Effect of mesoscale grains on thermoelectric characteristics of aligned ZnO/PVP composite nanofibers

Donghoon Lee; Kyoungah Cho; Jinyong Choi; Sangsig Kim

doi:10.1016/j.matlet.2014.12.029

Effect of mesoscale grains on thermoelectric characteristics of aligned ZnO/PVP composite nanofibers

Donghoon Lee, Kyoungah Cho, Jinyong Choi, Sangsig Kim

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

The thermoelectric characteristics of aligned ZnO/PVP composite nanofibers (NFs) prepared by electrospinning and subsequent thermal annealing were examined by the comparison between their mesoscale structure and the Seebeck coefficient. Rapid thermal annealing of NFs produces mesoscale grains and a Seebeck coefficient of -313.7 μV/K. In contrast, the NFs annealed in a conventional furnace have a straight-line shape without any discernible grains, and their Seebeck coefficient is largely four times smaller (-82.1 μV/K). The difference in the structural morphology of the NFs results in their difference in Seebeck coefficients. The mesoscale grains of the NFs annealed by rapid thermal annealing are efficient in reducing thermal conductivity and contribute to an enhancement of the thermoelectric properties.

Original language	English
Pages (from-to)	250-252
Number of pages	3
Journal	Materials Letters
Volume	142
DOIs	https://doi.org/10.1016/j.matlet.2014.12.029
Publication status	Published - 2015 Mar 1

Keywords

Composite materials
Energy storage and conversion
Nanofibers
Semiconductors
Thermoelectric

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2014.12.029

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title = "Effect of mesoscale grains on thermoelectric characteristics of aligned ZnO/PVP composite nanofibers",

abstract = "The thermoelectric characteristics of aligned ZnO/PVP composite nanofibers (NFs) prepared by electrospinning and subsequent thermal annealing were examined by the comparison between their mesoscale structure and the Seebeck coefficient. Rapid thermal annealing of NFs produces mesoscale grains and a Seebeck coefficient of -313.7 μV/K. In contrast, the NFs annealed in a conventional furnace have a straight-line shape without any discernible grains, and their Seebeck coefficient is largely four times smaller (-82.1 μV/K). The difference in the structural morphology of the NFs results in their difference in Seebeck coefficients. The mesoscale grains of the NFs annealed by rapid thermal annealing are efficient in reducing thermal conductivity and contribute to an enhancement of the thermoelectric properties.",

keywords = "Composite materials, Energy storage and conversion, Nanofibers, Semiconductors, Thermoelectric",

author = "Donghoon Lee and Kyoungah Cho and Jinyong Choi and Sangsig Kim",

note = "Funding Information: This research was supported by the Basic Science Research Program (NRF-2012R1A1A2042104) and the Mid-career Researcher Program (NRF-2013R1A2A1A03070750) through the National Research Foundation of Korea, as funded by the Ministry of Education, Science and Technology. Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

year = "2015",

month = mar,

day = "1",

doi = "10.1016/j.matlet.2014.12.029",

language = "English",

volume = "142",

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journal = "Materials Letters",

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T1 - Effect of mesoscale grains on thermoelectric characteristics of aligned ZnO/PVP composite nanofibers

AU - Lee, Donghoon

AU - Cho, Kyoungah

AU - Choi, Jinyong

AU - Kim, Sangsig

N1 - Funding Information: This research was supported by the Basic Science Research Program (NRF-2012R1A1A2042104) and the Mid-career Researcher Program (NRF-2013R1A2A1A03070750) through the National Research Foundation of Korea, as funded by the Ministry of Education, Science and Technology. Publisher Copyright: © 2014 Elsevier B.V. All rights reserved.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - The thermoelectric characteristics of aligned ZnO/PVP composite nanofibers (NFs) prepared by electrospinning and subsequent thermal annealing were examined by the comparison between their mesoscale structure and the Seebeck coefficient. Rapid thermal annealing of NFs produces mesoscale grains and a Seebeck coefficient of -313.7 μV/K. In contrast, the NFs annealed in a conventional furnace have a straight-line shape without any discernible grains, and their Seebeck coefficient is largely four times smaller (-82.1 μV/K). The difference in the structural morphology of the NFs results in their difference in Seebeck coefficients. The mesoscale grains of the NFs annealed by rapid thermal annealing are efficient in reducing thermal conductivity and contribute to an enhancement of the thermoelectric properties.

AB - The thermoelectric characteristics of aligned ZnO/PVP composite nanofibers (NFs) prepared by electrospinning and subsequent thermal annealing were examined by the comparison between their mesoscale structure and the Seebeck coefficient. Rapid thermal annealing of NFs produces mesoscale grains and a Seebeck coefficient of -313.7 μV/K. In contrast, the NFs annealed in a conventional furnace have a straight-line shape without any discernible grains, and their Seebeck coefficient is largely four times smaller (-82.1 μV/K). The difference in the structural morphology of the NFs results in their difference in Seebeck coefficients. The mesoscale grains of the NFs annealed by rapid thermal annealing are efficient in reducing thermal conductivity and contribute to an enhancement of the thermoelectric properties.

KW - Composite materials

KW - Energy storage and conversion

KW - Nanofibers

KW - Semiconductors

KW - Thermoelectric

UR - http://www.scopus.com/inward/record.url?scp=84919778686&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2014.12.029

DO - 10.1016/j.matlet.2014.12.029

M3 - Article

AN - SCOPUS:84919778686

SN - 0167-577X

VL - 142

SP - 250

EP - 252

JO - Materials Letters

JF - Materials Letters

ER -

Effect of mesoscale grains on thermoelectric characteristics of aligned ZnO/PVP composite nanofibers

Abstract

Keywords

ASJC Scopus subject areas

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