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Butterfly patterns in a sheared lamellar-system

Abstract

A technologically important extension of `classical` scattering techniques is to investigate soft-matter systems under non-equilibrium conditions. Shear flow is known to have a profound influence on the structure and orientation of complex fluids like thermotropic or lyotropic liquid-crystals, colloidal and polymeric solutions. There is a fundamental interest in understanding the microscopic structure and dynamics of such complex fluids as the macroscopic material properties might change with the application of an external perturbation like shear. The following example illustrates a recent study of the influence of shear on the structure of a lyotropic lamellar phase. Results using a cone-and-plate and the ILL Couette type shear-cell were obtained by rheo-small-angle light scattering (rheo-SALS) and small-angle neutron scattering (SANS) at D11. Because of the broad range of momentum transfer Q available at D11 a characteristic butterfly-pattern with a scattering peak revealing both the structure and the supramolecular structure of the system could be detected at very low Q. (author). 5 refs.
Authors:
Lindner, P; [1]  Zipfel, J; Richtering, W [2] 
  1. Institut Max von Laue - Paul Langevin (ILL), 38 - Grenoble (France)
  2. Freiburg Univ. (Germany)
Publication Date:
Apr 01, 1997
Product Type:
Technical Report
Report Number:
ILL-RA-1996
Reference Number:
SCA: 665100; PA: AIX-29:017467; EDB-98:056632; SN: 98001951564
Resource Relation:
Other Information: DN: 5 refs.; PBD: Apr 1997; Related Information: Is Part Of Annual Report 96; PB: [121] p.
Subject:
66 PHYSICS; FLUCTUATIONS; LAMELLAE; LIQUID CRYSTALS; LIQUID FLOW; MOLECULAR STRUCTURE; MOMENTUM TRANSFER; NEUTRON DIFFRACTION; POLYMERS; SHEAR
OSTI ID:
593243
Research Organizations:
Institut Max von Laue - Paul Langevin (ILL), 38 - Grenoble (France).
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE98617526; TRN: FR9704849017467
Availability:
INIS; OSTI as DE98617526
Submitting Site:
FRN
Size:
pp. 24-25
Announcement Date:

Citation Formats

Lindner, P, Zipfel, J, and Richtering, W. Butterfly patterns in a sheared lamellar-system. France: N. p., 1997. Web.
Lindner, P, Zipfel, J, & Richtering, W. Butterfly patterns in a sheared lamellar-system. France.
Lindner, P, Zipfel, J, and Richtering, W. 1997. "Butterfly patterns in a sheared lamellar-system." France.
@misc{etde_593243,
title = {Butterfly patterns in a sheared lamellar-system}
author = {Lindner, P, Zipfel, J, and Richtering, W}
abstractNote = {A technologically important extension of `classical` scattering techniques is to investigate soft-matter systems under non-equilibrium conditions. Shear flow is known to have a profound influence on the structure and orientation of complex fluids like thermotropic or lyotropic liquid-crystals, colloidal and polymeric solutions. There is a fundamental interest in understanding the microscopic structure and dynamics of such complex fluids as the macroscopic material properties might change with the application of an external perturbation like shear. The following example illustrates a recent study of the influence of shear on the structure of a lyotropic lamellar phase. Results using a cone-and-plate and the ILL Couette type shear-cell were obtained by rheo-small-angle light scattering (rheo-SALS) and small-angle neutron scattering (SANS) at D11. Because of the broad range of momentum transfer Q available at D11 a characteristic butterfly-pattern with a scattering peak revealing both the structure and the supramolecular structure of the system could be detected at very low Q. (author). 5 refs.}
place = {France}
year = {1997}
month = {Apr}
}