Size dependence of gas sensitivity of ZnO nanorods

被引：424

作者：

Liao, L.

Lu, H. B.

Li, J. C. ^{[1
]}

He, H.

Wang, D. F.

Fu, D. J.

Liu, C.

Zhang, W. F.

机构：

[1] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Key Lab Acoust & Photon Mat & Devices, Minist Educ, Wuhan 430072, Peoples R China

[3] Univ Sci & Technol China, Dept Phys, Anhua 230026, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 05期

关键词：

D O I：

10.1021/jp065963k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the structure, optical, and gas-sensing properties of ZnO nanorods with different diameters. Vertically well-aligned homogeneous nanorods were grown along the c-axis orientation. The shift of Raman scattering E-2 (high) mode and photoluminescence (PL) spectra were used to study the dependences of nanorod diameters on the stress and oxygen vacancy. Gas sensors were prepared and tested for the detection Of C2H5OH and H2S (100 ppm) in air. It was found that the thin nanorods have a significantly better sensing performance than the thick nanorods. We provide a possible explanation from the aspect of the sensing mechanism of the surface reaction process.

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页码：1900 / 1903

页数：4

相关论文

共 32 条

[21] ZnO transparent thin films for gas sensor applications [J].

Suchea, M. ;

Christoulakis, S. ;

Moschovis, K. ;

Katsarakis, N. ;

Kiriakidis, G. .

THIN SOLID FILMS, 2006, 515 (02) :551-554

[22] Micro-Raman investigation of strain in GaN and AlxGa1-xN/GaN heterostructures grown on Si(111) [J].

Tripathy, S ;

Chua, SJ ;

Chen, P ;

Miao, ZL .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (07) :3503-3510

[23] Modified zinc oxide thick film resistors as NH3 gas sensor [J].

Wagh, MS ;

Jain, GH ;

Patil, DR ;

Patil, SA ;

Patil, LA .

SENSORS AND ACTUATORS B-CHEMICAL, 2006, 115 (01) :128-133

[24] Fabrication and ethanol sensing characteristics of ZnO nanowire gas sensors [J].

Wan, Q ;

Li, QH ;

Chen, YJ ;

Wang, TH ;

He, XL ;

Li, JP ;

Lin, CL .

APPLIED PHYSICS LETTERS, 2004, 84 (18) :3654-3656

[25] Detection of H2S down to ppb levels at room temperature using sensors based on ZnO nanorods [J].

Wang, CH ;

Chu, XF ;

Wu, MW .

SENSORS AND ACTUATORS B-CHEMICAL, 2006, 113 (01) :320-323

[26] Ammonia sensing characteristics of ZnO nanowires studied by quartz crystal microbalance [J].

Wang, XH ;

Zhang, J ;

Zhu, ZQ .

APPLIED SURFACE SCIENCE, 2006, 252 (06) :2404-2411

[27] A solution-phase, precursor route to polycrystalline SnO2 nanowires that can be used for gas sensing under ambient conditions [J].

Wang, YL ;

Jiang, XC ;

Xia, YN .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (52) :16176-16177

[28] Piezoelectric nanogenerators based on zinc oxide nanowire arrays [J].

Wang, ZL ;

Song, JH .

SCIENCE, 2006, 312 (5771) :242-246

[29] MODEL FOR THE OPERATION OF A THIN-FILM SNOX CONDUCTANCE-MODULATION CARBON-MONOXIDE SENSOR [J].

WINDISCHMANN, H ;

MARK, P .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1979, 126 (04) :627-633

[30] Grain size control and gas sensing properties of ZnO gas sensor [J].

Xu, JQ ;

Pan, QY ;

Shun, YA ;

Tian, ZZ .

SENSORS AND ACTUATORS B-CHEMICAL, 2000, 66 (1-3) :277-279

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