TY - GEN
T1 - Influence of surface modification on thermoelectric properties of Bi 2Te 3 nanowires
AU - Kim, Ha Yeong
AU - Han, Mi Kyung
AU - Kim, Sung Jin
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84860428199&partnerID=8YFLogxK
U2 - 10.1109/NMDC.2011.6155409
DO - 10.1109/NMDC.2011.6155409
M3 - Conference contribution
AN - SCOPUS:84860428199
SN - 9781457721397
T3 - 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011
SP - 466
EP - 468
BT - 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011
T2 - 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011
Y2 - 18 October 2011 through 21 October 2011
ER -