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Title: Chlorosulfuric acid-assisted production of functional 2D materials
Authors: Moazzami Gudarzi, Mohsen
Asaad, Maryana
Mao, Boyang
Pinter, Gergo
Guo, Jianqiang
Smith, Matthew
Zhong, Xiangli
Georgiou, Thanasis
Gorbachev, Roman
Haigh, Sarah J.
Novoselov, Kostya S. 
Kretinin, Andrey V.
Issue Date: 6-Apr-2021
Publisher: Nature Research
Citation: Moazzami Gudarzi, Mohsen, Asaad, Maryana, Mao, Boyang, Pinter, Gergo, Guo, Jianqiang, Smith, Matthew, Zhong, Xiangli, Georgiou, Thanasis, Gorbachev, Roman, Haigh, Sarah J., Novoselov, Kostya S., Kretinin, Andrey V. (2021-04-06). Chlorosulfuric acid-assisted production of functional 2D materials. npj 2D Materials and Applications 5 (1) : 35. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: The use of two-dimensional materials in bulk functional applications requires the ability to fabricate defect-free 2D sheets with large aspect ratios. Despite huge research efforts, current bulk exfoliation methods require a compromise between the quality of the final flakes and their lateral size, restricting the effectiveness of the product. In this work, we describe an intercalation-assisted exfoliation route, which allows the production of high-quality graphene, hexagonal boron nitride, and molybdenum disulfide 2D sheets with average aspect ratios 30 times larger than that obtained via conventional liquid-phase exfoliation. The combination of chlorosulfuric acid intercalation with in situ pyrene sulfonate functionalisation produces a suspension of thin large-area flakes, which are stable in various polar solvents. The described method is simple and requires no special laboratory conditions. We demonstrate that these suspensions can be used for fabrication of laminates and coatings with electrical properties suitable for a number of real-life applications. © 2021, The Author(s).
Source Title: npj 2D Materials and Applications
ISSN: 2397-7132
DOI: 10.1038/s41699-021-00215-2
Rights: Attribution 4.0 International
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