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Radji, S., Alem, H., Demoustier-Champagne, S., Jonas, A. M. & Cuenot, S. (2012) Investigation of Thermoresponsive Nano-Confined Polymer Brushes by AFM-Based Force Spectroscopy. Macromol. Chem. Phys. 213 580–586. 
Added by: Laurent Cournède (2016-03-10 21:28:39)
Type de référence: Article
DOI: 10.1002/macp.201100636
Numéro d'identification (ISBN etc.): 1022-1352
Clé BibTeX: Radji2012
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Catégories: PMN
Mots-clés: atom-transfer radical polymerization, atomic force microscopy, collapse, gels, grafting density, Mechanical properties, microscopy, molecular-weight, n-isopropylacrylamide, pH, phase, polymer brushes, porous membrane, temperature, thermoresponsive polymers
Créateurs: Alem, Cuenot, Demoustier-Champagne, Jonas, Radji
Collection: Macromol. Chem. Phys.
Consultations : 9/379
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
PNIPAM polymer brushes are synthesized in nanopores of track-etched membranes. The internal structure of these nano-confined brushes is studied by AFM force spectroscopy experiments as a function of the synthesis conditions. The approach force vs. distance profiles are fitted using the Alexander-de Gennes model to determine the grafting density, and the worm-like chain model is used to estimate the chain length from the retract profiles. The grafting density for brushes synthesized within 80 nm pores is ten times lower than that obtained in 330 nm pores. For the same polymerization time, the chain lengths are much lower if the synthesis is carried out in small pores. The elastic properties of the brushes are also directly related to the confinement conditions.
Added by: Laurent Cournède  
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