High sensitive detection of volatile organic compounds using superhydrophobic quartz crystal microbalance

Nina Andreeva, Takahiro Ishizaki, Pavel Baroch, Nagahiro Saito

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

A quartz crystal microbalance (QCM) chemical sensor coated with superhydrophobic film for detecting volatile organic compounds (VOCs) such as formaldehyde and toluene under ambient conditions was developed. The superhydrophobic film was deposited by means of microwave plasma enhanced chemical vapor deposition (MPECVD). The sensitivities of QCM sensor coated with superhydrophobic film to VOCs such as formaldehyde and toluene were investigated under ambient conditions. The sensitivity of the sensor to formaldehyde and toluene was considerably improved by the superhydrophobic surface modification. The surface modification promoted microscopic texturing to the film surface and thus increased the effective specific surface area of the sensor for the adsorption of formaldehyde and toluene. In addition, the adsorption of water molecules was minimized due to the superhydrophobic film deposited on the sensor surface, thus promoting the preferential adsorption of formaldehyde and toluene molecules on the QCM sensor coated with superhydrophobic film, compared to the conventional QCM sensor. Moreover, the adsorption mechanisms of formaldehyde-water and toluene-water molecules to the superhydrophobic film were discussed.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume164
Issue number1
DOIs
Publication statusPublished - 2012 Mar 31
Externally publishedYes

Keywords

  • Chemical sensor
  • Quartz crystal microbalance
  • Superhydrophobicity
  • Volatile organic compounds

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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