surface modification on thermoelectric properties of Bi 2Te 3 nanowires
Authors
Kim H.-Y.Han M.-K.Kim S.-J.
Ewha Authors
김성진
SCOPUS Author ID
김성진scopus
Issue Date
2011
Journal Title
2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011
Indexed
SCOPUS scopus
Abstract
Thermoelectric material bismuth telluride (Bi 2Te 3) nanowires were synthesized by pulsed-potential deposition using Bi(NO 3) 3·5H 2O and TeO 2 in 1.0 M HNO 3 in porous anodic alumina (PAA) template. Nanowires with various surface morphologies were obtained by changing the potential between -0.2 and -0.6 V vs. SCE (sat. KCl). The more negative pulse potentials than the reduction potential observed from cyclic voltammograms (CVs) were used for nanowires growth, delay potential was used in no current region between reduction and oxidation potentials of the compound. To obtain dense, highly oriented single-crystalline nanowires, the control of the growth rate is critical. Surface roughness and crystallinity of nanowires were affected by the pulsed-potential, and the pulsed-time. The microstructures and morphologies of nanowires were investigated by powder X-ray diffraction, FE-SEM, and HR-TEM. Thermoelectric properties of both smooth and rough surfaced nanowires are under investigation. © 2011 IEEE.
DOI
10.1109/NMDC.2011.6155409
ISBN
9781457721397
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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