Density and Conformation with Relaxed Substrate, Bulk, and Interface in Electrophoretic Deposition of Polymer Chains
Physics and Astronomy
Characteristics of relaxed density profile and conformation of polymer chains are studied by a Monte Carlo simulation on a discrete lattice in three dimensions using different segmental (kink-jump (K), crank-shaft (C), reptation (R)) dynamics. Three distinct density regimes, substrate, bulk, and interface, are identified. With the KC segmental dynamics, we find that the substrate coverage grows with a power law, d(s) proportional to t(gamma) with a field (E) dependent non-universal exponent gamma = 0.23 + 0.7E. The bulk volume fraction d(b) and the substrate polymer density (d(s)) increases with the field with power-laws (d(b) proportional to E-0.4, d(s) proportional to E-0.2) in the low field regime. The interface polymer density d(f) increases with the molecular weight. With the KCR segmental dynamics, bulk and substrate density decreases linearly with the temperature at high temperatures. The bulk volume fraction is found to decay with the molecular weight, d(b) proportional to L-c(-0.11). The radius of gyration remains Gaussian in all density regions. (C) 2002 Elsevier Science B.V. All rights reserved.
Journal of Molecular Structure: THEOCHEM
Pandey, R. B.
(2002). Density and Conformation with Relaxed Substrate, Bulk, and Interface in Electrophoretic Deposition of Polymer Chains. Journal of Molecular Structure: THEOCHEM, 592, 95-103.
Available at: http://aquila.usm.edu/fac_pubs/3496