The adsorption of polyethylene with various chain-lengths on a silicon (111) surface was studied. The chains all took up two-dimensional adsorption configurations on the surface. The adsorption energy of various chain lengths was described by a linear function, and the average adsorption energy per segment was -1.58 kcal/mol. The diffusion coefficient of the chains scaled with the degree of polymerization (N) as N-3/2.

Adsorption and Diffusion Processes of Polyethylene on Silicon (111) Surface Studied by Molecular Dynamics Simulation. Mu, D., Zhou, Y.H.: Journal of Theoretical and Computational Chemistry, 2011, 10[4], 411-21