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The self-assembly of Janus ring polymers is studied via a coarse-grained molecular dynamics employing a bead spring model including bending rigidity contributions to the Hamiltonian. We examine the formation and the morphology of amphiphilicity-driven clusters in the system using the number density  ρ   N  , the temperature  T , the fraction of solvophobic monomers  α , and the stiffness of the polymer rings  κ  as control parameters. We present a quantitative analysis of several characteristics for the formed clusters of Janus rings. Measured quantities include the distribution of the cluster size  M   C   and the shape of the clusters in the form of the prolate/oblate factor  Q  and shape factors  sf . We demonstrate Janus rings form polymorphic micelles that vary from a spherical shape, akin to that known for linear block copolymers, to a novel type of toroidal shape, and we highlight the role played by the key physical parameters leading to the stabilization of such structures.

Aggregation shapes of amphiphilic ring polymers: from spherical to toroidal micelles