Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7148852 | Sensors and Actuators B: Chemical | 2013 | 9 Pages |
Abstract
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 Ra/Rg), about 63.5, for100 ppm formaldehyde at 300 °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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Sheng Yi, Shouqin Tian, Dawen Zeng, Keng Xu, Shunping Zhang, Changsheng Xie,