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Opto-Chemical Micro-Capillary Clocks

Wilhelm, S. ; Wolfbeis, Otto S.
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Date of publication of this fulltext: 18 Mar 2011 06:41


Abstract

Opto-chemical capillary clocks are presented that are based on the measurement of a colored segment in a microchannel (a capillary). Color is created by a chromogenic chemistry involving the oxidation of a (virtually colorless) leuco-dye. Poly(ethylene glycol) (PEG) is used as a solvent, and indigo and thioindigo (in their reduced leuco forms) act as oxygen-sensitive dyes. The clock is started by ...

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