Adsorption of a semiflexible wormlike chainA.N. Semenov
Institut Charles Sadron, 6 rue Boussingault, 67083 Strasbourg Cedex, France email@example.com
(Received 10 October 2002 and Received in final form 22 November 2002 / Published online: 21 January 2003)
Adsorption of ideal polymers with stiff backbone onto a flat surface is considered theoretically. Both scaling approach and quantitative theory are developed. We predict a self-similar monomer concentration profile near the surface (when the distance to the surface x is much smaller than the chain persistence length l/2). The typical conformation of a weakly adsorbed chain can be viewed as a sequence of alternating flat (2-dimensional) trains of wormlike short loops (flat blobs) and coil-like (3-dimensional) loops forming a triple-layer structure: contact layer ) of adsorbed fragments virtually laid on the surface, proximal layer ) of flat blobs, and more dilute distal corona layer (x>l). Here defines the range of monomer/surface attraction, . The adsorption transition is continuous. However, its relative width is small (T* is the adsorption temperature, is the relevant temperature interval): , i.e. a discontinuous transition in the limit .
61.25.Hq - Macromolecular and polymer solutions; polymer melts; swelling.
67.70.+n - Films (including physical adsorption).
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2002