Optical sensing of pH based on polypyrrole films

DOI zum Zitieren dieses Dokuments:: 10.5283/epub.21012

de Marcos, Susana ; Wolfbeis, Otto S.

PDF
(437kB) - Nur für Mitarbeiter des Archivs

Veröffentlichungsdatum dieses Volltextes: 07 Jun 2011 11:14

Alternative Links zum Volltext:DOI

Details

Bibliographische Daten exportieren

Zusammenfassung

An optical sensor for pH is presented which is based on the use of a thin polypyrrole (PPy) film obtained by chemical oxidation of pyrrole and deposited as a < 1 μm film on the walls of a polystyrene cuvette. The spectrum of PPy displays strong absorption in the near infrared at around 900 nm, and a characteristic minimum at around 550 nm. The shape and intensity of the spectrum are pH-dependent ...