%0 Journal Article
%J EPL (Europhysics Letters)
%D 2011
%T Entropic force of polymers on a cone tip
%A Mohammad F. Maghrebi
%A Yacov Kantor
%A Mehran Kardar
%X 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 R_g, the only relevant length scale is the tip-plate (or tip-tip) separation h, and the entropic force is given by F=A kT/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.
%B EPL (Europhysics Letters)
%V 96
%P 66002
%8 2011/12/01
%G eng
%U http://arxiv.org/abs/1109.5658v2
%N 6
%! EPL
%R 10.1209/0295-5075/96/66002