| 학회 |
한국재료학회 |
| 학술대회 |
2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 |
17권 2호 |
| 발표분야 |
A. Information and Sensor Materials(정보소재 및 센서) |
| 제목 |
HIGHLY POROUS TUNGSTEN OXIDE NANOWIRES AS RESISTIVE SENSOR FOR REDUCING GASES |
| 초록 |
Gas sensor properties of WO3 nanowire structures have been studied. The sensing layer was prepared by deposition of tungsten metal on porous single wall carbon nanotubes followed by thermal oxidation. The morphology and crystalline quality of WO3 material was investigated by SEM, TEM, XRD and Raman analysis. A highly porous WO3 nanowire structure with a mean diameter of 82 nm was obtained. Response to CO, NH3 and H2 gases diluted in air were investigated in the temperature range of 100 – 340oC The sensor exhibited low response to CO gas and quite high response to NH3 and H2 gases. The highest sensitivity was observed at 250oC for NH3 and 300oC for H2. The effect of the diameters of WO3 nanowires on the sensor performance was also studied. The WO3 nanowires sensor with diameter of 40 nm showed quite high sensitivity, fast response and recovery times to H2 diluted in dry air. The sensitivity as a function of detecting gas concentrations and gas sensing mechanism was discussed. The effect of dilution carrier gases, dry air and nitrogen, was examined. |
| 저자 |
Nguyen Minh Vuong, Hoang Nhat Hieu, Dongmi Jang, Hyuck Jung, Dojin Kim
|
| 소속 |
Chungnam National Univ. |
| 키워드 |
Tungsten oxide; Nanowires; Single wall carbon nanotube; Gas sensor; Porosity
|
| E-Mail |
|
