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@ARTICLE{Iyer:1008689,
author = {Iyer, Priyanka and Gompper, Gerhard and Fedosov, Dmitry A.},
title = {{D}ynamic shapes of floppy vesicles enclosing active
{B}rownian particles with membrane adhesion},
journal = {Soft matter},
volume = {19},
number = {19},
issn = {1744-683X},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2023-02480},
pages = {3436 - 3449},
year = {2023},
abstract = {Recent advances in micro- and nano-technologies allow the
construction of complex active systems from biological and
synthetic materials. An interesting example is active
vesicles, which consist of a membrane enclosing
self-propelled particles, and exhibit several features
resembling biological cells. We investigate numerically the
behavior of active vesicles, where the enclosed
self-propelled particles can adhere to the membrane. A
vesicle is represented by a dynamically triangulated
membrane, while the adhesive active particles are modelled
as active Brownian particles (ABPs) that interact with the
membrane via the Lennard-Jones potential. Phase diagrams of
dynamic vesicle shapes as a function of ABP activity and
particle volume fraction inside the vesicle are constructed
for different strengths of adhesive interactions. At low ABP
activity, adhesive interactions dominate over the propulsion
forces, such that the vesicle attains near static
configurations, with protrusions of membrane-wrapped ABPs
having ring-like and sheet-like structures. At moderate
particle densities and strong enough activities, active
vesicles show dynamic highly-branched tethers filled with
string-like arrangements of ABPs, which do not occur in the
absence of particle adhesion to the membrane. At large
volume fractions of ABPs, vesicles fluctuate for moderate
particle activities, and elongate and finally split into two
vesicles for large ABP propulsion strengths. We also analyze
membrane tension, active fluctuations, and ABP
characteristics (e.g., mobility, clustering), and compare
them to the case of active vesicles with non-adhesive ABPs.
The adhesion of ABPs to the membrane significantly alters
the behavior of active vesicles, and provides an additional
parameter for controlling their behavior.},
cin = {IBI-5 / IAS-2},
ddc = {530},
cid = {I:(DE-Juel1)IBI-5-20200312 / I:(DE-Juel1)IAS-2-20090406},
pnm = {5243 - Information Processing in Distributed Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5243},
typ = {PUB:(DE-HGF)16},
pubmed = {37132446},
UT = {WOS:000979621300001},
doi = {10.1039/D3SM00004D},
url = {https://juser.fz-juelich.de/record/1008689},
}