Abstract
The angular dependence of longitudinal 23Na NMR spin relaxation in a lyotropic calamitic nematic phase is determined using a simple rotor technique. Analyzing the director-frame spectral densities, (ω), n = 0, 1, 2, and the quadrupole splitting shows that the experimental data cannot be accounted for in terms of the prolate micellar aggregates being uniaxial. Rather, the results indicate the micelles to be biaxial, with approximate axial ratios of ρ- ≈ 1.5 and ρ+ ≈ 3−5. Comparison with previous investigations of the nematic region in the sodium dodecyl sulfate−decanol−water system shows the interfacial curvature of the micelles to vary with composition in a way similar to that observed in the lamellar phase.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.