Vertically Aligned WO3–CuO Core–Shell Nanorod Arrays for Ultrasensitive NH3 Detection

다국어 초록 (Multilingual Abstract)

Vertically aligned WO3–CuO core–shell nanorod arrays for NH3 sensing are prepared. The sensor is fabricated by preparing WO3–CuO nanorod arrays directly on silicon wafer with interdigital Pt electrodes. The WO3–CuO nanorod arrays are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The sensor based on the vertically aligned WO3–CuO nanorod arrays exhibits ultrasensitive NH3 detection, indicating p-type behavior. The optimum sensing temperature is found to be about 150 ℃. Both response and recovery time to NH3 ranging from 50 ppm to 500 ppm are around 10–15 s. A possible NH3 sensing mechanism of the vertically aligned hybrid nanorod arrays is proposed.

참고문헌 (Reference)

1 D. R. Miller, 204 : 250-, 2014

2 H. -S. Woo, 23 : 245501-, 2012

3 T. M. Li, 221 : 1570-, 2015

4 G. M. Zeng, 3 : 1504-, 2016

5 Y. Zhu, 139 : 5014-, 2014

6 Y. Qin, 223 : 487-, 2016

7 J. W. Li, 7 : 10108-, 2015

8 F. E. Annanouch, 7 : 6842-, 2015

9 Y. L. Wang, 238 : 473-, 2017

10 K. Wetchakun, 160 : 580-, 2011

11 Y. -B. Zhang, 202 : 500-, 2014

12 J. H. Kim, 212 : 190-, 2015

13 S. Vallejos, 47 : 565-, 2011

14 S. Srivastava, 23 : 205501-, 2012

15 S. L. Bai, 150 : 749-, 2010

16 N. S. Ramgir, 188 : 525-, 2013

17 S. Park, 40 : 11051-, 2014

18 W. W. Yu, 33 : 15-, 2016

19 J. C. Zhou, 403 : 274-, 2017

20 Y. Liu, 7 : 3532-, 2015

21 Y. H. Lee, 81 : 745-, 2002

22 Y. H. Lee, 85 : 5977-, 2004

23 H. W. Long, 209 : 342-, 2017

24 Wenjun Yan, "Effect of Au on the Performance of Porous Silicon/V2O5 Nanorods Heterojunctions to NO2 Gas" 성균나노과학기술원 11 (11): 77-84, 2016

25 Taisheng Yang, "Chemical Stability of 2D-Nanostructured WO3 in Hydrogen Sensing under Varied Operation Temperature" 성균나노과학기술원 11 (11): 84-91, 2016