In situ monitoring of the H concentration change near an electrode surface through electrolysis using slab optical waveguide pH sensor |
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Authors: | Hiroki Hotta Kazuya Tatsuno Yoji Hattori Takuya Hashimoto Masayuki Uehara Kin-ichi Tsunoda |
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Affiliation: | aDepartment of Chemistry and Chemical Biology, Gunma University, Tenjin 1-5-1, Kiryu, Gunma 376-8515, Japan |
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Abstract: | The H+ concentration change was monitored near an electrode surface through an electrolysis using a slab optical waveguide technique. Indium tin oxide transparent electrode modified by porous insulating polymer to which methyl red was covalently immobilized was used as a guiding layer, and the absorbance change of the polymer film was monitored. H+ generation at the vicinity of the electrode through the oxidation of ascorbic acid could be monitored by this technique. |
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Keywords: | Slab optical waveguide pH sensor Ascorbic acid Methyl red |
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