期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 115, 期 30, 页码 14914-14921出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp203714a
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资金
- Australian Research Council Special Research Centre
The wettability of a titania surface, whose surface was partially covered with a strongly based octadecyltrihydrosilane, was studied above and below the isoelectric point (or pH(iep)). The advancing water contact angle is at a maximum at the pH(iep), decreasing symmetrically on either side in a Lippmann-like manner. The change in wettability, for a given pH, became more pronounced with increasing salt concentration. Using a non-Nernstian model of the electrical double layer, the experimental dependence of contact angle on both pH and salt concentration was satisfactorily predicted.
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