ISIS Neutron and Muon Source Data Journal

Quasi-elastic neutron scattering of thermoresponsive surfactant vesicles

Abstract: In this work, we will explore how vesicle dynamics change in response to different salt and temperature conditions. This will be achieved by preparing various aqueous solutions of a specially synthesised zwitterionic surfactant molecule - oleyl amidopropyl betaine (OAPB) - in predetermined ratios with the well-known anionic surfactant, aerosol-OT (AOT). We then will measure the dynamics and calculate mean square displacement as a function of salt concentration and temperature using quasi-elastic neutron scattering (QENS), to determine changes in conformational entropy, diffusion and flexibility (using MSD).5 This study will expand on our recent published work in the structure of the vesicles using SANS@ANSTO, and will allow us to understand the structure-dynamics correlation in these systems. We will also utilise deuterated constituents of OAPB and AOT (already provided by the National Deuteration Facility (NDF) at ANSTO) to elucidate individual contributions of molecules to the overall dynamics.

Principal Investigator: Dr Thomas McCoy
Local Contact: Dr Mona Sarter
Experimenter: Mr Lassi Tiihonen

DOI: 10.5286/ISIS.E.RB2420476

ISIS Experiment Number: RB2420476

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Thomas McCoy et al; (2025): Quasi-elastic neutron scattering of thermoresponsive surfactant vesicles, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2420476

Data is released under the CC-BY-4.0 license.