| Issue |
Europhys. Lett.
Volume 51, Number 1, July I 2000
|
|
|---|---|---|
| Page(s) | 41 - 47 | |
| Section | Atomic and molecular physics | |
| DOI | https://doi.org/10.1209/epl/i2000-00335-x | |
| Published online | 01 September 2002 | |
A polymer chain trapped between athermal walls: Concentration profile and confinement force
1
Department of Chemical Engineering, University of Florida
Gainesville, FL 32611-6005, USA
2
Foundation for Research & Technology-Hellas, Institute of
Electronic Structure & Laser
P.O. Box 1527, Heraklion 711 10, Crete, Greece
Received:
17
January
2000
Accepted:
16
May
2000
We analyze the model problem of a single polymer chain in good solvent
confined between athermal walls. Concentration profiles and forces are
obtained by Monte Carlo simulations as the distance between the walls is
decreased (and the solvent is allowed to drain from the system). The scaling
of these quantities with chain length and wall separation, and the
proportionality constant between surface concentration and force are in good
agreement with recent theoretical predictions. The force and concentration
exponents we find are modestly (
) lower than previously
predicted. This difference probably originates from the chain length not
being sufficiently near the asymptotic limit.
It could also indicate the need for carrying out the 
-expansion to higher order.
PACS: 36.20.-r – Macromolecules and polymer molecules / 36.20.Ey – Conformation (statistics and dynamics) / 02.70.Lq – Monte Carlo and statistical methods
© EDP Sciences, 2000
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