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[Letter] Size selection of liquid-exfoliated 2D nanosheets

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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 Dalton
Here 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 Materials

ISSN

2053-1583

Publisher

IOP Publishing

Issue

3

Volume

6

Page range

031002 1-7

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Materials Physics Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-03-11

First Open Access (FOA) Date

2020-04-09

First Compliant Deposit (FCD) Date

2019-03-08

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