Comparative Study
doi: 10.1140/epje/i2003-10056-0.
Elastic properties of polyelectrolyte capsules studied by atomic-force microscopy and RICM
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- PMID: 15007658
- DOI: 10.1140/epje/i2003-10056-0
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Comparative Study
Elastic properties of polyelectrolyte capsules studied by atomic-force microscopy and RICM
Eur Phys J E Soft Matter.
2003 Oct.
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 deformation 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.
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