Vertically ordered hematite nanotube array as an ultrasensitive and rapid response acetone sensor

Do Hong Kim, Young Seok Shim, Jong Myeong Jeon, Hu Young Jeong, Sung Soo Park, Young Woon Kim, Jin Sang Kim, Jong Heun Lee, Ho Won Jang

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Vertically ordered nanotube array is a desirable configuration to improve gas sensing properties of the hematite which is the most abundant and cheapest metal oxide semiconductor on earth but has low and sluggish chemiresistive responses. We have synthesized a vertically aligned, highly ordered hematite nanotube array directly on a patterned SiO2/Si substrate and then it used as a gas sensor without additional processing. The nanotube array sensor shows unprecedentedly ultrahigh and selective responses to acetone with detection limits down to a few parts per billion and response time shorter than 3 s.

Original languageEnglish
Pages (from-to)14779-14784
Number of pages6
JournalACS Applied Materials and Interfaces
Volume6
Issue number17
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • acetone sensor
  • earth abundant
  • hematite
  • nanotube array
  • ultrasensitive

ASJC Scopus subject areas

  • Materials Science(all)

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    Kim, D. H., Shim, Y. S., Jeon, J. M., Jeong, H. Y., Park, S. S., Kim, Y. W., Kim, J. S., Lee, J. H., & Jang, H. W. (2014). Vertically ordered hematite nanotube array as an ultrasensitive and rapid response acetone sensor. ACS Applied Materials and Interfaces, 6(17), 14779-14784. https://doi.org/10.1021/am504156w