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Fluorescent Beads Coated with Polyaniline: A Novel Nanomaterial for Optical Sensing of pH

Pringsheim, Erika ; Zimin, D. ; Wolfbeis, Otto S.
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Date of publication of this fulltext: 06 Jun 2011 12:22


Abstract

A novel optical pH sensor for the physiological rangehas been developed by these authors. The fluorescence emitted (in a pH-independent manner) by dye-doped polymer nanobeads is modulated by a thin conductive polymer coating (see Figure), whose visible-light absorption strongly varies with pH at values around seven.


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