title: Collapse transition of two-dimensional flexible and semiflexible polymers.
abstract: The nature of the globule-coil transition of surface-confined polymers has been an issue of debate. Here this 2D collapse transition is studied through a partially directed lattice model. In the general case of polymers with positive bending stiffness (Delta>0), the collapse transition is first order; it becomes second order only in the limiting case of zero bending stiffness (Delta triple bond 0). These analytical results are confirmed by Monte Carlo simulations. We also suggest some possible future experiments.
authors.affiliation: Institute of Theoretical Physics, The Chinese Academy of Sciences, Beijing 100080, China.
authors.forename: Haijun
authors.initials: H
authors.lastname: Zhou
authors.forename: Jie
authors.initials: J
authors.lastname: Zhou
authors.forename: Zhong-Can
authors.initials: ZC
authors.lastname: Ou-Yang
authors.forename: Sanjay
authors.initials: S
authors.lastname: Kumar
mesh_terms: D004247:DNA / Q000737:chemistry; D008956:Models, Chemical; D008968:Molecular Conformation; D011108:Polymers / Q000737:chemistry*; D011506:Proteins / Q000737:chemistry; D013816:Thermodynamics
chemical_list: D011108:Polymers; D011506:Proteins; D004247:DNA