Comment on "Interfacial pH at an isolated silica-water surface".
نویسندگان
چکیده
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.
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ورودعنوان ژورنال:
- Journal of the American Chemical Society
دوره 127 6 شماره
صفحات -
تاریخ انتشار 2005