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Download fileScalable production of large quantities of defect-free few-layer graphene by shear exfoliation in liquids
journal contribution
posted on 2023-06-07, 06:37 authored by Keith R Paton, Eswaraiah Varrla, Claudia Backes, Ronan J Smith, Umar Khan, Arlene O’Neill, Conor BolandConor Boland, Mustafa Lotya, Oana M Istrate, Paul King, Tom Higgins, Sebastian Barwich, Peter May, Pawel Puczkarski, Iftikhar Ahmed, Matthias Moebius, Henrik Pettersson, Edmund Long, João Coelho, Sean E O’Brien, Eva K McGuire, Beatriz Mendoza Sanchez, Georg S Duesberg, Niall McEvoy, Timothy J Pennycook, Clive Downing, Alison Crossley, Valeria Nicolosi, Jonathan N ColemanTo progress from the laboratory to commercial applications, it will be necessary to develop industrially scalable methods to produce large quantities of defect-free graphene. Here we show that high-shear mixing of graphite in suitable stabilizing liquids results in large-scale exfoliation to give dispersions of graphene nanosheets. X-ray photoelectron spectroscopy and Raman spectroscopy show the exfoliated flakes to be unoxidized and free of basal-plane defects. We have developed a simple model that shows exfoliation to occur once the local shear rate exceeds 10(4) s(-1). By fully characterizing the scaling behaviour of the graphene production rate, we show that exfoliation can be achieved in liquid volumes from hundreds of millilitres up to hundreds of litres and beyond. The graphene produced by this method performs well in applications from composites to conductive coatings. This method can be applied to exfoliate BN, MoS2 and a range of other layered crystals.
History
Publication status
- Published
File Version
- Accepted version
Journal
Nature MaterialsISSN
1476-1122Publisher
Nature ResearchExternal DOI
Issue
6Volume
13Page range
624-630Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Mathematical Physics Group Publications
Full text available
- Yes
Peer reviewed?
- Yes