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Dubreuil, Frederic ; Elsner, Nils ; Fery, Andreas:
Elastic properties of polyelectrolyte capsules studied by atomic-force microscopy and RICM.
In: The European Physical Journal E.
Bd. 12
(2003)
Heft 2
.
- S. 215-221.
ISSN 1292-895X
DOI: https://doi.org/10.1140/epje/i2003-10056-0
Abstract
Mechanical properties of polyelectrolyte multilayer capsules were studied using a new method combining atomic-force microscopy and reflection interference contrast microscopy. By measuring the force vs. deformation for poly(styrene sulfonate)/poly(allylamine) capsules the existence of different deforma- tion regimes depending on the applied deformation was shown. The present paper focuses on the small- deformation regime. The elastic response of the deformed capsule was studied as a function of the wall thickness and the capsule size, and showed the theoretically expected variations. The Young modulus obtained from the experiments ranges between 1.3 and 1.9 GPa.