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Early steps of the film growth mechanism in self-assembled multilayers of PAH and PSS on silica Polymer uptake, charge balance and AFM analysis
- Source :
- Colloids and Surfaces A: Physicochemical and Engineering Aspects, Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier, 2006, 288 (1-3), pp.26-35. ⟨10.1016/j.colsurfa.2006.03.050⟩
- Publication Year :
- 2006
- Publisher :
- HAL CCSD, 2006.
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 09277757
- Database :
- OpenAIRE
- Journal :
- Colloids and Surfaces A: Physicochemical and Engineering Aspects, Colloids and Surfaces A: Physicochemical and Engineering Aspects, Elsevier, 2006, 288 (1-3), pp.26-35. ⟨10.1016/j.colsurfa.2006.03.050⟩
- Accession number :
- edsair.dedup.wf.001..b7d46544bad24b3e72c17372798d5b3b
- Full Text :
- https://doi.org/10.1016/j.colsurfa.2006.03.050⟩