期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 185, 期 -, 页码 345-353出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.05.007
关键词
Nanowire-like network; Screen-printing; Micro-injecting; Coplanar sensor; Gas sensing
资金
- National Basic Research Program of China [2009CB939702, 2009CB939705]
- Nature Science Foundation of China [50927201, 51204072]
Metal oxide quasi-one-dimensional (quasi-1D) nanostructures have a very good gas-sensing performance due to their large surface area and porous structures with a less agglomerated configuration. However, the well-designed fragile nanostructures could be easily destroyed during the conventional fabrication process of gas sensors. Herein, we presented a novel materials-sensor integration fabrication strategy: on basis of screen printing (SP) technology and calcination, micro-injecting (MI) was introduced into the fabrication process of sensors, which was named as SPMIC, to obtain In2O3 nanowire-like network directly on the surface of coplanar sensors array by structure replication from sacrificial carbon nanotubes (CNTs). The obtained In2O3 nanowire-like network exhibited an excellent response (electrical resistance ratio R-a/R-g), about 63.5, for 100 ppm formaldehyde at 300 degrees C, which was about 30 times larger than that of compact In2O3 nanoparticles film (non-network film). The enhanced gas-sensing properties were mainly attributed to the high surface-to-volume ratio and the nanoscopic structural properties of materials. Furthermore, the SPMIC could be employed not only in the preparation of other metal oxide nanowire-like network, but also in the fabrication of coplanar gas sensors arrays on the required sites with different materials. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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