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Surface immobilization and mechanical properties of catanionic hollow faceted polyhedrons

Title data

Delorme, Nicolas ; Dubois, Monique ; Garnier, Sébastien ; Laschewsky, Andre ; Weinkamer, Richard ; Zemb, Thomas ; Fery, Andreas:
Surface immobilization and mechanical properties of catanionic hollow faceted polyhedrons.
In: The Journal of Physical Chemistry B. Vol. 110 (February 2006) Issue 4 . - pp. 1752-1758.
ISSN 1520-5207
DOI: https://doi.org/10.1021/jp054473

Official URL: Volltext

Abstract in another language

We report here for the first time on surface immobilization of hollow faceted polyhedrons formed from catanionic surfactant mixtures. We find that electrostatic interaction with the substrate dominates their adhesion behavior. Using polyelectrolyte coated surfaces with tailored charge densities, polyhedrons can thus be immobilized without complete spreading, which allows for further study of their mechanical properties using AFM force measurements. The elastic response of individual polyhedrons can be locally resolved, showing pronounced differences in stiffness between faces and vertexes of the structure, which makes these systems interesting as models for structurally similar colloidal scale objects such as viruses, where such effects are predicted but cannot be directly observed due to the smaller dimensions. Elastic constants of the wall material are estimated using shell and plate deformation models and are found to be a factor of 5 larger than those for neutral lipidic bilayers in the gel state. We discuss the molecular origins of this high stiffness.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry II - Univ.-Prof. Dr. Andreas Fery
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: No
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 08 Dec 2014 11:40
Last Modified: 18 Feb 2016 08:28
URI: https://eref.uni-bayreuth.de/id/eprint/4028