Synthesis and gas sensing properties of ZnO quantum dots

被引：120
作者：
Forleo, A. [1 ]
Francioso, L.
Capone, S.
Siciliano, P.
Lommens, P. [2 ]
Hens, Z. [2 ]
机构：
[1] CNR, IMM, CNR Area, I-73100 Lecce, Italy
[2] Univ Ghent, Phys Chem Lab, B-9000 Ghent, Belgium
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 146卷 / 01期
关键词：
Nanomaterials; ZnO; Wet chemical synthesis; Gas sensors; THIN-FILM; SENSORS; NANOPARTICLES; SENSITIVITY; SIZE; NO2; SEMICONDUCTORS; NANOCRYSTALS; NANORODS; GROWTH;
D O I：
10.1016/j.snb.2010.02.059
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
ZnO nanocrystals (2.5-4.5 nm) were prepared by a wet chemical method based on alkaline-activated hydrolysis and condensation of zinc acetate solutions. Dropcasting of the nanocrystals onto alumina substrates allowed the fabrication of gas sensing devices, that were tested towards NO(2), acetone and methanol and showed promising results. At low working temperature, the ZnO quantum dots based sensors are selective to nitrogen oxide, in fact a good sensitivity is shown at 200 degrees C at low concentration (2 ppm), while at temperature above 350 degrees C, high responses are obtained for acetone and methanol. The results obtained are stimulating for further developing of nano-ZnO based sensor devices. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：111 / 115
页数：5
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