Fluctuation Dynamics of Block Copolymer Vesicles
Journal Article
·
· Phys. Rev. Lett.
OSTI ID:1008470
- Yale
X-ray photon correlation spectroscopy was used to characterize the wave-vector- and temperature-dependent dynamics of spontaneous thermal fluctuations in a vesicle (L4) phase that occurs in a blend of a symmetric poly(styrene-ethylene/butylene-styrene) triblock copolymer with a polystyrene homopolymer. Measurements of the intermediate scattering function reveal stretched-exponential behavior versus time, with a stretching exponent slightly larger than 2/3. The corresponding relaxation rates show an approximate q{sup 3} dependence versus wave vector. Overall, the experimental measurements are well described by theories that treat the dynamics of independent membrane plaquettes.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1008470
- Journal Information:
- Phys. Rev. Lett., Vol. 94, Issue (1) ; 01, 2005; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- ENGLISH
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