Liquid exfoliation of solvent-stabilized few-layer black phosphorus for applications beyond electronics

Hanlon, Damien, Backes, Claudia, Doherty, Evie, Cucinotta, Clotilde S, Berner, Nina C, Boland, Conor, Lee, Kangho, Harvey, Andrew, Lynch, Peter, Gholamvand, Zahra, Zhang, Saifeng, Wang, Kangpeng, Moynihan, Glenn, Pokle, Anuj, Ramasse, Quentin M, McEvoy, Niall, Blau, Werner J, Wang, Jun, Abellan, Gonzalo, Hauke, Frank, Hirsch, Andreas, Sanvito, Stefano, O’Regan, David D, Duesberg, Georg S, Nicolosi, Valeria and Coleman, Jonathan N (2015) Liquid exfoliation of solvent-stabilized few-layer black phosphorus for applications beyond electronics. Nature Communications, 6 (1). pp. 1-11. ISSN 2041-1723

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Abstract

Few-layer black phosphorus (BP) is a new two-dimensional material which is of great interest for applications, mainly in electronics. However, its lack of environmental stability severely limits its synthesis and processing. Here we demonstrate that high-quality, few-layer BP nanosheets, with controllable size and observable photoluminescence, can be produced in large quantities by liquid phase exfoliation under ambient conditions in solvents such as N-cyclohexyl-2-pyrrolidone (CHP). Nanosheets are surprisingly stable in CHP, probably due to the solvation shell protecting the nanosheets from reacting with water or oxygen. Experiments, supported by simulations, show reactions to occur only at the nanosheet edge, with the rate and extent of the reaction dependent on the water/oxygen content. We demonstrate that liquid-exfoliated BP nanosheets are potentially useful in a range of applications from ultrafast saturable absorbers to gas sensors to fillers for composite reinforcement.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Mathematical Physics Group
Subjects: Q Science
Q Science > QC Physics
Depositing User: Alice Jackson
Date Deposited: 27 Jun 2019 11:12
Last Modified: 01 Jul 2019 11:45
URI: http://sro.sussex.ac.uk/id/eprint/84622

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