title: Semiflexible polymer condensates in poor solvents: toroid versus spherical geometries.
abstract: Semiflexible polymers, such as DNA, in the presence of a condensing agent often form toroids. This is due to a balance between bending and surface area free energy penalties. Here we show why in experiments all the toroids have been found to have similar physical size. We also introduce a novel morphology, that of the hollow sphere, which is favored for long polymer chains. This offers the possibility of encapsulating material inside a "vesicle" made of semiflexible polymers. We also consider the case of many such polymer chains placed in a poor solvent. We show a transition between two morphologies occur on increasing concentration of polymer chains, from a thickened toroid to a spherical globule.
authors.affiliation: Research School of Physical Sciences and Engineering, Australian National University, Canberra.
authors.forename: I C B
authors.initials: IC
authors.lastname: Miller
authors.forename: M
authors.initials: M
authors.lastname: Keentok
authors.forename: G G
authors.initials: GG
authors.lastname: Pereira
authors.forename: D R M
authors.initials: DR
authors.lastname: Williams