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Size selection of liquid-exfoliated 2D nanosheets

Here we present a size selection model for liquid-exfoliated 2D 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 produ...

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Main Authors: Ogilvie, Sean P. (Author) , Large, Matthew J. (Author) , O'Mara, Marcus A. (Author) , Lynch, Peter J. (Author) , Lee, Cheuk Long (Author) , King, Alice A. K. (Author) , Backes, Claudia (Author) , Dalton, Alan B. (Author)
Format: Article (Journal)
Language:English
Published: 9 April 2019
In: 2D Materials
Year: 2019, Volume: 6, Issue: 3, Pages: ?
ISSN:2053-1583
DOI:10.1088/2053-1583/ab0dc3
Online Access:Verlag, Volltext: https://doi.org/10.1088/2053-1583/ab0dc3
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Author Notes:Sean P. Ogilvie, Matthew J. Large, Marcus A. O'Mara, Peter J. Lynch, Cheuk Long Lee, Alice A.K. King, Claudia Backes, Alan B. Dalton
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Summary:Here we present a size selection model for liquid-exfoliated 2D 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.
Item Description:Gesehen am 19.08.2019
Physical Description:Online Resource
ISSN:2053-1583
DOI:10.1088/2053-1583/ab0dc3

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