Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multivalent ion effects on electrostatic stability of virus-like
  nano-shells   Electrostatic properties and stability of charged virus-like nano-shells are
examined in ionic solutions with monovalent and multivalent ions. A theoretical
model based on a thin charged spherical shell and multivalent ions within the
"dressed multivalent ion" approximation, yielding their distribution across the
shell and the corresponding electrostatic (osmotic) pressure acting on the
shell, is compared with extensive implicit Monte-Carlo simulations. It is found
to be accurate for positive or low negative surface charge densities of the
shell and for sufficiently high (low) monovalent (multivalent) salt
concentrations. Phase diagrams involving electrostatic pressure exhibit
positive and negative values, corresponding to an outward and an inward facing
force on the shell, respectively. This provides an explanation for the high
sensitivity of viral shell stability and self-assembly of viral capsid shells
on the ionic environment.

24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph