Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polyelectrolyte Layer-by-Layer Assembly from Self-Consistent Field
  Calculations   We have modeled the layer-by-layer assembly process of flexible
polyelectrolytes on flat surfaces. The multilayer has a three-zone structure.
An exponential growth is found for the first several layers, followed by a
linear growth for subsequent layers evolving towards a steady state. While
adjacent layers are highly interpenetrating, stratification can be seen for
every four or more layers. The effects of surface charge density, bulk salt
concentration, and solvent quality on the thickness and internal structure of
the multilayer are also studied. Our results agree with experimental findings.

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The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: eess