Details

Autor(en) / Beteiligte

• DEJEU, J
• BUISSON, L
• GUTH, M. C
• ROIDOR, C
• MEMBREY, F
• CHARRAUT, D
• FOISSY, A

Titel

Early steps of the film growth mechanism in self-assembled multilayers of PAH and PSS on silica polymer uptake, charge balance and AFM analysis

Ist Teil von

• Colloids and surfaces. A, Physicochemical and engineering aspects, 2006-10, Vol.288 (1-3), p.26-35

Ort / Verlag

Amsterdam: Elsevier

Erscheinungsjahr

2006

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This study investigates the growth of self-assembled polyelectrolyte films with strong polyacid (poly(styrene sulfonate), PSS and a weak polybase (poly(allylamine hydrochloride), PAH at pH 9. Addressing the deposit of the first 3 bilayers, we focus on the successive adsorption isotherms, the effect of maintaining a constant pH, the charge balance and the counterions co-adsorption in the successive steps. We also present stepwise AFM images of the film grown on a silica wafer, showing a very heterogeneous morphology with bumps and valleys, totally unlike the expected regular superposition of bi-dimensional polymer layers. Finally, a sketch of the growth mechanism is proposed, featuring most of the experimental observations in the study.