Physics and Astronomy
Mathematics and Natural Sciences
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, W∝tβ, (β ~0.4-0.8), which is followed by its saturation to a steady-state value Ws. Stopping the release of additional chains after saturation while continuing the segmental movements relaxes the saturated width to an equilibrium value (Ws → Wr). Scaling of the relaxed interface width Wr with the driving field E, Wr∝E-1/2 remains similar to that of the steady-state Ws width. In contrast to monotonic increase of the steady-state width Ws, the relaxed interface width Wr 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: https://aquila.usm.edu/fac_pubs/3645