Tunable interconnectivity of mesostructured cobalt oxide materials for sensing applications

Chueh Yang Liu, Chia F. Chen*, Leu-Jih Perng

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

A mesostructured cobalt oxide microsensor was fabricated using a template replication method under different hydrothermal treatments, and attempts were made to enhance the response of this gas sensor. To evaluate the sensing performance, the sensing materials were deposited via the dielectrophoresis (DEP) process, on micro-hot-plate platforms with interdigitated electrodes. The resistance changed when the carbon monoxide target gas was injected at the optimum temperature. The mesostructured cobalt oxide material with high hydrothermal treatment revealed the well-ordered domains, whereas with low hydrothermal treatment it did not contain ordered domains. Moreover, the cobalt oxide high hydrothermal material had 1.5 times the response to 70 ppm carbon monoxide as the low hydrothermal treatment sample. The unobstructed interconnectivity promotes gas diffusion and increases the active surface areas. Crown

Original languageEnglish
Pages (from-to)700-703
Number of pages4
JournalSensors and Actuators, B: Chemical
Volume137
Issue number2
DOIs
StatePublished - 2 Apr 2009

Keywords

  • Active surface area
  • Cobalt oxide
  • Dielectrophoresis
  • Mesostructured

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