Issue |
Europhys. Lett.
Volume 55, Number 6, September II 2001
|
|
---|---|---|
Page(s) | 821 - 826 | |
Section | Condensed matter: structural, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2001-00354-1 | |
Published online | 01 December 2003 |
Influence of screw dislocations on the orientation of a sheared lamellar phase
1
European Synchrotron Radiation Facility - F-38043
Grenoble, France
2
North Carolina State University,
Physics Department Box 7518, Raleigh, NC 27695, USA
3
Centre de recherche Paul-Pascal, CNRS - Avenue du
Dr-Schweitzer
F-33600 Pessac, France
Received:
22
March
2001
Accepted:
6
July
2001
We have investigated the role of screw dislocations defects in a
lyotropic lamellar phase of the mixed DMPC//water system
using microscopy and scattering techniques. Several of the usual
shear-induced orientations of the lamellar phase were observed as
a function of temperature and shear rate. It is suggested that
the corresponding dynamical transitions are consistent with a
variation in size of the defects.
PACS: 61.30.Eb – Experimental determinations of smectic, nematic, cholesteric, and other structures / 83.10.Tv – Structural and phase changes / 83.50.-v – Deformation and flow
© EDP Sciences, 2001
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