Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pore-size dependence and characteristics of water diffusion in slit-like
  micropores   The temperature dependence of the dynamics of water inside microporous
activated carbon fibers (ACF) is investigated by means of incoherent elastic
and quasi- elastic neutron scattering techniques. The aim is to evaluate the
effect of increasing pore size on the water dynamics in these primarily
hydrophobic slit-shaped channels. Using two different micropore sizes (\sim 12
and 18 {\AA}, denoted respectively ACF-10 and ACF-20), a clear suppression of
the mobility of the water molecules is observed as the pore gap or temperature
decreases. This suppression is accompanied by a systematic dependence of the
average translational diffusion coefficient Dr and relaxation time <{\tau}_0>
of the restricted water on pore size and temperature. The observed Dr values
are tested against a proposed scaling law, in which the translational diffusion
coefficient Dr of water within a nanoporous matrix was found to depend solely
on two single parameters, a temperature independent translational diffusion
coefficient Dc associated with the water bound to the pore walls and the ratio
{\theta} of this strictly confined water to the total water inside the pore,
yielding unique characteristic parameters for water transport in these carbon
channels across the investigated temperature range.

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The categories of this paper are: physics
16
The categories of this paper are: stat
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
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The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: cs
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The categories of this paper are: econ