Sonication-assisted liquid exfoliation and size-dependent properties of magnetic two-dimensional α-RuCl3
Originating from the hexagonal arrangement of magnetic ions in the presence of strong spin orbit coupling, α-RuCl3 is considered as model system for the Kitaev-Heisenberg model. While the magnetic properties of α-RuCl3 have been studied in bulk single crystals or micromechanically-exfoliated nanoshe...
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
26 April 2023
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| In: |
Journal of physics. D, Applied physics
Year: 2023, Volume: 56, Issue: 27, Pages: 1-13 |
| ISSN: | 1361-6463 |
| DOI: | 10.1088/1361-6463/accc3e |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1361-6463/accc3e Verlag, lizenzpflichtig, Volltext: https://dx.doi.org/10.1088/1361-6463/accc3e 
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| Author Notes: | Kevin Synnatschke, Martin Jonak, Alexander Storm, Sourav Laha, Janis Köster, Julian Petry, Steffen Ott, Beata Szydłowska, Georg S Duesberg, Ute Kaiser, Rüdiger Klingeler, Bettina V Lotsch and Claudia Backes |
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| 245 | 1 | 0 | |a Sonication-assisted liquid exfoliation and size-dependent properties of magnetic two-dimensional α-RuCl3 |c Kevin Synnatschke, Martin Jonak, Alexander Storm, Sourav Laha, Janis Köster, Julian Petry, Steffen Ott, Beata Szydłowska, Georg S Duesberg, Ute Kaiser, Rüdiger Klingeler, Bettina V Lotsch and Claudia Backes |
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| 520 | |a Originating from the hexagonal arrangement of magnetic ions in the presence of strong spin orbit coupling, α-RuCl3 is considered as model system for the Kitaev-Heisenberg model. While the magnetic properties of α-RuCl3 have been studied in bulk single crystals or micromechanically-exfoliated nanosheets, little is known about the nanosheets’ properties after exfoliation by techniques suitable for mass production such as liquid phase exfoliation (LPE). Here, we demonstrate sonication-assisted LPE on α-RuCl3 single crystals in an inert atmosphere. Coupled with centrifugation-based size selection techniques, the accessible size- and thickness range is quantified by statistical atomic force microscopy. Individual nanosheets obtained after centrifugation-based size selection are subjected to transmission electron microscopy to confirm their structural integrity after the exfoliation. The results are combined with bulk characterisation methods, including Raman and x-ray photoelectron spectroscopy, and powder diffraction experiments to evaluate the structural integrity of the nanosheets. We report changes of the magnetic properties of the nanomaterial with nanosheet size, as well as photospectroscopic metrics for the material concentration and average layer number. Finally, a quantitative analysis on environmental effects on the nanomaterial integrity is performed based on time and temperature dependent absorbance spectroscopy revealing a relatively slow decay (half-life of ∼2000 h at 20 °C), albeit with low activation energies of 6-20 kJ mol−1. | ||
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