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          Institute: MPI für Polymerforschung     Collection: MPI Polymerforschung     Display Documents



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ID: 28343.0, MPI für Polymerforschung / MPI Polymerforschung
Collapse dynamics of a polymer chain: Theory and simulation
Authors:Abrams, C. F.; Lee, N. K.; Obukhov, S. P.
Language:English
Date of Publication (YYYY-MM-DD):2002-08
Title of Journal:Europhysics Letters
Journal Abbrev.:Europhys. Lett.
Volume:59
Issue / Number:3
Start Page:391
End Page:397
Review Status:No review
Audience:Not Specified
Abstract / Description:We present a scaling theory describing the collapse of a homopolymer chain in poor solvent. At time t after the beginning of the collapse, the original Gaussian chain of length N is streamlined to form N/g segments of length R (t), each containing g similar to t monomers. These segments are statistical quantities representing cylinders of length Rsimilar tot(1/2) and diameter d similar to t(1/4), but structured out of stretched arrays of spherical globules. This prescription incorporates the capillary instability. We compare the time-dependent structure factor derived for our theory with that obtained from ultra-large-scale molecular-dynamics simulation with explicit solvent. This is the first time such a detailed comparison of theoretical and simulation predictions of collapsing chain structure has been attempted. The favorable agreement between the theoretical and computed structure factors supports the picture of the coarse-graining process during polymer collapse.
Comment of the Author/Creator:Date: 2002, AUG
External Publication Status:published
Document Type:Article
Affiliations:MPI für Polymerforschung
External Affiliations:Univ Florida, Dept Phys, Gainesville, FL 32611 USA
Identifiers:ISI:000177304600012 [ID No:1]
ISSN:0295-5075 [ID No:2]
LOCALID:P-02-107
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