Chlorosulfuric acid-assisted production of functional 2D materials

Mohsen Moazzami Gudarzi, Maryana Asaad, Boyang Mao, Gergo Pinter, Jianqiang Guo, Matthew Smith, Xiangli Zhong, Thanasis Georgiou, Roman Gorbachev, Sarah Haigh, Konstantin Novoselov, Andrey Kretinin

Research output: Contribution to journalArticlepeer-review


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 disulphide 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.
Original languageEnglish
Article number35
Journaln p j 2D Materials and Applications
Issue number1
Publication statusPublished - Dec 2021

Research Beacons, Institutes and Platforms

  • Henry Royce Institute


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