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Title: Mesoscale studies of ionic closed membranes with polyhedral geometries

Large crystalline molecular shells buckle spontaneously into icosahedra while multicomponent shells buckle into various polyhedra. Continuum elastic theory explains the buckling of closed shells with one elastic component into icosahedra. A generalized elastic model, on the other hand, describes the spontaneous buckling of inhomogeneous shells into regular and irregular polyhedra. By coassembling water-insoluble anionic (–1) amphiphiles with cationic (3+) amphiphiles, we realized ionic vesicles. Results revealed that surface crystalline domains and the unusual shell shapes observed arise from the competition of ionic correlations with charge-regulation. We explain here the mechanism by which these ionic membranes generate a mechanically heterogeneous vesicle.
Authors:
ORCiD logo [1]
  1. Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA, Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA, and Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
Publication Date:
OSTI Identifier:
1256536
Grant/Contract Number:
FG02-08ER46539
Type:
Published Article
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 4; Journal Issue: 6; Journal ID: ISSN 2166-532X
Publisher:
American Institute of Physics (AIP)
Research Org:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; vesicles; crystal structure; buckling; elastic moduli; dissociation