Amorphous freezing in two dimensions: From soft coils to rigid particles |
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| Authors: | A Maestro D Langevin and F Monroy |
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| Institution: | 1.Departamento de Química Física I,Universidad Complutense, Ciudad Universitaria s/n,Madrid,Spain;2.Laboratoire de Physique des Solides,Université Paris-Sud XI,Orsay,France |
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| Abstract: | The topic of the gel transition in two dimensions is revisited by considering data on the shear elasticity of Langmuir monolayers
of different spherical objects. Amorphous freezing can be associated to structural percolation in a lattice able to resist
shear stresses. The shear modulus and its dependence on the packing fraction are found to strongly depend on the details of
the interaction potential and largely differ from expectations for entropic networks. This behaviour can be interpreted in
terms of more elaborated percolation theories including central forces and bond-bending forces. |
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