Vapour-induced conformational changes of macromolecules at interfaces: real-time SFM observation

Авторы: Gallyamov Marat O., Krzysztof Matyjaszewski, Alexei Khokhlov, Martin Möller
Сборник: Book of abstracts, European Polymer Congress EPF'09 (12.-17. July 2009, Graz, Austria)
Тезисы
Год издания: 2009
Место издания: Graz, Austria
Первая страница: 277
Аннотация: Saturated vapour surroundings affect strongly the conformation of macromolecules adsorbed onto hard substrates. Variation of vapour composition may induce conformational transitions of single individual macromolecules: collapse or extension depending on the vapour nature. The same is valid for ultrathin polymer films spreading or dewetting in different vapours. The vapour-induced morphology transformations on a substrate may be observed directly using scanning force microscopy (SFM). Brush-like macromolecules are very convenient for such observations. Yet, some progress has been achieved with visualization of single linear flexible molecules during vapour-induced motion. The driving force of the transformations is related to the competition in spreading between the polymer layer and co-adsorbed layer of vapour phase molecules (surface tension balance). This model has been verified in experiments with different macromolecules, different vapours, and different substrates.
Добавил в систему: Галлямов Марат Олегович

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