CO gas sensing properties of direct-patternable TiO2 thin films containing multi-wall carbon nanotubes

Hyuncheol Kim, Min Hee Hong, Ho Won Jang, Seok Jin Yoon, Hyung-Ho Park

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The sensing properties of direct-patternable TiO2 thin films prepared by photochemical solution deposition were improved by the incorporation of multi-wall carbon nanotubes (MWCNTs). Upon incorporation of the MWCNTs, the crystallinity of the TiO2 thin films containing MWCNTs did not change. However, the electron conductivity was improved due to the π-bond nature of the MWCNT surface. In addition, an increase in the oxidation ratio on the surface of the TiO2 thin films upon MWCNT incorporation caused an increase in surface area. Because of the high electron conductivity and surface area of the MWCNT-incorporated TiO2 sensor, the sensitivity of the sensor was enhanced from 2.19 to 89.2. Direct-patterning of MWCNT-incorporated TiO2 thin films can be performed without a photoresist or etching process. These results suggest that a micro-patterned sensor can be simply fabricated at a low cost and the sensitivity of TiO2 thin films can be improved by incorporating MWCNTs.

Original languageEnglish
Pages (from-to)89-93
Number of pages5
JournalThin Solid Films
Volume529
DOIs
Publication statusPublished - 2013 Feb 1

Fingerprint

Carbon Nanotubes
Carbon Monoxide
Carbon nanotubes
Gases
carbon nanotubes
Thin films
thin films
gases
sensors
Sensors
conductivity
Electrons
sensitivity
Photoresists
photoresists
Etching
crystallinity
electrons
etching
Oxidation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Kim, Hyuncheol ; Hong, Min Hee ; Jang, Ho Won ; Yoon, Seok Jin ; Park, Hyung-Ho. / CO gas sensing properties of direct-patternable TiO2 thin films containing multi-wall carbon nanotubes. In: Thin Solid Films. 2013 ; Vol. 529. pp. 89-93.
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CO gas sensing properties of direct-patternable TiO2 thin films containing multi-wall carbon nanotubes. / Kim, Hyuncheol; Hong, Min Hee; Jang, Ho Won; Yoon, Seok Jin; Park, Hyung-Ho.

In: Thin Solid Films, Vol. 529, 01.02.2013, p. 89-93.

Research output: Contribution to journalArticle

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