Entropic force of polymers on a cone tip
Author(s)Faghfoor Maghrebi, Mohammad; Kantor, Yacov; Kardar, Mehran
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We consider polymers attached to the tip of a cone, and the resulting force due to entropy loss on approaching a plate (or another cone). At separations shorter than the polymer radius of gyration Rg, the only relevant length scale is the tip-plate (or tip-tip) separation h, and the entropic force is given by F=Ak[subscript B]T/h. The universal amplitude A can be related to (geometry dependent) correlation exponents of long polymers. We compute A for phantom polymers, and for self-avoiding (including star) polymers by epsilon-expansion, as well as by numerical simulations in 3 dimensions.
DepartmentMassachusetts Institute of Technology. Department of Physics
Maghrebi, Mohammad F., Yacov Kantor, and Mehran Kardar. “Entropic Force of Polymers on a Cone Tip.” EPL (Europhysics Letters) 96.6 (2011): 66002.
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