Selective response inversion to NO2 and acetic acid in ZnO and CdS nanocomposite gas sensor

被引：20
作者：
Calestani, D. [1 ]
Villani, M. [1 ]
Mosca, R. [1 ]
Lazzarini, L. [1 ]
Coppede, N. [1 ]
Dhanabalan, S. C. [1 ]
Zappettini, A. [1 ]
机构：
[1] IMEM CNR, I-43124 Parma, Italy
来源：
NANOTECHNOLOGY | 2014年 / 25卷 / 36期
关键词：
ZnO; nanostructures; gas sensor; p-n conductivity; NO2; acetic acid; response inversion; SENSING PROPERTIES; ROOM-TEMPERATURE; TIN OXIDE; HYDROGEN SENSITIVITY; CHEMICAL SENSORS; METAL-OXIDES; THIN-FILMS; N-TYPE; CO; HETEROSTRUCTURE;
D O I：
10.1088/0957-4484/25/36/365502
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
High sensitivity zinc oxide (ZnO) tetrapods (TPs) have been functionalized by nucleating cadmium sulphide (CdS) nanoparticles (NPs) directly on their surface with a spotted coverage thanks to an optimized synthesis in dimethylformamide (DMF). The obtained hybrid coupled material has been used to realize a gas sensing device with a highly porous nanostructured network, in which the proper alternation of ZnO-TPs and CdS-NPs gives rise to unconventional chemoresistive behaviours. Among the different tested gases and vapours, the sensor showed a unique fingerprint response-inversion between 300 degrees C and 400 degrees C only for nitrogen dioxide (NO2) and acetic acid (CH3COOH).
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页数：6
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