ISIS Neutron and Muon Source Data Journal

Multi-Resolution Investigation of Diffusion Crossover in Glass-Formers

Abstract: The dispersion of relaxation time with momentum-transfer exhibits a universal crossover in glass-formers, which is reckoned as a transition from non-Gaussian to Gaussian subdiffusion (non-Fickian). We have characterized this crossover in deep eutectic solvents (DESs) using quasielastic neutron scattering (QENS) experiments at IRIS spectrometer. However, in systems exhibiting heterogeneous dynamics, observed behaviour is expected to be dependent on instrumental resolution. Further, molecular glass-formers such as DESs are expected to exhibit an additional crossover at low momentum-transfers (inaccessible to IRIS) attributed to transition from non-Fickian to Fickian diffusion. We aim to use LET to acquire additional information across various timescales (utilizing RRM) and access lower Q values (< 0.5 Å?¹) while maintaining the energy resolution of IRIS.

Principal Investigator: Dr Veerendra K Sharma
Experimenter: Dr Subhankur Mitra
Local Contact: Dr Mona Sarter
Experimenter: Mr Harish Srinivasan
Experimenter: Dr Victoria Garcia Sakai
Experimenter: Ms Jyoti Gupta

DOI: 10.5286/ISIS.E.RB2410515

ISIS Experiment Number: RB2410515

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 Veerendra K Sharma et al; (2024): Multi-Resolution Investigation of Diffusion Crossover in Glass-Formers, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2410515

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