Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bridging transitions and capillary forces for colloids in a slit   Capillary bridges can form between colloids immersed in a two phase fluid,
e.g., in a binary liquid mixture, if the surface of the colloids prefers the
species other than the one favored in the bulk liquid. Here, we study the
formation of liquid bridges induced by confining colloids to a slit, with the
slit walls having a preference opposite to the one of the colloid surface.
Using mean field theory, we show that there is a line of first-order phase
transitions between the bridge and the no-bridge states, which ends at a
critical point. By decreasing the slit width, this critical point is shifted
towards smaller separations between the colloids. However, at very small
separations, and far from criticality, we observe only a minor influence of the
slit width on the location of the transition. Monte Carlo simulations of the
Ising model, which mimics incompressible binary liquid mixtures, confirm the
occurrence of the bridging transitions, as manifested by the appearance of
bistable regions where both the bridge and the no-bridge configurations are
(meta)stable. Interestingly, we find no bistability in the case of small
colloids, but we observe a sharpening of the transition when the colloid size
increases. In addition, we demonstrate that the capillary force acting between
the colloids can depend sensitively on the slit width, and varies drastically
with temperature, thus achieving strengths orders of magnitude higher than at
criticality of the fluid.

11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an