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One-Dimensional Oxide Nanostructures as Gas-Sensing Materials: Review and Issues

2010; Multidisciplinary Digital Publishing Institute; Volume: 10; Issue: 4 Linguagem: Inglês

10.3390/s100404083

1424-8220

Kyoung Jin Choi, Ho Won Jang,

ZnO doping and properties

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.