Issue |
Europhys. Lett.
Volume 47, Number 6, September II 1999
|
|
---|---|---|
Page(s) | 675 - 680 | |
Section | Atomic and molecular physics | |
DOI | https://doi.org/10.1209/epl/i1999-00442-2 | |
Published online | 01 September 2002 |
Escape transition of a compressed polymer mushroom under good solvent conditions
1
Institut für Physik, Johannes-Gutenberg-Universität Staudinger Weg 7, D-55099 Mainz, Germany
2
Institute for Physical Chemistry, Bulgarian Academy of Sciences - 1113, Sofia, Bulgaria
3
Max-Planck-Institut für Polymerforshung Ackermannweg 10, D-55128, Mainz, Germany
Received:
5
February
1999
Accepted:
12
July
1999
The escape transition of a flexible polymer chain of chain length N,
endgrafted at a hard wall and compressed by a piston of radius R, is
studied by Monte Carlo simulation and by phenomenological arguments. In
contrast to previous theories which have considered the transition as a
function of a (fixed) height H of the piston above the wall, we consider
the transition as a function of the conjugate variable, the force f acting
on the piston. We find that the transition (which is sharp only for ) is characterized by a flat region of f in the f
vs.
H isotherm, i.e. a jump in the height occurs at the transition from
to
, with
.
PACS: 36.20.-r – Macromolecules and polymer molecules / 36.20Ey – Conformation (statistics and dynamics) / 82.45.+z – Electrochemistry and electrophoresis
© EDP Sciences, 1999
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