Interface Relaxation in Electrophoretic Deposition of Polymer Chains: Effects of Segmental Dynamics, Molecular Weight, and Field
Physics and Astronomy
Using different segmental dynamics and relaxation, characteristics of the interface growth is examined in an electrophoretic deposition of polymer chains on a three (2+1)-dimensional discrete lattice with a Monte Carlo simulation. Incorporation of faster modes such as crankshaft and reptation movements along with the relatively slow kink-jump dynamics seems crucial in relaxing the interface width. As the continuously released polymer chains are driven (via segmental movements) and deposited, the interface width W grows with the number of time steps t, Wproportional tot(beta), (betasimilar to0.4-0.8), which is followed by its saturation to a steady-state value W(s). Stopping the release of additional chains after saturation while continuing the segmental movements relaxes the saturated width to an equilibrium value (W(s)-->W(r)). Scaling of the relaxed interface width W(r) with the driving field E, W(r)proportional toE(-1/2) remains similar to that of the steady-state W(s) width. In contrast to monotonic increase of the steady-state width W(s), the relaxed interface width W(r) is found to decay (possibly as a stretched exponential) with the molecular weight.
Physical Review E
Bentrem, F. W.,
Pandey, R. B.
(2002). Interface Relaxation in Electrophoretic Deposition of Polymer Chains: Effects of Segmental Dynamics, Molecular Weight, and Field. Physical Review E, 65(4).
Available at: http://aquila.usm.edu/fac_pubs/3645