Evanescent sensing in doped sol-gel glass films

John E. Lee, S. Scott Saavedra

Research output: Contribution to journalArticlepeer-review

84 Scopus citations


Bromophenol blue, a pH indicator, was entrapped in porous glass films prepared by the sol-gel method. The colorimetric response of the films to pH was assessed visibly and by attenuated total reflectance spectrometry. The entrapped indicator was nonleachable and responded to solution pH changes in a reversible manner. The immobilization of indicator molecules in porous sol-gel films appears to be a particulary promising approach to optical waveguide sensor development.

Original languageEnglish (US)
Pages (from-to)265-269
Number of pages5
JournalAnalytica Chimica Acta
Issue number3
StatePublished - Jan 28 1994


  • Attenuated total reflectance
  • Bromophenol blue
  • Colorimetry
  • Indicators
  • Porous glass films
  • Sol-gel method

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy


Dive into the research topics of 'Evanescent sensing in doped sol-gel glass films'. Together they form a unique fingerprint.

Cite this