| 학회 |
한국재료학회 |
| 학술대회 |
2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 |
17권 2호 |
| 발표분야 |
A. Information and Sensor Materials(정보소재 및 센서) |
| 제목 |
NO2 gas sensing properties of amorphous InGaZnO4 submicron-tubes prepared by polymeric fiber templating route |
| 초록 |
One-dimensional (1D) amorphous InGaZnO4 (a-IGZO) submicron-tubes were synthesized in a method involving an electrospun polymeric fiber template and the direct RF-sputter-coating of a-IGZO films combined with subsequent calcination at 450 ◦C. The a-IGZO hollow fibers with a diameter of 300 nm and a shell thickness of 20–30 nm showed an amorphous structure, as confirmed by XRD and HR-TEM analyses. Gas sensors using semiconducting a-IGZO tube networks exhibited n-type gas sensing characteristics and a 3.7-fold higher gas response (Rgas/Rair = 109.5 at 2 ppm NO2) compared to (Rgas/Rair = 29.4) planar a-IGZO thin films at an operating temperature of 300 ◦C. The enhanced gas response of a-IGZO tubes is attributed to the greater space charge modulation depth associated with the thin shell structures and the porous networks which are readily accessible by gas. |
| 저자 |
최진훈1, 조남규2, 임대순3, 김일두2
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| 소속 |
1한국과학기술(연), 2한국과학기술원, 3고려대 |
| 키워드 |
InGaZnO4; Gas sensor; Electrospinning; Hollow nanofiber; Tubes
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| E-Mail |
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