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Self-assembled nanoparticles from a block polyelectrolyte in aqueous media: structural characterization by SANS

hal.structure.identifierTheoretical and Physical Chemistry Institute
dc.contributor.authorPAPAGIANNOPOULOS, Aristeidis
hal.structure.identifierTheoretical and Physical Chemistry Institute
dc.contributor.authorKARAYIANNI, Maria
hal.structure.identifierTheoretical and Physical Chemistry Institute
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMOUNTRICHAS, Grigoris
hal.structure.identifierTheoretical and Physical Chemistry Institute
dc.contributor.authorPISPAS, Stergios
hal.structure.identifierInstitut für Festkrperforschung
dc.contributor.authorRADULESCU, Aurel
dc.date.issued2010
dc.identifier.issn1520-6106
dc.description.abstractEnWe present a small angle neutron scattering (SANS) study of polystyrene-b-sodium (sulfamate/carboxylate) isoprene (PS-PSCI) nanoparticles in aqueous media. The SANS experiments are complemented by static and dynamic light scattering measurements. A detailed analysis of the scattering form factor obtained by SANS for the self-assembled block polyelectrolyte spherical nanoparticles implies a two-region power-law model for the radial volume fraction profiles. The theoretically predicted scaling of the osmotic brush regime (r) r−2 for the inner region and the osmotic annealing brush regime (r) r−8/3 for the outer region are in agreement with our experimental findings. A concentrated shell of PSCI polyelectrolyte chains collapsed on the polystyrene core is needed in the form factor analysis so that the aggregation number of the nanoparticles is self-consistent. The self-assembled nanoparticles are found to be kinetically frozen i.e. their aggregation number is not sensitive to the solution conditions and is defined by the preparation protocol. The size of the spherical nanoparticles tends to decrease upon the addition of salt and the drop of pH.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enSelf-assembled nanoparticles from a block polyelectrolyte in aqueous media: structural characterization by SANS
dc.typeArticle de revue
dc.identifier.doi10.1021/jp1009912
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Physical Chemistry B
bordeaux.page7482-7488
bordeaux.volume114
bordeaux.issue22
bordeaux.peerReviewedoui
hal.identifierhal-00492549
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00492549v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Physical%20Chemistry%20B&rft.date=2010&rft.volume=114&rft.issue=22&rft.spage=7482-7488&rft.epage=7482-7488&rft.eissn=1520-6106&rft.issn=1520-6106&rft.au=PAPAGIANNOPOULOS,%20Aristeidis&KARAYIANNI,%20Maria&MOUNTRICHAS,%20Grigoris&PISPAS,%20Stergios&RADULESCU,%20Aurel&rft.genre=article


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