Dynamics of Block Copolymer Micelles Revealed by X-Ray Intensity Fluctuation Spectroscopy

S. G. J. Mochrie; A. M. Mayes; A. R. Sandy; M. Sutton; S. Brauer; G. B. Stephenson; D. L. Abernathy; G. Grübel

doi:10.1103/PhysRevLett.78.1275

Dynamics of Block Copolymer Micelles Revealed by X-Ray Intensity Fluctuation Spectroscopy

S. G. J. Mochrie, A. M. Mayes, A. R. Sandy, M. Sutton, S. Brauer, G. B. Stephenson, D. L. Abernathy, and G. Grübel

Phys. Rev. Lett. 78, 1275 – Published 17 February 1997

Abstract

We report x-ray intensity fluctuation spectroscopy measurements of the equilibrium dynamics of polymer micelle liquids, composed of polystyrene-polyisoprene block copolymer micelles within a polystyrene homopolymer matrix. The equilibrium dynamics were investigated for times between one and several hundred seconds, and for wave vectors from 0.003 to $0.015 Å^{- 1}$ , far beyond wave vectors that can be studied with visible light. A wave-vector-dependent diffusion coefficient is found.

Received 8 November 1996

DOI:https://doi.org/10.1103/PhysRevLett.78.1275

Authors & Affiliations

S. G. J. Mochrie¹, A. M. Mayes¹, A. R. Sandy¹, M. Sutton², S. Brauer³, G. B. Stephenson⁴, D. L. Abernathy⁵, and G. Grübel⁵

¹Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
²Department of Physics, McGill University, Montréal, Québec, Canada
³Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439
⁴Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
⁵European Synchrotron Radiation Facility, 38043 Grenoble, France