Electrostatic repulsion of positively charged vesicles and negatively charged objects

by: H Aranda-Espinoza, Y Chen, N Dan, TC Lubensky, P Nelson, L Ramos, DA Weitz

Science, Vol. 285, No. 5426. (16 July 1999), pp. 394-397.

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Abstract

A positively charged, mixed bilayer vesicle in the presence of negatively charged surfaces (for example, colloidal particles) can spontaneously partition into an adhesion zone of definite area and another zone that repels additional negative objects. Although the membrane itself has nonnegative charge in the repulsive zone, negative counterions on the interior of the vesicle spontaneously aggregate there and present a net negative charge to the exterior. Beyond the fundamental result that oppositely charged objects can repel, this mechanism helps to explain recent experiments on surfactant vesicles.

@article{citeulike:1531307, abstract = {A positively charged, mixed bilayer vesicle in the presence of negatively charged surfaces (for example, colloidal particles) can spontaneously partition into an adhesion zone of definite area and another zone that repels additional negative objects. Although the membrane itself has nonnegative charge in the repulsive zone, negative counterions on the interior of the vesicle spontaneously aggregate there and present a net negative charge to the exterior. Beyond the fundamental result that oppositely charged objects can repel, this mechanism helps to explain recent experiments on surfactant vesicles.}, address = {Department of Chemical Engineering, University of Delaware, Newark, DE 19716, USA. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104 USA. Groupe de Dynamique des Phases Condensees, Case 26, Universite de Mo.}, author = {Aranda-Espinoza, H. and Chen, Y. and Dan, N. and Lubensky, T. C. and Nelson, P. and Ramos, L. and Weitz, D. A. }, citeulike-article-id = {1531307}, issn = {1095-9203}, journal = {Science}, keywords = {charge, electrostatic, layers, negative, positive, repulsion, vesicles}, month = {July}, number = {5426}, pages = {394--397}, posted-at = {2007-08-02 22:21:18}, priority = {2}, title = {Electrostatic repulsion of positively charged vesicles and negatively charged objects }, url = {http://view.ncbi.nlm.nih.gov/pubmed/10411499}, volume = {285}, year = {1999} }

RIS record

TY - JOUR ID - citeulike:1531307 L3 - citeulike-article-id:1531307 TI - Electrostatic repulsion of positively charged vesicles and negatively charged objects JF - Science VL - 285 IS - 5426 SP - 394 EP - 397 AD - Department of Chemical Engineering, University of Delaware, Newark, DE 19716, USA. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104 USA. Groupe de Dynamique des Phases Condensees, Case 26, Universite de Mo. SN - 1095-9203 N2 - A positively charged, mixed bilayer vesicle in the presence of negatively charged surfaces (for example, colloidal particles) can spontaneously partition into an adhesion zone of definite area and another zone that repels additional negative objects. Although the membrane itself has nonnegative charge in the repulsive zone, negative counterions on the interior of the vesicle spontaneously aggregate there and present a net negative charge to the exterior. Beyond the fundamental result that oppositely charged objects can repel, this mechanism helps to explain recent experiments on surfactant vesicles. KW - charge KW - electrostatic KW - layers KW - negative KW - positive KW - repulsion KW - vesicles AU - Aranda-Espinoza, H AU - Chen, Y AU - Dan, N AU - Lubensky, TC AU - Nelson, P AU - Ramos, L AU - Weitz, DA PY - 1999/07/16/ UR - http://view.ncbi.nlm.nih.gov/pubmed/10411499 ER -

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