Wrapping of a spherical colloid by a fluid membrane

Details Wrapping of a spherical colloid by a fluid membrane Wrapping of a spherical colloid by a fluid membrane

2002-12-17

arxiv.org/abs/cond-mat/0212421v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 5 figures, RevTeX style

Scientific paper

10.1209/epl/i2003-00438-4

We theoretically study the elastic deformation of a fluid membrane induced by an adhering spherical colloidal particle within the framework of a Helfrich energy. Based on a full optimization of the membrane shape we find a continuous binding and a discontinuous envelopment transition, the latter displaying a potentially substantial energy barrier. A small gradient approximation permits membrane shape and complex energy to be calculated analytically. While this only leads to a good representation of the complex geometry for very small degrees of wrapping, it still gives the correct phase boundaries in the regime of low tension.

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