Adhesion of Polymer Vesicles

John J. Lin, Frank S. Bates, Daniel A. Hammer, and James A. Silas

Phys. Rev. Lett. 95, 026101 – Published 6 July 2005

Abstract

The adhesion and bending modulus of polybutadiene-poly(ethylene oxide) block copolymer vesicles made from a bidisperse mixture of polymers is measured using micropipette aspiration. The adhesion energy between biotinylated vesicles and avidin beads is modeled by incorporating the extension of the adhesive ligands above the surface brush of the vesicle according to the blob model of bidisperse polymer mixtures of Komura and Safran assuming the polymer brush at the surface of the vesicle is compact. The same model accurately reproduces the scaling of the bending modulus with polymer composition.

Received 4 January 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.026101

Authors & Affiliations

John J. Lin¹, Frank S. Bates², Daniel A. Hammer³, and James A. Silas^1,*

¹Department of Chemical and Biomolecular Engineering and the Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
²Department of Chemical Engineering and Material Science, University of Minnesota, Minneapolis, Minnesota, USA
³Department of Bioengineering and the Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA

^*Current address: Department of Chemical Engineering, Texas A&M University, College Station, TX, USA.

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Issue

Vol. 95, Iss. 2 — 8 July 2005

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