TY - GEN
T1 - Characterization of thermoelectric oxide nanofibers using MEMS device
AU - Xu, Weihe
AU - Zhang, Guitao
AU - Hadim, Hamid
AU - Shi, Yong
PY - 2013
Y1 - 2013
N2 - Thermoelectric oxide nanofibers prepared by electrospinning was expected to have a significantly reduced thermal conductivity compared with their bulk forms. However, the measurement of the thermal conductivity of such a single nanofiber was very difficult because of sample preparation, sample loading and the lack of characterization tools. In this work, a technology that can be used to measure the thermal conductivity of a single nanofiber prepared by electrospinning was developed. A special Si template was designed to collect and transfer the thermoelectric nanofibers prepared by electrospinning. A microelectro-mechanical (MEMS) device was designed and fabricated to measure the thermal conductivity of a single nanofiber. The structure of the MEMS device was specially designed therefore a single nanofiber collected by the special Si template can be transferred onto the MEMS device. A La0.95Sr 0.05CoO3 nanofiber with the diameter of 290 nm was prepared and characterized by this technology. The measured thermal conductivity of the nanofiber was 2.07 W/m•K, which is 30% lower than that of the bulk form La0.95Sr0.05CoO3 previously reported.
AB - Thermoelectric oxide nanofibers prepared by electrospinning was expected to have a significantly reduced thermal conductivity compared with their bulk forms. However, the measurement of the thermal conductivity of such a single nanofiber was very difficult because of sample preparation, sample loading and the lack of characterization tools. In this work, a technology that can be used to measure the thermal conductivity of a single nanofiber prepared by electrospinning was developed. A special Si template was designed to collect and transfer the thermoelectric nanofibers prepared by electrospinning. A microelectro-mechanical (MEMS) device was designed and fabricated to measure the thermal conductivity of a single nanofiber. The structure of the MEMS device was specially designed therefore a single nanofiber collected by the special Si template can be transferred onto the MEMS device. A La0.95Sr 0.05CoO3 nanofiber with the diameter of 290 nm was prepared and characterized by this technology. The measured thermal conductivity of the nanofiber was 2.07 W/m•K, which is 30% lower than that of the bulk form La0.95Sr0.05CoO3 previously reported.
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U2 - 10.1115/DETC2013-13421
DO - 10.1115/DETC2013-13421
M3 - Conference contribution
AN - SCOPUS:84896945069
SN - 9780791855843
T3 - Proceedings of the ASME Design Engineering Technical Conference
BT - 15th International Conference on Advanced Vehicle Technologies; 10th International Conference on Design Education; 7th International Conference on Micro- and Nanosystems
T2 - ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2013
Y2 - 4 August 2013 through 7 August 2013
ER -