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Density and conformation with relaxed substrate, bulk, and interface electrophoretic deposition of polymer chains | | Frank W. Bentrem
; Jun Xie
; R.B. Pandey
; | | Date: |
31 May 2006 | | Journal: | Journal of Molecular Structure (Theochem) 592 (2002) 95-103 | | Subject: | Soft Condensed Matter; Materials Science | | Abstract: | 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, $d_s propto t^{gamma}$ with a field dependent nonuniversal exponent $gamma = 0.23 + 0.7 E$. The bulk volume fraction $d_b$ and the substrate polymer density ($d_s$) increases exponentially with the field ($d_b propto E^{0.4}$, $d_s propto E^{0.2}$) 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, $d_b propto L_c^{-0.11}$. The radius of gyration remains Gaussian in all density regions. | | Source: | arXiv, cond-mat/0606008 | | Services: | Forum | Review | PDF | Favorites | |
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