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Particle scattering factor of pearl necklace chains |
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| Authors: | Ralf Schweins Klaus Huber |
| Affiliation: | 1. Universität Paderborn, Fakultät für Naturwissenschaften, Department Chemie, Warburger Str. 100, D-33098 Paderborn, Germany Institut Laue - Langevin, Large Scale Structures Group, B. P. 156, 6, rue Jules Horowitz, F-38042 Grenoble CEDEX 9, France;2. Universität Paderborn, Fakultät für Naturwissenschaften, Department Chemie, Warburger Str. 100, D-33098 Paderborn, Germany |
| Abstract: | The particle scattering behaviour of a pearl necklace chain is derived. The chain is composed of sphere-like pearls, separated by rod-like segments of fixed length, which have no angular restrictions. By calculating several series of model scattering curves, the important structural features are retrieved. The model is believed to be useful in interpreting intermediate structures of collapsing macromolecules or polyelectrolytes. A first application to a shrinking polyelectrolyte coil generated by molecular dynamic simulations (Limbach and Holm, J.Phys.Chem. 2003) is presented and used to discuss the potentials and limits of the model. |
| Keywords: | coil collapse form factor freely jointed chain pearl necklace polyelectrolyte collapse |