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@ARTICLE{Holmqvist:111854,
author = {Holmqvist, P. and Mohanty, P.S. and Nägele, G. and
Schurtenberger, P. and Heinen, M.},
title = {{S}tructure and {D}ynamics of {L}oosely {C}ross-{L}inked
{I}onic {M}icrogel {D}ispersions in the {F}luid {R}egime},
journal = {Physical review letters},
volume = {109},
issn = {0031-9007},
address = {College Park, Md.},
publisher = {APS},
reportid = {PreJuSER-111854},
pages = {048302},
year = {2012},
note = {We thank Simon Rogers (Research Centre Julich) for
carefully proofreading the letter. P. S. M. and P. S.
acknowledge financial support from the Swiss National
Science Foundation. G. N. and M. H. acknowledge support from
the Deutsche Forschungsgemeinschaft (project B2 in
SFB-TR6).},
abstract = {We report a comprehensive experimental-theoretical study of
the temperature-and concentration-dependent swelling
behavior of weakly cross-linked PNiPAm ionic microgel
particles in the deionized fluid phase. The particles swell
reversibly when the dispersion is cooled from the collapsed
state to lower temperatures. While the collapsed state shows
no dependence on the microgel number density, the swelling
at lower T is more pronounced at lower concentrations. The
static pair correlations and short-time diffusion functions,
and the concentration and temperature dependence of the
microgel radius and effective charge, are studied using
static and dynamic light scattering in combination with
state-of-the-art analytical theoretical schemes based on a
Yukawa-type effective pair potential and a core-shell model.
We show that only such a combined, simultaneous fit of
static and dynamic scattering functions allows for an
unambiguous determination of the microgel radius and
effective charge.},
keywords = {J (WoSType)},
cin = {ICS-3},
ddc = {550},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {BioSoft: Makromolekulare Systeme und biologische
Informationsverarbeitung},
pid = {G:(DE-Juel1)FUEK505},
shelfmark = {Physics, Multidisciplinary},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000306933000012},
doi = {10.1103/PhysRevLett.109.048302},
url = {https://juser.fz-juelich.de/record/111854},
}