Integrated optical sensors based on refractometry of ion-selective membranes

D. Freiner, R. E. Kunz, D. Citterio, U. E. Spichiger, M. T. Gale

研究成果: Article査読

44 被引用数 (Scopus)


The properties of optode membranes to be used for realizing miniature integrated optical sensors based on refractometry have been investigated theoretically and experimentally. In situ referencing by using optode and reference membranes on the same chip is a powerful means to discriminate against unspecific effects. The plasticized polymer membranes provide the function of selective extraction and chemical recognition of the analyte. In experiments performed for a pair of such membranes, refractive index differences ≈3 × 10-3 per decade of molar Ca2+ concentration in buffered aqueous solutions have been observed. With the characterized type of sensing pad implanted in a miniature integrated optical device, a typical overall resolution of 0.7 to 0.07% in units of Ca2+ concentration was calculated.

ジャーナルSensors and Actuators: B. Chemical
出版ステータスPublished - 1995 10

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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