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ZB 10 - Soft Condensed Matter (R. Holyst)

We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!

Publication

Stable, ordered multilayers of partially fluorinated bolaamphiphiles at the air-water interface

Author(s): Paczesny, Jan and Niton, Patrycja and Zywocinski, Andrzej and Sozanski, and Holyst, Robert and Fialkowski, Marcin and Kieffer, Robert Glettner, Benjamin and Tschierske, Carsten and Pociecha, Damian and Gorecka, Ewa
Title: Stable, ordered multilayers of partially fluorinated bolaamphiphiles at the air-water interface
Abstract: The article presents systematic research on Langmuir films of partially bolaamphiphiles of different shapes. Such films exhibit a transition from a monolayer to a trilayer during compression on air-water interface. Further compression gives different results on the shape and degree of fluorination of the molecules. fluorinated compounds form well defined multilayers in a process. The balance between rigidity and flexibility of the adjusted by the fluorination and shape of the molecules, to be the key factor in avoiding irreversible aggregation of the and creating ordered multilayer structures. Anchor-shaped form a trilayer and, subsequently, a 9-layer film due to double roll-over mechanism. In contrast, when trilayer films of bolaamphiphiles are compressed, 5- and 7-layer films are according to a different mechanism. Films of thickness of up to layers were transferred from the water surface to solid substrates a single step procedure without any distortion in the structure of layers. X-ray reflectometry (XRR) was used to measure the thickness the layers. Perfect fits of the XRR data to theoretical equations for a conclusion that the multilayers are well-ordered lamellar These investigations lead to an improvement in the general of trilayer and multilayer formation and indicate that only in exceptional cases it happens due to a roll-over process.
Pages: 5262-5272
Journal: SOFT MATTER
Volume: 8
ID: ISI:000303208700020
Year: 2012
DOI: 10.1039/c2sm00022a