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@ARTICLE{Papagiannopoulos:9819,
author = {Papagiannopoulos, A. and Karayianni, M. and Mountrichas, G.
and Pispas, S. and Radulescu, A.},
title = {{S}elf-{A}ssembled {N}anoparticles from a {B}lock
{P}olyelectrolyte in {A}queous {M}edia: {S}tructural
{C}haracterization by {SANS}},
journal = {The journal of physical chemistry / B},
volume = {114},
issn = {1520-6106},
address = {Washington, DC},
publisher = {Soc.},
reportid = {PreJuSER-9819},
pages = {7482 - 7488},
year = {2010},
note = {The 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.},
abstract = {We 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.},
keywords = {Butadienes: chemistry / Carboxylic Acids: chemistry /
Hemiterpenes: chemistry / Molecular Structure /
Nanoparticles: chemistry / Neutron Diffraction / Pentanes:
chemistry / Polystyrenes: chemistry / Scattering, Small
Angle / Water: chemistry / Butadienes (NLM Chemicals) /
Carboxylic Acids (NLM Chemicals) / Hemiterpenes (NLM
Chemicals) / Pentanes (NLM Chemicals) / Polystyrenes (NLM
Chemicals) / polystyrene sulfonic acid (NLM Chemicals) /
Water (NLM Chemicals) / isoprene (NLM Chemicals) / J
(WoSType)},
cin = {IFF-4 / IFF-5 / Jülich Centre for Neutron Science JCNS
(JCNS) ; JCNS},
ddc = {530},
cid = {I:(DE-Juel1)VDB784 / I:(DE-Juel1)VDB785 /
I:(DE-Juel1)JCNS-20121112},
pnm = {BioSoft: Makromolekulare Systeme und biologische
Informationsverarbeitung / Großgeräte für die Forschung
mit Photonen, Neutronen und Ionen (PNI)},
pid = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
shelfmark = {Chemistry, Physical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:20481490},
UT = {WOS:000278301000008},
doi = {10.1021/jp1009912},
url = {https://juser.fz-juelich.de/record/9819},
}