Chemical sensing by analysing dynamics of plasma polymer film-coated sensors

Masayuki Nakamura, Iwao Sugimoto, Hiroki Kuwano, Robert Lemos

研究成果: Article査読

28 被引用数 (Scopus)

抄録

A chemical sensing system that incorporates unique sensor films and uses pattern recgonition of their dynamic responses is presented. This system consists of a sensor array of quartz-crystal microbalances coated with plasma polymer films. The films, synthesized by radio-frequency sputtering, are useful because of their high density of radical sites and unsaturated bonds. When this sensor array is exposed to a gas, the adsorption and desorption of the target gas causes a dynamic frequency response in each piezoelectric sensor. The sensor response is analysed by an autoregressive model typically to estimate the parameters of dynamic systems. This model's coefficients reflect the sensor dynamics, providing pattern vectors that characterize the target gas. Based on this model, classification maps for single gases can be created with these pattern vectors. Thesse maps show that the dynamic sensor response provides useful information for gas classification. This model also confirms that our sensing system can identify the components of a gas mixture.

本文言語English
ページ(範囲)231-237
ページ数7
ジャーナルSensors and Actuators: B. Chemical
20
2-3
DOI
出版ステータスPublished - 1994 6月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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