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@ARTICLE{Zhang:4078,
author = {Zhang, Z. and Krishna, N. and Lettinga, M. P. and Vermant,
J. and Grelet, E.},
title = {{R}eversible gelation of rod-like viruses grafted with
thermoresponsive polymers},
journal = {Langmuir},
volume = {25},
issn = {0743-7463},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {PreJuSER-4078},
pages = {2437 - 2442},
year = {2009},
note = {This work was supported by the European network of
excellence-SoftComp. The EU is also acknowledged for funding
through Nanodirect FP7-NMP-2007-SMALL-1, project 213948. We
also thank Sabine Willbold for performing NMR measurement
and Johan Buitenhuis for useful discussion. Jan K. Dhont is
acknowledged for stimulating discussions and for his reading
of the manuscript.},
abstract = {The synthesis and selected macroscopic properties of a new
model system consisting of poly(N-isopropylacrylamide)
(PNIPAM)-coated rod-like fd virus particles are presented.
The sticky rod-like colloids can be used to study effect of
particle shape on gelation transition, the structure and
viscoelasticity of isotropic and nematic gels, and to make
both open isotropic as well as ordered nematic particle
networks. This model system of rod-like colloids, for which
the strength of attraction between the particles is tunable,
is obtained by chemically grafting highly monodisperse
rod-like fd virus particles with thermoresponsive polymers,
e.g. PNIPAM. At room temperature, suspensions of the
resulting hybrid PNIPAM-fd are fluid sols which are in
isotropic or liquid crystalline phases, depending on the
particle concentration and ionic strength. During
heating/cooling, the suspensions change reversibly between
sol and gel state near a critical temperature of
approximately 32 degrees C, close to the lower critical
solution temperature of free PNIPAM. The so-called nematic
gel, which exhibits a cholesteric feature, can therefore be
easily obtained. The gelation behavior of PNIPAM-fd system
and the structure of the nematic gel have been characterized
by rheology, optical microscopy and small-angle X-ray
scattering.},
keywords = {Acrylamides: chemistry / Gelatin: chemistry / Gels:
chemistry / Liquid Crystals: chemistry / Molecular Structure
/ Phase Transition / Polymers: chemistry / Temperature /
Viruses: chemistry / Acrylamides (NLM Chemicals) / Gels (NLM
Chemicals) / Polymers (NLM Chemicals) /
poly(N-isopropylacrylamide) (NLM Chemicals) / Gelatin (NLM
Chemicals) / J (WoSType)},
cin = {IFF-7},
ddc = {670},
cid = {I:(DE-Juel1)VDB787},
pnm = {Kondensierte Materie / NANODIRECT - Toolbox for Directed
and Controlled Self-Assembly of nano-Colloids (213948)},
pid = {G:(DE-Juel1)FUEK414 / G:(EU-Grant)213948},
shelfmark = {Chemistry, Multidisciplinary / Chemistry, Physical /
Materials Science, Multidisciplinary},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:19166277},
UT = {WOS:000263373600078},
doi = {10.1021/la8029903},
url = {https://juser.fz-juelich.de/record/4078},
}