Condensed states of a semiflexible copolymer in poor solvent: Figures of   eight and discrete size torii
  We examine the condensed states of a simple semiflexible copolymer in which there are two monomer types that are immiscible with each other and with the solvent. Although this is similar to the well known problem of collapse for a semiflexible homopolymer we find that it gives rise to a much richer variety of condensed states. We predict the existence of these states using simple analytic arguments and also observe them directly using Brownian dynamics simulations. 
E. Hernandez-Zapata, I. R. Cooke, D. R. M. Williams