Volume 42, Number 2, April II 1998
|Page(s)||233 - 238|
|Section||Cross-disciplinary physics and related areas of science and technology|
|Published online||01 September 2002|
Long-range elastic forces between membrane inclusions in spherical vesicles
Laboratoire de Physico-Chimie Théorique,
Ecole Supérieure de Physique et de Chimie Industrielles de la Ville de
Paris, 10 rue Vauquelin, F-75231 Paris Cédex 05, France
2 Dipartimento di Fisica del Politecnico di Torino Istituto Nazionale di Fisica della Materia, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
Corresponding author: email@example.com
Accepted: 19 February 1998
We compute the elastic interaction between two identical conical inclusions in a spherical vesicle. We find it always repulsive and proportional to the square of the contact angle. At small angular separations it decays as , as in the case of planar membranes. After a crossover , where ψ is the inclusions' aperture, it decays as , yielding a much stronger force than in a flat membrane. Finally, a quadratic minimum around the anti-polar configuration is reached.
PACS: 87.22.Bt – Membrane and subcellular physics and structure / 34.20.-b – Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions
© EDP Sciences, 1998
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