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Open AccessArticle

High-Quality Black Phosphorus Quantum Dots Fabricated via Microwave-Tailored Technology

Key Laboratory of Renewable Energy Advanced Materials and Manufacturing Technology, Ministry of Education, Yunnan Normal University, Kunming 650500, Yunnan, China
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Nanomaterials 2020, 10(1), 139; https://doi.org/10.3390/nano10010139
Received: 19 December 2019 / Revised: 5 January 2020 / Accepted: 7 January 2020 / Published: 13 January 2020
(This article belongs to the Special Issue Characterization, Synthesis and Applications of 2D Nanomaterials)
Black phosphorus quantum dots (BPQDs) have recently obtained great attention due to their high mobility and tunable bandgap features, which are beneficial for their potential application in photoelectronic devices. However, a precise synthesis of high-quality BPQDs is still a great challenge owing to the formation of an impurity phase when employing traditional methods. Herein, we demonstrate the scalable fabrication of BPQDs from mineralization-derived bulk black phosphorus (BP) single crystals by means of a microwave (MW)-assisted liquid-phase exfoliation method in ethanol. The primary results demonstrate that ethanol plays a crucial role in determining the final properties of BPQDs, such as their excellent tolerance to oxygen, good crystallinity, and uniform size. Furthermore, the mechanism behind the formation of BPQDs is proposed, revealing that a layer-by-layer disintegration process of bulk BP crystals under microwave-energy stimuli is responsible. This work may provide a novel path for the further development of BPQDs and corresponding devices. View Full-Text
Keywords: 2D materials; black phosphorus quantum dots; mineralization route; microwave-assisted technology; crystal disintegration 2D materials; black phosphorus quantum dots; mineralization route; microwave-assisted technology; crystal disintegration
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Du, K.; Yang, W.; Deng, S.; Li, X.; Yang, P. High-Quality Black Phosphorus Quantum Dots Fabricated via Microwave-Tailored Technology. Nanomaterials 2020, 10, 139.

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