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STEPWISE CONFORMATION TRANSITIONS FOR A SEMI-STIFF RING POLYMER CONFINED IN A CONICAL TRAP INDUCED BY THE INCREASING EXTERNAL FIELD OR BY CONE’S OPENING ANGLE VARIATION

Аннотация:

In this paper a stepwise compaction process of a ring semi-stiff polymer chain placed in a 3d conical nano-cavity and being under the action of the increasing external field is studied. Compaction from a circle- like shape to several toroidal-like loops for a three-dimensional system was observed. The thermodynamic stability of these toroidal-like structures was investigated by observing a hysteresis of the compaction- extension curves. This study extends our previous work [1] with investigation of the effect of the cone opening angle variation on the distinct shape transitions. 

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