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@ARTICLE{Squarcini:877248,
author = {Squarcini, A. and Maciołek, A. and Eisenriegler, E. and
Dietrich, S.},
title = {{C}ritical {C}asimir interaction between colloidal
{J}anus-type particles in two spatial dimensions},
journal = {Journal of statistical mechanics: theory and experiment},
volume = {2020},
number = {4},
issn = {1742-5468},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {FZJ-2020-02074},
pages = {043208},
year = {2020},
abstract = {We study colloidal particles with chemically inhomogeneous
surfaces suspended in a critical binary liquid mixture. The
inhomogeneous particle surface is composed of patches with
alternating adsorption preferences for the two components of
the binary solvent. By describing the binary liquid mixture
at its consolute point in terms of the critical Ising model
we exploit its conformal invariance in two spatial
dimension. This allows us to determine exactly the universal
profiles of the order parameter, the energy density, and the
stress tensor as well as some of their correlation functions
around a single particle for various shapes and
configurations of the surface patches. The formalism
encompasses several interesting configurations, including
Janus particles of circular and needle shapes with dipolar
symmetry and a circular particle with quadrupolar symmetry.
From these single-particle properties we construct the
so-called small particle operator expansion (SPOE), which
enables us to obtain asymptotically exact expressions for
the position- and orientation-dependent critical Casimir
interactions of the particles with distant objects, such as
another particle or the confining walls of a half plane,
strip, or wedge, with various boundary conditions for the
order parameter. In several cases we compare the
interactions at large distances with the ones at close
distance (but still large on the molecular scale). We also
compare our analytical results for two Janus particles with
recent simulation data.},
cin = {IBI-5},
ddc = {530},
cid = {I:(DE-Juel1)IBI-5-20200312},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000528535500001},
doi = {10.1088/1742-5468/ab7658},
url = {https://juser.fz-juelich.de/record/877248},
}