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Self-Assembled Monolayers on Mercury Probed in a Modified Surface Force Apparatusстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Clasohm L.Y., Chen M., Knoll W., Vinogradova O.I., Horn R.G.
- Журнал: Journal of Physical Chemistry B
- Том: 110
- Номер: 51
- Год издания: 2006
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 25931
- Последняя страница: 25940
- DOI: 10.1021/jp062340y
- Аннотация: Self-assembled monolayers (SAMs) of three thiol compounds formed on mercury are investigated by a combination of cyclic voltammetry, electrocapillary curves, and a novel method of measuring electrical doublelayer properties. The last method involves a modified surface force apparatus in which a flat mica surface is pressed down toward a fixed mercury drop held beneath it, while both are immersed in aqueous electrolyte solution. Optical interference measurements are made of the mica-mercury separation as a function of electrical potential applied to the mercury, which yields information on the double-layer interaction between the two surfaces. Mercury is decorated by SAMs of 11-mercapto-1-undecanoic acid, which is shown to bring negative charge to the mercury/aqueous interface due to dissociation of the carboxylic acid groups; 11-mercapto-1- undecanol, which although it is uncharged changes the dipole potential of the interface; and 1-undecanethiol, which likewise changes the dipole potential, but by a different amount. The difference between the changes in dipole potential (90 mV) can be related to the different terminal groups of these two SAMs, -CH3 compared to -OH, that are in contact with the aqueous phase.
- Добавил в систему: Виноградова Ольга Игоревна