Annealing effect on microstructure of ZnO nano-particulate films and VOC gas sensing property

Noriko Saito, Ken Watanabe, Tangi Aubert, Fabien Grasset, Isao Sakaguchi, Hajime Haneda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We synthesized ZnO nano-particulate films by a sol-gel method and evaluated their gas sensing properties. A ZnO colloidal solution of 5.6 nm sized nanocrystals was prepared from zinc acetate in n-propanol and dip-coated on silica glass substrates. The as-deposited ZnO film consisted of 30nm grains. Annealing the films resulted in a growth of the particles, which was confirmed by scanning probe microscopy and UV-Vis spectrometry. The ZnO film annealed at 400°C worked well as a gas sensor device for volatile organic compounds (VOC) gases. The sensitivity was the best in the case of ethanol gas at 350°C. The sensing performances decreased by annealing at higher temperatures due to the coalescence of the ZnO particles.

Original languageEnglish
Pages (from-to)267-270
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume122
Issue number1424
DOIs
Publication statusPublished - Apr 2014

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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