COLL 523 |
| Helmuth Moehwald Sr., Interfaces, Max-Planck-Institute of Colloids and Interfaces, Campus Golm, Potsdam, 14424, Germany, Gleb B. Sukhorukov, Max Planck Institute of Colloids and Interfaces, Capsulution NanoScience AG, Golm/Potsdam, 14424, Germany, C. J. Gao, College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou, 310027, China, and A Fery, Department of Interfaces, MPI f. Kolloide und Grenzflächen, Am Mühlenberg, Golm, D14476, Germany. |
| Advances in the preparation and characterization of polyelectrolyte multilayer films have recently been used to fabricate hollow capsules with the same definition of the walls and the variability of constituent materials from synthetic and natural polyelectrolytes to proteins and inorganic particles. This enables the preparation of functional colloids with designed properties. In this contribution we will concentrate on control of the following features. - The permeability of macromolecules can be reversibly switched via pH, ionic strength, solvent addition and changed also via light and temperature. - Functional catalysts like enzymes can be encapsulated quantitatively and then act without disturbance by inhibitors in a specifically optimised local environment. - Chemical and physical processes inside the capsules like synthesis of polymers, dyes and polynucleic acids and precipitation of organic and inorganic particles can be selectively achieved. - Adhesion and mechanics can be studied by variants of surface force microscopy, and this demonstrates the large variability in elastic properties achievable. |
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Symposium in Memory of Arthur W. Adamson
8:30 AM-11:10 AM, Tuesday, March 30, 2004 Marriott -- Orange County 4, Oral
Division of Colloid and Surface Chemistry |