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We investigate the wrapping conformations of a strongly adsorbed polymerchain on an oppositely charged nano-sphere by employing a reduced(dimensionless) representation of a primitive chain-sphere model. This enablesus to determine the global phase behavior of the chain conformation in a widerange of values for the system parameters including the chain contour length,its linear charge density and persistence length as well as the nano-spherecharge and radius, and also the salt concentration in the bathing solution. Thephase behavior of a charged chain-sphere complex can be described in terms of afew distinct conformational symmetry classes (phases) separated by continuousor discontinuous transition lines which are determined by means ofappropriately defined (order) parameters. Our results can be applied to a wideclass of strongly coupled polymer-sphere complexes including, for instances,complexes that comprise a mechanically flexible or semiflexible polymer chainor an extremely short or long chain and, as a special case, include thepreviously studied example of DNA-histone complexes.

Global analysis of the ground-state wrapping conformation of a charged polymer on an oppositely charged nano-sphere