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Adsorption of a directed polymer subject to an elongational force

E Orlandini1, M C Tesi2 and S G Whittington3

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We consider several different directed walk models of a homopolymer adsorbing at a surface when the polymer is subject to an elongational force which hinders the adsorption. We use combinatorial methods for analyzing how the critical temperature for adsorption depends on the magnitude of the applied force and show that the crossover exponent phgr changes when a force is applied. We discuss the characteristics of the model needed to obtain a re-entrant phase diagram.


PACS

68.43.Mn Adsorption kinetics

64.70.-p Specific phase transitions

87.14.G- Nucleic acids

MSC

82D60 Polymers

92D20 Protein sequences, DNA sequences

Subjects

Surfaces, interfaces and thin films

Biological physics

Condensed matter: structural, mechanical & thermal

Dates

Issue 5 (6 February 2004)

Received 11 September 2003

Published 19 January 2004



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