Sat, 19 Jul 2008 02:58:44 BST CiteULike: dchen's library [874 articles] http://www.citeulike.org/user/dchen/article/2552968 CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2552968 <i>Physical Review Letters, Vol. 99, No. 6. (2007)</i><br /><br />Comprehensive three-dimensional dissipative particle dynamics simulations are carried out to elucidate the diffusion mechanism of a strongly adsorbed polymer chain on a solid surface in dilute solutions. We find Rouse and reptation dynamics for polymer chain diffusing on smooth and rough surfaces (with obstacles or sticking points), respectively. Combining with scaling analysis, we find that the interactions between the surface and the fluid screen the hydrodynamic interaction. The different scaling as found for a polymer chain diffusing on a fluid membrane [Phys. Rev. Lett. 82, 1911 (1999)] and on a solid surface [Nature (London) 406, 146 (2000)] may be explained by the solid surface inhomogeneity that induces reptation. Surface Diffusion Dynamics of a Single Polymer Chain in Dilute Solution Hu Qian Li Chen Zhong Lu Ze Li doi:10.1103/PhysRevLett.99.068301 Physical Review Letters, Vol. 99, No. 6. (2007) 2008-03-18T21:08:38-00:00 2007 Physical Review Letters 99 6 APS 2007 diffusion people polymer surface