Integrated optical sensors based on refractometry of ion-selective membranes

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

doi:10.1016/0925-4005(95)01694-5

Integrated optical sensors based on refractometry of ion-selective membranes

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

Research output: Contribution to journal › Article › peer-review

46 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 language	English
Pages (from-to)	277-285
Number of pages	9
Journal	Sensors and Actuators: B. Chemical
Volume	29
Issue number	1-3
DOIs	https://doi.org/10.1016/0925-4005(95)01694-5
Publication status	Published - 1995 Oct
Externally published	Yes

Keywords

Integrated optical sensors
Ion-selective membranes
Refractometry

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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10.1016/0925-4005(95)01694-5

Cite this

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title = "Integrated optical sensors based on refractometry of ion-selective membranes",

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.",

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AU - Freiner, D.

AU - Kunz, R. E.

AU - Citterio, D.

AU - Spichiger, U. E.

AU - Gale, M. T.

PY - 1995/10

Y1 - 1995/10

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AB - 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.

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KW - Refractometry

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Integrated optical sensors based on refractometry of ion-selective membranes

Abstract

Keywords

ASJC Scopus subject areas

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