Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2011-04-27
Phys. Rev. E 83, 050801(R) (2011)
Physics
Condensed Matter
Soft Condensed Matter
Scientific paper
10.1103/PhysRevE.83.050801
Free energy barrier for entry of a charged polymer into a nanoscale channel by a driving electric field is studied theoretically and using molecular dynamics simulations. Dependence of the barrier height on the polymer length, the driving field strength, and the channel entrance geometry is investigated. Squeezing effect of the electric field on the polymer before its entry to the channel is taken into account. It is shown that lateral confinement of the polymer prior to its entry changes the polymer length dependence of the barrier height noticeably. Our theory and simulation results are in good agreement and reasonably describe related experimental data.
Fazli Hossein
Nikoofard Narges
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