Enhanced ethanol sensing properties of TiO 2 nanotube sensors

Youngjae Kwon, Hyunsu Kim, Sangmin Lee, In Joo Chin, Tae Yeon Seong, Wan In Lee, Chongmu Lee

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

TiO 2 nanotube arrays were prepared for use as gas sensors by anodizing Ti thin foils. Transmission electron microscopy revealed a tube diameter and length ranging from 70 to 120 nm and 300 to 400 nm, respectively. The TiO 2 nanotube array sensors showed responses of 68,000 and 1,380,000% to 300 and 1000 ppm C 2H 5OH at 250 °C, respectively. These values are far superior to the responses obtained by most oxide one-dimensional nanostructures reported in the literature. In addition, the ethanol sensing mechanism of the TiO 2 nanotube array sensors is discussed.

Original languageEnglish
Pages (from-to)441-446
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume173
DOIs
Publication statusPublished - 2012 Oct

Keywords

  • Ethanol
  • Gas sensors
  • Response
  • TiO nanotubes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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