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Polymer-induced tubulation in lipid vesicles | | F. Campelo
; A. Hernandez-Machado
; | | Date: |
21 Apr 2008 | | Abstract: | A mechanism of extraction of tubular membranes from a lipid vesicle is
presented. A concentration gradient of anchoring amphiphilic polymers generates
tubes from bud-like vesicle protrusions. We explain this mechanism in the
framework of the Canham-Helfrich model. The energy profile is analytically
calculated and a tube with a fixed length, corresponding to an energy minimum,
is obtained in a certain regime of parameters. Further, using a phase-field
model, we corroborate these results numerically. We obtain the growth of tubes
when a polymer source is added, and the bud-like shape after removal of the
polymer source, in accordance with recent experimental results. | | Source: | arXiv, 0804.3329 | | Services: | Forum | Review | PDF | Favorites | |
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