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@ARTICLE{Hoore:842288,
author = {Hoore, Masoud and Rack, Kathrin and Fedosov, Dmitry A and
Gompper, Gerhard},
title = {{F}low-induced adhesion of shear-activated polymers to a
substrate},
journal = {Journal of physics / Condensed matter},
volume = {30},
number = {6},
issn = {1361-648X},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {FZJ-2018-00535},
pages = {064001},
year = {2018},
abstract = {Adhesion of polymers and proteins to substrates plays a
crucial role in many technological applications and
biological processes. A prominent example is the von
Willebrand factor (VWF) protein, which is essential in blood
clotting as it mediates adhesion of blood platelets to the
site of injury at high shear rates. VWF is activated by flow
and is able to bind efficiently to damaged vessel walls even
under extreme flow-stress conditions; however, its adhesion
is reversible when the flow strength is significantly
reduced or the flow is ceased. Motivated by the properties
and behavior of VWF in flow, we investigate adhesion of
shear-activated polymers to a planar wall in flow and
whether the adhesion is reversible under flow stasis. The
main ingredients of the polymer model are cohesive
inter-monomer interactions, a catch bond with the adhesive
surface, and the shear activation/deactivation of polymer
adhesion correlated with its stretching in flow. The
cohesive interactions within the polymer maintain a globular
conformation under low shear stresses and allow polymer
stretching if a critical shear rate is exceeded, which is
directly associated with its activation for adhesion. Our
results show that polymer adhesion at high shear rates is
significantly stabilized by catch bonds, while at the same
time they also permit polymer dissociation from a surface at
low or no flow stresses. In addition, the
activation/deactivation mechanism for adhesion plays a
crucial role in the reversibility of its adhesion. These
observations help us better understand the adhesive behavior
of VWF in flow and interpret its adhesion malfunctioning in
VWF-related diseases.},
cin = {ICS-2 / IAS-2 / JARA-HPC},
ddc = {530},
cid = {I:(DE-Juel1)ICS-2-20110106 / I:(DE-Juel1)IAS-2-20090406 /
$I:(DE-82)080012_20140620$},
pnm = {553 - Physical Basis of Diseases (POF3-553) / Margination
and Adhesion of Particles and Cells in Blood Flow
$(jiff44_20140501)$},
pid = {G:(DE-HGF)POF3-553 / $G:(DE-Juel1)jiff44_20140501$},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29297854},
UT = {WOS:000422878100001},
doi = {10.1088/1361-648X/aaa4d5},
url = {https://juser.fz-juelich.de/record/842288},
}