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[Letter] Size selection of liquid-exfoliated 2D nanosheets
journal contribution
posted on 2023-06-09, 17:11 authored by Sean OgilvieSean Ogilvie, Matthew LargeMatthew Large, Marcus O'Mara, Peter LynchPeter Lynch, Cheuk Long Frank Lee, Alice KingAlice King, Claudia Backes, Alan DaltonAlan DaltonHere we present a size selection model for liquid-exfoliated two-dimensional nanosheets. The ability to consistently select exfoliated nanosheets with desired properties is important for development of applications in all areas. The model presented facilitates determination of centrifugation parameters for production of dispersions with controlled size and thickness for different materials, solvents and exfoliation processes. Importantly, after accounting for the influence of viscosity on exfoliation, comparisons of different solvents are shown to be well described by the surface tension and Hansen parameter matching. This suggests that previous analyses may have overestimated the relative performance of more viscous solvents. This understanding can be extended to develop a model based on the force balance of nanosheets falling under viscous drag during centrifugation. By considering the microscopic aspect ratio relationships, this model can be both calibrated for size selection of nanosheets and compare the exfoliation processes themselves.
History
Publication status
- Published
File Version
- Accepted version
Journal
2D MaterialsISSN
2053-1583Publisher
IOP PublishingExternal DOI
Issue
3Volume
6Page range
031002 1-7Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Materials Physics Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-03-11First Open Access (FOA) Date
2020-04-09First Compliant Deposit (FCD) Date
2019-03-08Usage metrics
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