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000009819 0247_ $$2DOI$$a10.1021/jp1009912
000009819 0247_ $$2WOS$$aWOS:000278301000008
000009819 0247_ $$2MLZ$$aPapagiannopoulosKMPR2010_2
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000009819 041__ $$aeng
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000009819 084__ $$2WoS$$aChemistry, Physical
000009819 1001_ $$0P:(DE-HGF)0$$aPapagiannopoulos, A.$$b0
000009819 245__ $$aSelf-Assembled Nanoparticles from a Block Polyelectrolyte in Aqueous Media: Structural Characterization by SANS
000009819 260__ $$aWashington, DC$$bSoc.$$c2010
000009819 300__ $$a7482 - 7488
000009819 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000009819 440_0 $$03694$$aJournal of Physical Chemistry B$$v114$$x1520-6106$$y22
000009819 500__ $$aThe SANS experiments have been supported by the European Commission under the seventh Framework Programme through the Key Action: Strengthening the European Research Area, Research Infrastructures. Contract No.: 226507 (NMI3). The SANS work is based on experiments performed at the Mich Centre for Neutron Science JCNS, Forschungszentrum Julich, Germany.
000009819 520__ $$aWe present a small angle neutron scattering (SANS) study of polystyrene-b-sodium (sulfamate/carboxylate) isoprene (PS-PSCI) nanoparticles in aqueous media. The SANS experiments are complemented by static and dynamic light scattering measurements. A detailed analysis of the scattering form factor obtained by SANS for the self-assembled block polyelectrolyte spherical nanoparticles implies a two-region power-law model for the radial volume fraction profiles. The theoretically predicted scaling of the osmotic brush regime phi(r) approximately r(-2) for the inner region and the osmotic annealing brush regime phi(r) approximately r(-8/3) for the outer region are in agreement with our experimental findings. A concentrated shell of PSCI polyelectrolyte chains collapsed on the polystyrene core is needed in the form factor analysis so that the aggregation number of the nanoparticles is self-consistent. The self-assembled nanoparticles are found to be kinetically frozen i.e. their aggregation number is not sensitive to the solution conditions and is defined by the preparation protocol. The size of the spherical nanoparticles tends to decrease upon the addition of salt and the drop of pH.
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000009819 650_2 $$2MeSH$$aButadienes: chemistry
000009819 650_2 $$2MeSH$$aCarboxylic Acids: chemistry
000009819 650_2 $$2MeSH$$aHemiterpenes: chemistry
000009819 650_2 $$2MeSH$$aMolecular Structure
000009819 650_2 $$2MeSH$$aNanoparticles: chemistry
000009819 650_2 $$2MeSH$$aNeutron Diffraction
000009819 650_2 $$2MeSH$$aPentanes: chemistry
000009819 650_2 $$2MeSH$$aPolystyrenes: chemistry
000009819 650_2 $$2MeSH$$aScattering, Small Angle
000009819 650_2 $$2MeSH$$aWater: chemistry
000009819 650_7 $$00$$2NLM Chemicals$$aButadienes
000009819 650_7 $$00$$2NLM Chemicals$$aCarboxylic Acids
000009819 650_7 $$00$$2NLM Chemicals$$aHemiterpenes
000009819 650_7 $$00$$2NLM Chemicals$$aPentanes
000009819 650_7 $$00$$2NLM Chemicals$$aPolystyrenes
000009819 650_7 $$028210-41-5$$2NLM Chemicals$$apolystyrene sulfonic acid
000009819 650_7 $$07732-18-5$$2NLM Chemicals$$aWater
000009819 650_7 $$078-79-5$$2NLM Chemicals$$aisoprene
000009819 650_7 $$2WoSType$$aJ
000009819 693__ $$0EXP:(DE-MLZ)KWS2-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)KWS2-20140101$$6EXP:(DE-MLZ)NL3ao-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz$$eKWS-2: Small angle scattering diffractometer$$fNL3ao$$x0
000009819 7001_ $$0P:(DE-HGF)0$$aKarayianni, M.$$b1
000009819 7001_ $$0P:(DE-HGF)0$$aMountrichas, G.$$b2
000009819 7001_ $$0P:(DE-HGF)0$$aPispas, S.$$b3
000009819 7001_ $$0P:(DE-Juel1)VDB4342$$aRadulescu, A.$$b4$$uFZJ
000009819 773__ $$0PERI:(DE-600)2006039-7$$a10.1021/jp1009912$$gVol. 114, p. 7482 - 7488$$p7482 - 7488$$q114<7482 - 7488$$tThe @journal of physical chemistry <Washington, DC> / B$$v114$$x1520-6106$$y2010
000009819 8567_ $$uhttp://dx.doi.org/10.1021/jp1009912
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000009819 9132_ $$0G:(DE-HGF)POF3-623$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$aDE-HGF$$bForschungsbereich Materie$$lIn-house research on the structure, dynamics and function of matter$$vNeutrons for Research on Condensed Matter$$x0
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