Shape change of nanocontainers via a reversible ionic buckling

Rastko Sknepnek, Graziano Vernizzi, Monica Olvera De La Cruz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

We demonstrate that small charged nanocages can undergo reversible changes of shapes by modifying the ionic conditions including salt concentration, pH, and dielectric permittivity of the medium. Using numerical simulations, we analyze structures with various charge stoichiometric ratios. At zero or low charge densities, the shape of the cage is determined by its elastic properties, and the surface charge pattern is dictated by the globally fixed geometry. As the charge density per molecule increases, the shape is strongly affected by the electrostatic forces. In this regime, the shape of the nanocage is controlled by the charge distribution.

Original languageEnglish (US)
Article number215504
JournalPhysical review letters
Volume106
Issue number21
DOIs
StatePublished - May 25 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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