Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spontaneous Imbibition Dynamics of an n-Alkane in Nanopores: Evidence of
  Meniscus Freezing and Monolayer Sticking   Capillary filling dynamics of liquid n-tetracosane (n-C24H50) in a network of
cylindrical pores with 7 and 10 nm mean diameter in monolithic silica glass
(Vycor) exhibit an abrupt temperature-slope change at Ts=54 deg C, ~4 deg C
above bulk and ~16 deg C, 8 deg C, respectively, above pore freezing. It can be
traced to a sudden inversion of the surface tension's T slope, and thus to a
decrease in surface entropy at the advancing pore menisci, characteristic of
the formation of a single solid monolayer of rectified molecules, known as
surface freezing from macroscopic, quiescent tetracosane melts. The imbibition
speeds, that are the squared prefactors of the observed square-root-of-time
Lucas-Washburn invasion kinetics, indicate a conserved bulk fluidity and
capillarity of the nanopore-confined liquid, if we assume a flat lying, sticky
hydrocarbon backbone monolayer at the silica walls.

1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph