J. Phys. II France
Volume 5, Numéro 2, February 1995
|Page(s)||249 - 262|
J. Phys. II France 5 (1995) 249-262
Diffuse X-ray Scattering from Freely Suspended Strands of a Discotic Liquid CrystalPatrick Davidson1, Marianne Clerc1, Surya S. Ghosh2, Nicholas C. Maliszewskyj2, Paul A. Heiney2, John Hynes Jr.3 and Amos B. Smith III3
1 Laboratoire de Physique des Solides Associé au C.N.R.S., Université Paris-Sud, Bâtiment 510, 91405 Orsay, France
2 Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia PA 19104, U.S.A.
3 Department of Chemistry and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia PA 19104, U.S.A.
(Received 17 August 1994, accepted 28 October 1994)
We present the first quantitative measurements of diffuse scattering in the vicinity of the Bragg peaks of a hexagonal discotic liquid crystal. The scattering takes the form of a toroid lying in the HK0 plane. The cross-section of the diffuse scattering in the H0L plane is an ellipse elongated along the L direction, in reasonable agreement with calculations for the thermal diffuse scattering. The cross section in the HK0 plane has an unexpectedly smooth six-fold sinusoidal modulation.
© Les Editions de Physique 1995