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학술지 Structural, Electrical and Gas Sensing Properties of Eletrospun TiO2 Nanofibers
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저자
박진아, 문제현, 이수재, 김성현, 정태형, 추혜용
발행일
200912
출처
Thin Solid Films, v.518 no.22, pp.6642-6645
ISSN
0040-6090
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.tsf.2010.02.074
협약과제
09ZH1300, ETRI 연구역량 강화를 위한 R&D체계 구축 및 Seed형 기술개발을 위한 창의형 연구 사업, 현창희
초록
Multi-layered random network structure of titanium dioxides (TiO 2) nanofibers was fabricated by calcining electrospun TiO 2/PVP hybrid fibers. Their structural, electrical and gas sensing properties were investigated in a calcination temperature range of 400-800 °C. TiO2 nanofibers are polycrystalline with anatase structure below 600 °C and a mixture of anatase and rutile structures at 800 °C. The diameter of TiO2 nanofibers ranged from 350 nm to 500 nm, and the grain size increased from 8 nm to 45 nm with the increase in calcining temperature. The activation energies were in the range of 0.50-0.57 eV. The TiO2 nanofibers calcined at 600 °C showed the gas response upon exposure to CO concentration even below 1 ppm. © 2010 Elsevier B.V. All rights reserved.
키워드
Calcining, CO, Electrospinning, Gas sensor, Nanofiber, TiO 2
KSP 제안 키워드
5 nm, Activation Energy, Anatase and rutile, Anatase structure, CO concentration, Calcination temperature, Calcining temperature, Electrospun TiO 2, Gas response, Gas sensing properties, Grain size