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One-dimensional oxide nanostructures as gas-sensing materials: Review and issues

Choi K, Jang H ...see all

Sensors, vol. 10, issue 4 (2010) pp. 4083-4099

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Abstract

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.

Author-supplied keywords

  • 1-dimensional nanostructures
  • Electronic-nose
  • Gas selectivity
  • Gas sensors
  • Long-term stability
  • Room-temperature operation

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