File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

신흥주

Shin, Heungjoo
Micro/Nano Integrated Systems Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Local crystallization and enhanced thermoelectric performance of glassy carbon induced by the electron beam irradiation

Author(s)
Oh, InseonJo, JunhyeonPark, JungminLee, JongminShin, HeungjooYoo, Jung-Woo
Issued Date
2016-11
DOI
10.1016/j.cap.2016.08.017
URI
https://scholarworks.unist.ac.kr/handle/201301/20453
Fulltext
http://www.sciencedirect.com/science/article/pii/S1567173916302279
Citation
CURRENT APPLIED PHYSICS, v.16, no.11, pp.1511 - 1516
Abstract
Glassy carbon can be used in a variety of harsh environments because it exhibits low electrical resistance, high thermal stability, chemically impermeability and hardness. In this work, we studied the potential application of the pyrolized glassy carbon as a thermoelectric material by electron beam irradiation. Irradiation with electron beam energy of 1.4 MeV and 0.2 MeV triggered local crystallization of glassy carbon, which was determined by a Raman spectroscopy. As the irradiation time was increased, the number of sp2 hybridized carbons was gradually increased while the number of disordered carbons was decreased. This electron beam induced local crystallization caused a synergetic effect on a thermoelectric power factor of the studied glassy carbon films. Although the electrical conductivity was decreased by the e-beam irradiation, the Seebeck coefficient was significantly enhanced resulting in an improved power factor. The optimal power factor we obtained for the irradiated glassy carbon was ∼50% higher than that of the non-irradiated sample.
Publisher
ELSEVIER SCIENCE BV
ISSN
1567-1739
Keyword (Author)
Glassy carbonRaman spectroscopySeebeck coefficientThermoelectricityElectron-beam irradiation
Keyword
RAMAN-SCATTERINGVITREOUS CARBONFILMSMERITSEMICONDUCTORSTEMPERATURECOMPOSITESTELLURIDEGRAPHITESPECTRA

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.