Elastic properties of polyelectrolyte capsules studied by atomic-force microscopy and RICM |
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Authors: | F?Dubreuil N?Elsner Email author" target="_blank">A?FeryEmail author |
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Institution: | (1) Max Planck Institute for Colloid and Interface Research, 14424 Potsdam, Germany |
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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.Received: 5 August 2003, Published online: 28 October 2003PACS:
46.25.-y Static elasticity - 46.70.De Beams, plates and shells - 82.35.Rs Polyelectrolytes |
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