Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coverage Fluctuations and Correlations in Nanoparticle-Catalyzed
  Diffusion-Influenced Bimolecular Reactions   The kinetic processes in nanoparticle-based catalysis are dominated by large
fluctuations and spatiotemporal heterogeneities, in particular for
diffusion-influenced reactions which are far from equilibrium. Here, we report
results from particle-resolved reaction-diffusion simulations of steady-state
bimolecular reactions catalyzed on the surface of a single, perfectly spherical
nanoparticle. We study various reactant adsorption and diffusion regimes, in
particular considering the crowding effects of the reaction products. Our
simulations reveal that fluctuations, significant coverage cross-correlations,
transient self-poisoning, related domain formation, and excluded-volume effects
on the nanoparticle surface lead to a complex kinetic behavior, sensitively
tuned by the balance between adsorption affinity, mixed 2D and 3D diffusion,
and chemical reaction propensity. The adsorbed products are found to influence
the correlations and fluctuations, depending on overall reaction speed, thereby
going beyond conventional steric (e.g., Langmuir-like) product inhibition
mechanisms. We summarize our findings in a state diagram depicting the
nonlinear kinetic regimes by an apparent surface reaction order in dependence
of the intrinsic reaction propensity and adsorption strength. Our study using a
simple, perfectly spherical, and inert nanocatalyst demonstrates that
spatiotemporal heterogeneities are intrinsic to the reaction-diffusion problem
and not necessarily caused by any dynamical surface effects from the catalyst
(e.g., dynamical surface reconstruction), as often argued.

25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
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The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex