Dyes for use in integrated optical sensors

Daniel Citterio, Luzi Jenny, Stefan Rásonyi, Ursula E. Spichiger

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

In order to use chemically selective optode membranes in monolithically integrated optical sensors, the membrane's optical signal output ideally has to be in the near-infrared (NIR) wavelength range. Dyes showing light absorbance in the NIR range have been evaluated for their suitability as chromoionophores in plasticized poly(vinyl chloride) (PVC) membranes. The influence of the membrane plasticizer polarity on the optical properties and on the acidity of the dye has been investigated. It is shown that the pKa of the chromoionophore in the membrane phase can be shifted by changing the plasticizer polarity.

Original languageEnglish
Pages (from-to)202-206
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume39
Issue number1-3
DOIs
Publication statusPublished - 1997 Jan 1
Externally publishedYes

Keywords

  • Chromoionophores
  • Integrated optical sensors
  • Near-infrared dyes
  • Plasticizers

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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