Abstract
Distinct lipid domains with different two-dimensional density can be visualized in monomolecular films at the air-water interface by using fluorescence microscopy, when the monolayers are doped with a low concentration of fluorescent lipid probe. The shapes of these domains are determined to a large extent by a competition between line tension and long-range electrostatic dipolar repulsions. The line tension favors compact, often circular shapes, whereas the long-range electrostatic dipolar repulsions favor other shapes, such as thin stripes. A line integral technique is described for calculating the dipolar energies of these two-dimensional domains. Calculations are given for various domain shapes and shape transitions. It is shown that as domains grow in area they tend to thin in one dimension because of long-range dipolar forces. It is also shown how these long-range dipolar forces contribute to the formation of chiral domain shapes.
| Original language | English |
|---|---|
| Pages (from-to) | 4520-4525 |
| Number of pages | 6 |
| Journal | Journal of Physical Chemistry |
| Volume | 92 |
| Issue number | 15 |
| State | Published - Dec 1 1988 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
Cite this
Shapes of finite two-dimensional lipid domains. / McConnell, Harden M.; Moy, Vincent T.
In: Journal of Physical Chemistry, Vol. 92, No. 15, 01.12.1988, p. 4520-4525.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Shapes of finite two-dimensional lipid domains
AU - McConnell, Harden M.
AU - Moy, Vincent T.
PY - 1988/12/1
Y1 - 1988/12/1
N2 - Distinct lipid domains with different two-dimensional density can be visualized in monomolecular films at the air-water interface by using fluorescence microscopy, when the monolayers are doped with a low concentration of fluorescent lipid probe. The shapes of these domains are determined to a large extent by a competition between line tension and long-range electrostatic dipolar repulsions. The line tension favors compact, often circular shapes, whereas the long-range electrostatic dipolar repulsions favor other shapes, such as thin stripes. A line integral technique is described for calculating the dipolar energies of these two-dimensional domains. Calculations are given for various domain shapes and shape transitions. It is shown that as domains grow in area they tend to thin in one dimension because of long-range dipolar forces. It is also shown how these long-range dipolar forces contribute to the formation of chiral domain shapes.
AB - Distinct lipid domains with different two-dimensional density can be visualized in monomolecular films at the air-water interface by using fluorescence microscopy, when the monolayers are doped with a low concentration of fluorescent lipid probe. The shapes of these domains are determined to a large extent by a competition between line tension and long-range electrostatic dipolar repulsions. The line tension favors compact, often circular shapes, whereas the long-range electrostatic dipolar repulsions favor other shapes, such as thin stripes. A line integral technique is described for calculating the dipolar energies of these two-dimensional domains. Calculations are given for various domain shapes and shape transitions. It is shown that as domains grow in area they tend to thin in one dimension because of long-range dipolar forces. It is also shown how these long-range dipolar forces contribute to the formation of chiral domain shapes.
UR - http://www.scopus.com/inward/record.url?scp=0000662533&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000662533&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0000662533
VL - 92
SP - 4520
EP - 4525
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
SN - 0022-3654
IS - 15
ER -