Morphological variation in a toroid generated from a single polymer chain |
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Authors: | Takenaka Y Yoshikawa K Yoshikawa Y Koyama Y Kanbe T |
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Institution: | Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan. |
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Abstract: | A single semiflexible polymer chain folds into a toroidal object under poor solvent conditions. In this study, we examined the morphological change in such a toroidal state as a function of the cross-sectional area and stiffness of the chain together with the surface energy, which characterizes the segmental interaction parameter. Changes in the thickness and outer/inner radius on a toroid are interpreted in terms of these parameters. Our theoretical expectation corresponds to the actual morphological changes in a single giant DNA molecule as observed by electron microscopy. |
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