One-Dimensional Oxide Nanostructures as Gas-Sensing Materials: Review and Issues
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- One-Dimensional Oxide Nanostructures as Gas-Sensing Materials: Review and Issues
- Choi, Kyoung Jin; Jang, Ho Won
- 1-dimensional nanostructures; Electronic-nose; Gas selectivity; Gas sensors; Long-term stability; Room-temperature operation
- Issue Date
- MDPI AG
- SENSORS, v.10, no.4, pp.4083 - 4099
- In this article, we review gas sensor application of one-dimensional (1D) metal-oxide nanostructures with major emphases on the types of device structure and issues for realizing practical sensors. One of the most important steps in fabricating 1D-nanostructure devices is manipulation and making electrical contacts of the nanostructures. Gas sensors based on individual 1D nanostructure, which were usually fabricated using electron-beam lithography, have been a platform technology for fundamental research. Recently, gas sensors with practical applicability were proposed, which were fabricated with an array of 1D nanostructures using scalable micro-fabrication tools. In the second part of the paper, some critical issues are pointed out including long-term stability, gas selectivity, and room-temperature operation of 1D-nanostructure-based metal-oxide gas sensors.
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