Influence of polymeric counter-ions on the Langmuir- and LB-film stability of amphiphilic 1,3,4-oxadiazoles

Autor:	José Antonio de Saja, Knut Morawetz, Ludwig Brehmer, Olga Franco, Anke Freydank, Jürgen Reiche, S. Katholy
Rok vydání:	2002
Předmět:	Langmuir Brewster's angle Kinetics Analytical chemistry Oxadiazole Polyelectrolyte Ion symbols.namesake chemistry.chemical_compound Colloid and Surface Chemistry chemistry Chemical engineering Amphiphile Microscopy symbols
Zdroj:	Colloids and Surfaces A: Physicochemical and Engineering Aspects. :119-126
ISSN:	0927-7757
Popis:	The effect of the polyelectrolyte complexation of an amphiphilic diphenyl-1,3,4-oxadiazole with a carboxylic head group is studied experimentally as a function of the polyelectrolyte concentration and of the subphase pH. The surface pressure–area isotherms, surface potential kinetics and Brewster angle microscopy images are used in order to gain insight into the influence of the polyelectrolyte complexation on the structural evolution of the Langmuir film, as well as its time stability. After polyelectroyte complexation, a reproducible Langmuir–Blodgett (LB-) deposition of well ordered Y-type films proved to be possible. The structure of these films was investigated by means of X-ray specular reflectivity (XSR) and scanning force microscopy (SFM) measurements. The influence of the polyelectrolyte concentration and of the subphase pH on structure and stability of the oxadiazole Langmuir films is studied.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d2b5985347db99dcd61af4c68760e4cd https://doi.org/10.1016/s0927-7757(01)00923-2 Zobrazit plný text záznamu Full Text from ScienceDirect