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- W2079789631 abstract "Water wettability of Si/SiO2 surfaces was controlled by the formation of SAMs terminating in 1-alkyl-3-(3-silylpropyl)imidazolium ions and the anion exchange on the surfaces (“direct anion exchange”). The exchange was confirmed by X-ray photoelectron spectroscopy, and the water wettability was measured as a water contact angle by contact angle goniometry. We found that anions played a great role in determining water wettability of Si/SiO2 surfaces. For example, water contact angles of Si/SiO2 surfaces presenting 1-methyl-3-(3-silylpropyl)imidazolium ions changed from 28 to 42° when the counteranion Cl- was exchanged with PF6-. In addition to the anions, the N-alkyl groups of imidazolium cations were also found to be important in determining water wettability: we did not observe any significant changes in the contact angles of Si/SiO2 surfaces presenting 1-butyl-3-(3-silylpropyl)imidazolium ions by the anion exchange. We also demonstrated that the reaction rate of the direct anion exchange was affected by a choice of solvents: the anion exchange from Cl- to PF6- was the fastest in an aqueous solution." @default.
- W2079789631 created "2016-06-24" @default.
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- W2079789631 date "2004-03-18" @default.
- W2079789631 modified "2023-10-11" @default.
- W2079789631 title "Control of Wettability by Anion Exchange on Si/SiO<sub>2</sub> Surfaces" @default.
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- W2079789631 doi "https://doi.org/10.1021/la036340q" @default.
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