Quartz crystal microbalance (QCM) sensor for CH3SH gas by using polyelectrolyte-coated sol-gel film

Masashi Kikuchi, Seimei Shiratori

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

A new structure of sensing film for QCM sensor electrode was investigated. Gas-sensing device for toxic gases requires high sensor sensitivity and quick response. Increasing the surface area of sensing film was effective to improve the sensor sensitivity and response speed of QCM sensors, however it is difficult to increase the surface area of polymeric film. In this paper, Al 2O3 porous film was coated on QCM substrate by sol-gel method between the QCM electrode and polymeric layer in order to increase the surface area of polymeric layer. By using this manner, polymeric sensing films with high porosity can be fabricated without high-temperature treatment. The sensor was evaluated for the detection of methyl mercaptan (CH3SH) by using poly(ethylene imine) (PEI) as polymeric layer. The sensor with Al 2O3 porous layer showed high sensitivity and quick response rather than the sensor without the inorganic layer. The Al 2O3 layer worked for increasing the surface area of polyelectrolyte layer which resulted in the increasing of the sensor sensitivity.

Original languageEnglish
Pages (from-to)564-571
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume108
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - 2005 Jul 22

Fingerprint

Quartz crystal microbalances
quartz crystals
Polyelectrolytes
microbalances
Sol-gels
Gases
gels
sensors
Sensors
gases
Polyetherimides
Electrodes
polymeric films
electrodes
Poisons
Polymer films
Sulfhydryl Compounds
thiols
Sol-gel process
imines

Keywords

  • AlO
  • CHSH
  • Gas sensor
  • Layer-by-layer self-assembly
  • Poly(ethylene imine)
  • Quartz crystal microbalance
  • Sol-gel method

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

Quartz crystal microbalance (QCM) sensor for CH3SH gas by using polyelectrolyte-coated sol-gel film. / Kikuchi, Masashi; Shiratori, Seimei.

In: Sensors and Actuators, B: Chemical, Vol. 108, No. 1-2 SPEC. ISS., 22.07.2005, p. 564-571.

Research output: Contribution to journalArticle

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