tailieunhanh - High quality black phosphorus atomic layers by liquid phase exfoliation

2D nanomaterials such as graphene and transition metal dichal  cogenides (TMDCS) have shown outstanding potential in many fields such as fl exible electronics, sensing and optics due to their desirable physical and structural properties. High quality black phosphorus atomic layers by liquid phase exfoliation include Experimental Section; Supporting Information and Acknowledgements. | Uu4s ADVANCED. ---------------------------------------------------------------------- MATERIALS High-Quality Black Phosphorus Atomic Layers by Liquid-Phase Exfoliation Poya YasaeÍ Bijandra Kumar Tara Foroozan Canhui Wang Mohammad Asadi David Tuschel J. Ernesto Indacochea Robert F. Klie and Amin Salehi-Khojin 2D nanomaterials such as graphene and transition metal dichalcogenides TMDCs have shown outstanding potential in many fields such as flexible electronics 1 sensing 2 3 and optics 4 due to their desirable physical and structural properties. 5-7 Among these materials graphene has the highest charge carrier mobility 8 but absence of a bandgap limits its practice in many applications. 9 On the other hand molybdenum disulfide MoS2 atomic layers offer a noticeable bandgap resulting in extraordinary on off ratios 108 10 but the material suffers from moderate charge carrier mobility. 11 Recent discovery of black phosphorus BP atomic layers called phosphorene holds promise to be widely used as an alternative 2D semiconductor in many areas of electronics and optoelectronics owing to its high mobility 12-14 tunable direct bandgap 14-16 large on off ratios 105 13 14 and anisotropic properties. 13 17 18 However most of the studies on BP atomic layers so far 12-15 19-21 have used the mechanical exfoliation technique which is only suitable for laboratory level demonstrations. To harvest the material s excellent properties it is essential to employ scalable techniques to produce large quantities of exfoliated nanoflakes. In this report we employed the liquid-phase exfoliation technique to produce highly crystalline atomically thin BP nanoflakes in the solution form by using ultrasonic energy as a source to break down the inter-layer van der Waals forces in appropriate solvents see Experimental Section . We surveyed several solvents from different chemical families such as alcohols chloro-organic solvents ketones cyclic or aliphatic .

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• High quality black phosphorus atomic layers
• High quality black phosphorus
• Black phosphorus
• Experimental Section black phosphorus
• Supporting Information black phosphorus
• Acknowledgements black phosphorus