TY  - JOUR
AU  - Sunil, S.P.
AU  - Fedosov, D.A.
AU  - Chatterji, A.
AU  - Winkler, R.G.
AU  - Gompper, G.
TI  - Conformational and dynamical properties of ultra-soft colloids in semi-dilute solutions under shear flow
JO  - Journal of physics / Condensed matter
VL  - 24
SN  - 0953-8984
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-111836
SP  - 464103
PY  - 2012
N1  - Record converted from VDB: 16.11.2012
AB  - We investigate structural and dynamical properties of ultra-soft colloids in dilute and semi-dilute solutions by hybrid mesoscale simulations under linear shear flow. In particular, the influence of functionality on these properties is addressed. Our study combines molecular dynamics simulations for the solute with the multiparticle collision dynamics approach for the coarse-grained solvent. The star polymers exhibit large conformational and orientational changes in shear flow, which we characterize by the radius of gyration tensor and the alignment angle. These quantities show a universal dependence on a concentration- and functionality-dependent Weissenberg number with slight deviations at high shear rates. Moreover, the star polymers display a rotational dynamics with a shear-rate- and concentration-dependent rotation frequency. We attribute the concentration dependence to the screening of hydrodynamic interactions in semi-dilute star-polymer solutions.
LB  - PUB:(DE-HGF)16
C6  - pmid:23114112
UR  - <Go to ISI:>//WOS:000310836300004
DO  - DOI:10.1088/0953-8984/24/46/464103
UR  - https://juser.fz-juelich.de/record/111836
ER  -