Role of disclinations in determining the morphology of deformable fluid interfaces

N. Ramakrishnan, J. H. Ipsen, P. B. S. Kumar

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We study the equilibrium shapes of vesicles, with an in-plane nematic order, using a Monte-Carlo scheme and show that highly curved shapes, like tubes and discs, with a striking similarity to the structures engendered by certain curvature sensing peripheral membrane proteins, can be spontaneously generated by anisotropic directional curvature with nematic disclinations playing an important role. We show that the coupling between nematic order and local curvature could lead to like defects moving towards each other and unlike defects moving away, in turn leading to tube formation. Thermally induced defect pair production lead to branched tubular structures. It is also shown that a helical arrangement of the membrane tubes, with nematic field spiraling around it, is the dominant soft mode of the system.
OriginalsprogEngelsk
TidsskriftSoft Matter
Vol/bind8
Udgave nummer11
Sider (fra-til)3058-3061
Antal sider4
ISSN1744-683X
DOI
StatusUdgivet - 2012

Citer dette

Ramakrishnan, N. ; Ipsen, J. H. ; Kumar, P. B. S. / Role of disclinations in determining the morphology of deformable fluid interfaces. I: Soft Matter. 2012 ; Bind 8, Nr. 11. s. 3058-3061.
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Role of disclinations in determining the morphology of deformable fluid interfaces. / Ramakrishnan, N.; Ipsen, J. H.; Kumar, P. B. S.

I: Soft Matter, Bind 8, Nr. 11, 2012, s. 3058-3061.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Role of disclinations in determining the morphology of deformable fluid interfaces

AU - Ramakrishnan, N.

AU - Ipsen, J. H.

AU - Kumar, P. B. S.

PY - 2012

Y1 - 2012

N2 - We study the equilibrium shapes of vesicles, with an in-plane nematic order, using a Monte-Carlo scheme and show that highly curved shapes, like tubes and discs, with a striking similarity to the structures engendered by certain curvature sensing peripheral membrane proteins, can be spontaneously generated by anisotropic directional curvature with nematic disclinations playing an important role. We show that the coupling between nematic order and local curvature could lead to like defects moving towards each other and unlike defects moving away, in turn leading to tube formation. Thermally induced defect pair production lead to branched tubular structures. It is also shown that a helical arrangement of the membrane tubes, with nematic field spiraling around it, is the dominant soft mode of the system.

AB - We study the equilibrium shapes of vesicles, with an in-plane nematic order, using a Monte-Carlo scheme and show that highly curved shapes, like tubes and discs, with a striking similarity to the structures engendered by certain curvature sensing peripheral membrane proteins, can be spontaneously generated by anisotropic directional curvature with nematic disclinations playing an important role. We show that the coupling between nematic order and local curvature could lead to like defects moving towards each other and unlike defects moving away, in turn leading to tube formation. Thermally induced defect pair production lead to branched tubular structures. It is also shown that a helical arrangement of the membrane tubes, with nematic field spiraling around it, is the dominant soft mode of the system.

U2 - 10.1039/c2sm07384f

DO - 10.1039/c2sm07384f

M3 - Journal article

VL - 8

SP - 3058

EP - 3061

JO - Soft Matter

JF - Soft Matter

SN - 1744-683X

IS - 11

ER -