Glassy state of polystyrene sulfonate/polyallylamine polyelectrolyte multilayers revealed by the surface force apparatus.

Date publication

février 2005

Auteurs

Membres identifiés du Cancéropôle Est :
Dr VOEGEL Jean-Claude

Tous les auteurs :
Kulcsar A, Voegel JC, Schaaf P, Kekicheff P

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/15697255

Résumé

The interactions between two poly(allylamine)/poly(styrene sulfonate) multilayers made of 4.5 and 5 bilayers are investigated by the surface force apparatus (SFA). As the two surfaces approach, one reaches a threshold point where a repulsion sets in, until they become barely compressible. Repetitive load/unload cycles show that, once compressed, the films remain almost in their compressed state. This indicates that the poly(allylamine)/poly(styrene sulfonate) films are in a glassy state, in marked difference with the SFA findings on poly-(L-lysine)/poly-L-glutamic acid) multilayers. These results are discussed in the light of linearly and exponentially growing films.

Référence

Langmuir. 2005 Feb 15;21(4):1166-70.