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학술지 Structure and Electrical Properties of Electrospun ZnO-NiO Mixed Oxide Nanofibers
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저자
문제현, 박진아, 이수재, 임상철, 정태형
발행일
200905
출처
Current Applied Physics, v.9 no.3, pp.S213-S216
ISSN
1567-1739
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.cap.2008.12.020
협약과제
08ZB1200, 정보통신 미래신기술연구사업(나노 기반 신개념 소자연구), 정태형
초록
ZnO-NiO mixed oxide nanofibers have been successfully produced from a solution containing poly 4-vinyl phenol and Zn and Ni acetic acids by an electrospinning method. The calcination process of the ZnO-NiO/PVP composite nanofibers brings forth polycrystalline two-phase ZnO-NiO nanofibers of 30-50 nm in diameters. ZnO and NiO crystallize into w체rtzite and rock salt structures, respectively. The electrical conductivity of ZnO-NiO nanofibers increases with an increase in temperature, which has been attributed to the thermal emission of carrier from the energy state of the grain boundaries. The activation was estimated to be 0.5 eV. The capacitance of ZnO-NiO nanofibers upon NOx gas exposure was observed to decrease. The feasibility of producing ZnO-NiO mixed oxide nanofibers opens a new door for capacitive gas sensors. © 2009 Elsevier B.V. All rights reserved.
KSP 제안 키워드
4-vinyl phenol(Poly), Acetic acid(AA), Calcination process, Composite nanofibers, Electrical conductivity(EC), Mixed oxides, Rock salt, Thermal Emission, Two-phase, electrical properties(I-V curve), electrospinning method