Late stages of the "pearling" instability in lipid bilayers

J. L. Goveas, Scott Thomas Milner, W. B. Rüssel

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Abstract. -Applying laser tweezers to cylindrical vesicles of lipid bilayers produces an instability which propagates down the vesicle leaving behind it a peristaltic state, which appears under the microscope as pearls on a string. We investigate the late stages of this "pearling" instability, where the pearls are observed to drift slowly towards the laser trap (the spot at which the tweezers are applied, into which the surfactant is drawn) where they jam up. We model the hydrodynamics of the drifting pearls as a combination of translation of the string of pearls, and "slipping" of the bilayer skin over the pearls, to relate the speed of the pearls to the underlying flux of surfactant into the trap. We find that the pearl drift is slower than the skin-slip speed by a factor of order a/R where a is the radius of the tethers connecting the pearls, and R is the pearl radius.

Original languageEnglish (US)
Pages (from-to)1185-1204
Number of pages20
JournalJournal de Physique I
Volume7
Issue number9
StatePublished - Dec 1 1997

Fingerprint

Lipid bilayers
lipids
Skin
Surface active agents
strings
surfactants
traps
radii
Lasers
lasers
Microscopes
slip
Hydrodynamics
hydrodynamics
microscopes
Fluxes

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Engineering(all)

Cite this

Goveas, J. L. ; Milner, Scott Thomas ; Rüssel, W. B. / Late stages of the "pearling" instability in lipid bilayers. In: Journal de Physique I. 1997 ; Vol. 7, No. 9. pp. 1185-1204.
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Goveas, JL, Milner, ST & Rüssel, WB 1997, 'Late stages of the "pearling" instability in lipid bilayers', Journal de Physique I, vol. 7, no. 9, pp. 1185-1204.

Late stages of the "pearling" instability in lipid bilayers. / Goveas, J. L.; Milner, Scott Thomas; Rüssel, W. B.

In: Journal de Physique I, Vol. 7, No. 9, 01.12.1997, p. 1185-1204.

Research output: Contribution to journalArticle

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T1 - Late stages of the "pearling" instability in lipid bilayers

AU - Goveas, J. L.

AU - Milner, Scott Thomas

AU - Rüssel, W. B.

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N2 - Abstract. -Applying laser tweezers to cylindrical vesicles of lipid bilayers produces an instability which propagates down the vesicle leaving behind it a peristaltic state, which appears under the microscope as pearls on a string. We investigate the late stages of this "pearling" instability, where the pearls are observed to drift slowly towards the laser trap (the spot at which the tweezers are applied, into which the surfactant is drawn) where they jam up. We model the hydrodynamics of the drifting pearls as a combination of translation of the string of pearls, and "slipping" of the bilayer skin over the pearls, to relate the speed of the pearls to the underlying flux of surfactant into the trap. We find that the pearl drift is slower than the skin-slip speed by a factor of order a/R where a is the radius of the tethers connecting the pearls, and R is the pearl radius.

AB - Abstract. -Applying laser tweezers to cylindrical vesicles of lipid bilayers produces an instability which propagates down the vesicle leaving behind it a peristaltic state, which appears under the microscope as pearls on a string. We investigate the late stages of this "pearling" instability, where the pearls are observed to drift slowly towards the laser trap (the spot at which the tweezers are applied, into which the surfactant is drawn) where they jam up. We model the hydrodynamics of the drifting pearls as a combination of translation of the string of pearls, and "slipping" of the bilayer skin over the pearls, to relate the speed of the pearls to the underlying flux of surfactant into the trap. We find that the pearl drift is slower than the skin-slip speed by a factor of order a/R where a is the radius of the tethers connecting the pearls, and R is the pearl radius.

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