Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge relaxation dynamics of an electrolytic nanocapacitor   Understanding ion relaxation dynamics in overlapping electric double layers
(EDLs) is critical for the development of efficient nanotechnology based
electrochemical energy storage, electrochemomechanical energy conversion and
bioelectrochemical sensing devices as well as controlled synthesis of
nanostructured materials. Here, a Lattice Boltzmann (LB) method is employed to
simulate an electrolytic nanocapacitor subjected to a step potential at t = 0
for various degrees of EDL overlap, solvent viscosities, ratios of cation to
anion diffusivity and electrode separations. The use of a novel, continuously
varying and Galilean invariant, molecular speed dependent relaxation time
(MSDRT) with the LB equation recovers a correct microscopic description of the
molecular collision phenomena and enhances the stability of the LB algorithm.
Results for large EDL overlaps indicated oscillatory behavior for the ionic
current density in contrast to monotonic relaxation to equilibrium for low EDL
overlaps. Further, at low solvent viscosities and large EDL overlaps, anomalous
plasma-like spatial oscillations of the electric field were observed that
appeared to be purely an effect of nanoscale confinement. Employing MSDRT in
our simulations enabled a modeling of the fundamental physics of the transient
charge relaxation dynamics in electrochemical systems operating away from
equilibrium wherein Nernst-Einstein relation is known to be violated.

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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an