Integrated optical sensors based on refractometry of ion-selective membranes

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

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)277-285
Number of pages9
JournalSensors and Actuators: B. Chemical
Volume29
Issue number1-3
DOIs
Publication statusPublished - 1995
Externally publishedYes

Fingerprint

Ion selective membranes
Optical sensors
optical measuring instruments
membranes
Membranes
ions
Optical devices
Refractive index
Polymers
chips
refractivity
aqueous solutions
polymers
Experiments

Keywords

  • Integrated optical sensors
  • Ion-selective membranes
  • Refractometry

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Instrumentation
  • Analytical Chemistry
  • Electrochemistry

Cite this

Integrated optical sensors based on refractometry of ion-selective membranes. / Freiner, D.; Kunz, R. E.; Citterio, Daniel; Spichiger, U. E.; Gale, M. T.

In: Sensors and Actuators: B. Chemical, Vol. 29, No. 1-3, 1995, p. 277-285.

Research output: Contribution to journalArticle

Freiner, D. ; Kunz, R. E. ; Citterio, Daniel ; Spichiger, U. E. ; Gale, M. T. / Integrated optical sensors based on refractometry of ion-selective membranes. In: Sensors and Actuators: B. Chemical. 1995 ; Vol. 29, No. 1-3. pp. 277-285.
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