Elastic properties of polyelectrolyte capsules studied by atomic-force microscopy and RICM
Elastic properties of polyelectrolyte capsules studied by atomic-force microscopy and RICM
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DOI：
10.1140/epje/i2003-10056-0
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发表时间：
2003-10-01
影响因子：
1.8
通讯作者：
Fery, A
中科院分区：
文献类型：
--
作者：
Dubreuil, F;Elsner, N;Fery, A
采用原子力显微镜和反射干涉相衬显微镜相结合的新方法研究了纳米多层胶囊的力学性能。通过测量聚（苯乙烯磺酸盐）/聚（烯丙基胺）胶囊的力与变形的关系，示出了取决于所施加的变形的不同变形机制的存在。本论文的重点是小变形制度。变形胶囊的弹性响应作为壁厚和胶囊尺寸的函数进行了研究，并显示了理论上预期的变化。从实验中获得的杨氏模量范围在1.3和1.9 GPa之间。
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.