Impact of the MoS2 starting material on the dispersion quality and quantity after liquid phase exfoliation
Liquid phase exfoliation has evolved to an important and widely used production technique for 2D materials, giving access to large quantities of nanosheets in the liquid phase. Post-exfoliation size selection, for example by liquid cascade centrifugation, can be applied to tune nanosheet lateral siz...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
16 September 2019
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| In: |
Chemistry of materials
Year: 2019, Jahrgang: 31, Heft: 20, Pages: 8424-8431 |
| ISSN: | 1520-5002 |
| DOI: | 10.1021/acs.chemmater.9b02336 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1021/acs.chemmater.9b02336
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| Verfasserangaben: | Steffen Ott, Nadja Wolff, Farnia Rashvand, Vaishnavi J. Rao, Jana Zaumseil, Claudia Backes |
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| 245 | 1 | 0 | |a Impact of the MoS2 starting material on the dispersion quality and quantity after liquid phase exfoliation |c Steffen Ott, Nadja Wolff, Farnia Rashvand, Vaishnavi J. Rao, Jana Zaumseil, Claudia Backes |
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| 520 | |a Liquid phase exfoliation has evolved to an important and widely used production technique for 2D materials, giving access to large quantities of nanosheets in the liquid phase. Post-exfoliation size selection, for example by liquid cascade centrifugation, can be applied to tune nanosheet lateral sizes and thicknesses. Various starting materials from powders to high-quality crystals can be used for the process. However, the impact of the starting material on the dispersion quality and quantity is widely unexplored. Here, we performed liquid phase exfoliation combined with liquid cascade centrifugation on six different MoS2 starting materials and assessed nanosheet yield, lateral size, and layer number using established quantitative spectroscopic metrics. We show that both yield and nanosheet dimensions are widely unaffected by the choice of the starting material. In contrast, some impact is observed with respect to optical properties, such as photoluminescence of the monolayers. We find that the photoluminescence intensity is lower for small crystallite bulk materials. | ||
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