EFFECTS OF SINUSOIDAL ELECTROPHORETIC FIELD ON CHAIN MACROMOLECULES IN A HETEROGENEOUS MEDIUM: STRUCTURE AND DYNAMICS BY A HYBRID COMPUTER SIMULATION

Grace M. Foo () and R. B. Pandey ()
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Grace M. Foo: Supercomputing and Visualization Unit, National University of Singapore, Singapore 119260, Singapore
R. B. Pandey: Department of Physics and Astronomy, University of Southern Mississippi, Hattiesburg, MS 39406-5046, USA

International Journal of Modern Physics C (IJMPC), 2002, vol. 13, issue 05, 625-638

Abstract: Using a hybrid simulation method, structural and dynamic response properties of chain macromolecules are studied in a heterogeneous gel matrix in presence of an electrophoretic fieldE(t) = Eb+ Essin(2π ft), whereEbis the static field andEsis the amplitude of sinusoidal field of frequencyf. We find that the oscillating field enhances the macromolecular mobility atEs> Ebwhile it becomes ineffective atEs Ebleads to interesting effects such as (i) a significant decrease in molecular clustering, (ii) reduced radius of gyration, and (iii) its linear response toEb. Power law behavior of molecular motion, i.e., the variation rms displacement(R)with the time steps(t),R ∝ tν, is sensitive to temperature, molecular weight, and field.

Keywords: Electrophoresis; polymer; simulation; transport; conformation (search for similar items in EconPapers)
Date: 2002
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DOI: 10.1142/S0129183102003401

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