doi: 10.1021/ja0443326.
Interfacial pH at an isolated silica-water surface
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- PMID: 15700985
- DOI: 10.1021/ja0443326
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Interfacial pH at an isolated silica-water surface
J Am Chem Soc.
.
Abstract
Tethering a pH-sensitive dye to a silica surface enables the interfacial pH to be measured optically and is found to be 2 pH units lower than that of the bulk. The positive H+ ions are attracted by the surface potential and have an enhanced concentration consistent with the previously determined surface potential of order -120 mV, with respect to zero in the bulk. A stable near-surface charged layer once formed is not disrupted by the bulk pH.
Comment in
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Comment on "Interfacial pH at an isolated silica-water surface".J Phys Chem B. 2006 Aug 3;110(30):15037-8; discussion 15039-40. doi: 10.1021/jp053008+. J Phys Chem B. 2006. PMID: 16869619 No abstract available.
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