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- W3165902529 abstract "The influence of distance dependent excluded volume interactions (EVIs) on the conformational properties of ring polymers is investigated within the principles of Rouse–Zimm theory. This study characterizes the structural features, i.e., the mean square radius of gyration, static structure factor, scattering intensity, fractal dimensions, and the mean square intermonomer distances of ring polymers in dilute solutions. The excluded volume interactions between the nonbonded monomers are modeled by a harmonic potential, where the strength of these interactions is evaluated from Flory’s mean-field approach. The mean square radius of gyration of the rings with EVI follows a similar scaling relation as its linear analog with the degree of polymerization. Unlike linear polymers, the maximum in the Kratky plot of the static structure factor is observed as a result of an increased segment density due to the circularity constraint. EVI marks a structural transition from relatively compact conformation for the smaller rings to expanded conformations for larger ones. The fractal dimension of the rings with EVI lies between those of the random walk and the self-avoiding walk models of linear polymers in three dimensions. This theoretical model produces a relatively pronounced effect of EVI for larger rings. An understanding of the influence of EVI on conformations of the ring polymers at a single molecule level may be applied to various naturally existing cyclic biomolecules such as plasmids, cyclic proteins, and polysaccharides." @default.
- W3165902529 created "2021-06-22" @default.
- W3165902529 creator A5012583669 @default.
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- W3165902529 date "2021-06-03" @default.
- W3165902529 modified "2023-09-23" @default.
- W3165902529 title "Conformations of ring polymers with excluded volume interactions" @default.
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- W3165902529 doi "https://doi.org/10.1122/8.0000254" @default.
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