Datum
2023-04-26Autor
Synnatschke, KevinJonak, MartinStorm, AlexanderLaha, SouravKöster, JanisPetry, JulianOtt, SteffenSzydłowska, BeataDüsberg, Georg S.Kaiser, UteKlingeler, RüdigerLotsch, Bettina ValeskaBackes, ClaudiaSchlagwort
530 Physik Zweidimensionales MaterialFlüssiger ZustandNanostrukturiertes MaterialRutheniumMetadata
Zur Langanzeige
Aufsatz
Sonication-assisted liquid exfoliation and size-dependent properties of magnetic two-dimensional α-RuCl₃
Zusammenfassung
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.
Zitierform
In: Journal of Physics D: Applied Physics Volume 56 / Number 27 (2023-04-26) eissn:1361-6463Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202308288701,
author={Synnatschke, Kevin and Jonak, Martin and Storm, Alexander and Laha, Sourav and Köster, Janis and Petry, Julian and Ott, Steffen and Szydłowska, Beata and Düsberg, Georg S. and Kaiser, Ute and Klingeler, Rüdiger and Lotsch, Bettina Valeska and Backes, Claudia},
title={Sonication-assisted liquid exfoliation and size-dependent properties of magnetic two-dimensional α-RuCl₃},
journal={Journal of Physics D: Applied Physics},
year={2023}
}
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2023-08-30T09:22:55Z 2023-08-30T09:22:55Z 2023-04-26 doi:10.17170/kobra-202308288701 http://hdl.handle.net/123456789/15039 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ liquid phase exfoliation RuCl₃ 2D material size selection nanomaterial stability 530 Sonication-assisted liquid exfoliation and size-dependent properties of magnetic two-dimensional α-RuCl₃ Aufsatz 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. open access Synnatschke, Kevin Jonak, Martin Storm, Alexander Laha, Sourav Köster, Janis Petry, Julian Ott, Steffen Szydłowska, Beata Düsberg, Georg S. Kaiser, Ute Klingeler, Rüdiger Lotsch, Bettina Valeska Backes, Claudia 12 Seiten doi:10.1088/1361-6463/accc3e Zweidimensionales Material Flüssiger Zustand Nanostrukturiertes Material Ruthenium publishedVersion eissn:1361-6463 Number 27 Journal of Physics D: Applied Physics Volume 56 false 274001
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