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In this paper, ZnO nanowire (ZnO NW) array is prepared based on microfluidic technology. The crystalline structures and morphologies of as-synthesized ZnO NWs are characterized by X-ray diffraction and scanning electron microscopy. The results show that ZnO NW is high-quality crystalline and c-axis oriented. At the same time, the gas-sensing properties of ZnO NWs are investigated for different gases, such as acetone, methanol and ethanol. The measured results prove that ZnO NW shows a sensitivity of 8.26 at 475 ℃, and the response and recovery times can reach 9 and 5 s separately, when exposed to 200 ppm (1 ppm=10-6) acetone. Compared with the method of conventional hydrothermal technology, the ZnO NWs based on microfluidic technology shows high sensitivity and fast recovery time. Finally, the gas sensing mechanism of ZnO NWs is also discussed from the aspect of gain and lose electron of oxygen molecules on material surface.
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Keywords:
- zinc oxide nanowires /
- microfluidic technology /
- hydrothermal method /
- gas-sensing properties
[1] Zhang W, Li M K, Wei Q, Cao L, Yang Z, Qiao S S 2008 Acta Phys. Sin. 57 5887 (in Chinese) [张威, 李梦轲, 魏强, 曹璐, 杨志, 乔双双 2008 57 5887]
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[3] Wang J, Sun X, Huang H, Lee Y, Tan O, Yu M, Lo G, Kwong D 2007 Appl. Phys. A 88 611
[4] Musarrat J, Muhammad A I, R V Kumar, Mansoor A, Muhammad T J 2014 Chin. Phys. B 23 018504
[5] Lim J H, Kang C K, Kim K K, Park I K, Hwang D K, Park S J 2006 Adv. Mater. 18 2720
[6] Jiang W, Gao H, Xu L L, Ma J N, Zhang E, Wei P, Lin J Q 2011 Chin. Phys. B 20 037307
[7] Yu X, Hu Z Y, Huang Z H, Yu X M, Zhang J J, Zhao G S, Zhao Y 2013 Chin. Phys. B 22 118801
[8] Jia Z N, Zhang X D, Liu Y, Wang Y F, Fan J, Liu C C, Zhao Y 2014 Chin. Phys. B 23 046106
[9] Park W I, Kim D, Jung S W, Yi G C 2002 Appl. Phys. Lett. 80 4232
[10] Qiu J, Guo M, Feng Y, Wang X 2011 Electrochim. Acta 56 5776
[11] Greene L E, Law M, Tan D H, Montano M, Goldberger J, Somorjai G, Yang P 2005 Nano Lett. 5 1231
[12] Chen X M, Gao X Y, Zhang S, Liu H T 2013 Acta Phys. Sin. 62 49102 (in Chinese) [陈先梅, 郜小勇, 张飒, 刘红涛 2013 62 49102]
[13] Law M, Greene L E, Johnson J C, Saykally R, Yang P 2005 Nat. Mater. 4 455
[14] Zhu S, Chen X, Zuo F, Jiang M, Zhou Z, Hui D 2013 J. Solid State Chem. 197 69
[15] Ladanov M, Algarin A P, Matthews G, Ram M, Thomas S, Kumar A, Wang J 2013 Nanotechnology 24 375301
[16] Kim J, Li Z, Park I 2011 Lab on a Chip 11 1946
[17] Hsueh T J, Chang S J, Lin Y R, Tsai S Y, Chen I C, Hsu C L 2006 Cryst. Growth Des. 6 1282
[18] Xu C, Gao D 2012 J. Phys. Chem. C 116 7236
[19] Deng X, Sang S, Li P, Li G, Gao F, Sun Y, Zhang W, Hu J 2013 J. Nanomater. 2013 297676
[20] Hu M, Liu Q L, Jia D L, Li M D 2013 Acta Phys. Sin. 62 57102 (in Chinese) [胡明, 刘青林, 贾丁立, 李明达 2013 62 57102]
[21] Al-Kuhaili M, Durrani S, Bakhtiari I 2008 Appl. Surf. Sci. 255 3033
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[1] Zhang W, Li M K, Wei Q, Cao L, Yang Z, Qiao S S 2008 Acta Phys. Sin. 57 5887 (in Chinese) [张威, 李梦轲, 魏强, 曹璐, 杨志, 乔双双 2008 57 5887]
[2] Cha S, Jang J, Choi Y, Amaratunga G, Ho G, Welland M, Hasko D, Kang D J, Kim J 2006 Appl. Phys. Lett. 89 263102
[3] Wang J, Sun X, Huang H, Lee Y, Tan O, Yu M, Lo G, Kwong D 2007 Appl. Phys. A 88 611
[4] Musarrat J, Muhammad A I, R V Kumar, Mansoor A, Muhammad T J 2014 Chin. Phys. B 23 018504
[5] Lim J H, Kang C K, Kim K K, Park I K, Hwang D K, Park S J 2006 Adv. Mater. 18 2720
[6] Jiang W, Gao H, Xu L L, Ma J N, Zhang E, Wei P, Lin J Q 2011 Chin. Phys. B 20 037307
[7] Yu X, Hu Z Y, Huang Z H, Yu X M, Zhang J J, Zhao G S, Zhao Y 2013 Chin. Phys. B 22 118801
[8] Jia Z N, Zhang X D, Liu Y, Wang Y F, Fan J, Liu C C, Zhao Y 2014 Chin. Phys. B 23 046106
[9] Park W I, Kim D, Jung S W, Yi G C 2002 Appl. Phys. Lett. 80 4232
[10] Qiu J, Guo M, Feng Y, Wang X 2011 Electrochim. Acta 56 5776
[11] Greene L E, Law M, Tan D H, Montano M, Goldberger J, Somorjai G, Yang P 2005 Nano Lett. 5 1231
[12] Chen X M, Gao X Y, Zhang S, Liu H T 2013 Acta Phys. Sin. 62 49102 (in Chinese) [陈先梅, 郜小勇, 张飒, 刘红涛 2013 62 49102]
[13] Law M, Greene L E, Johnson J C, Saykally R, Yang P 2005 Nat. Mater. 4 455
[14] Zhu S, Chen X, Zuo F, Jiang M, Zhou Z, Hui D 2013 J. Solid State Chem. 197 69
[15] Ladanov M, Algarin A P, Matthews G, Ram M, Thomas S, Kumar A, Wang J 2013 Nanotechnology 24 375301
[16] Kim J, Li Z, Park I 2011 Lab on a Chip 11 1946
[17] Hsueh T J, Chang S J, Lin Y R, Tsai S Y, Chen I C, Hsu C L 2006 Cryst. Growth Des. 6 1282
[18] Xu C, Gao D 2012 J. Phys. Chem. C 116 7236
[19] Deng X, Sang S, Li P, Li G, Gao F, Sun Y, Zhang W, Hu J 2013 J. Nanomater. 2013 297676
[20] Hu M, Liu Q L, Jia D L, Li M D 2013 Acta Phys. Sin. 62 57102 (in Chinese) [胡明, 刘青林, 贾丁立, 李明达 2013 62 57102]
[21] Al-Kuhaili M, Durrani S, Bakhtiari I 2008 Appl. Surf. Sci. 255 3033
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