s41598-017-17123-5.pdf (3.16 MB)
Considerations for spectroscopy of liquid-exfoliated 2D materials: emerging photoluminescence of N-methyl-2-pyrrolidone
journal contribution
posted on 2023-06-09, 09:09 authored by Sean OgilvieSean Ogilvie, Matthew LargeMatthew Large, Giuseppe Fratta, Manuela Meloni, Ruben Canton-Vitoria, Nikos Tagmatarchis, Florian Massuyeau, Christopher P Ewels, Alice KingAlice King, Alan DaltonAlan DaltonN-methyl-2-pyrrolidone (NMP) has been shown to be the most effective solvent for liquid phase exfoliation and dispersion of a range of 2D materials including graphene, molybdenum disulphide (MoS2) and black phosphorus. However, NMP is also known to be susceptible to sonochemical degradation during exfoliation. We report that this degradation gives rise to strong visible photoluminescence of NMP. Sonochemical modifcation is shown to infuence exfoliation of layered materials in NMP and the optical absorbance of the solvent in the dispersion. The emerging optical properties of the degraded solvent present challenges for spectroscopy of nanomaterial dispersions; most notably the possibility of observing solvent photoluminescence in the spectra of 2D materials such as MoS2, highlighting the need for stable solvents and exfoliation processes to minimise the infuence of solvent degradation on the properties of liquid-exfoliated 2D materials.
Funding
Enabling Excellence - Graphene based nanomaterials four touchscreen technologies: Comprehension, Commerce and Communication; G1865; EUROPEAN UNION; 642742
History
Publication status
- Published
File Version
- Published version
Journal
Scientific ReportsISSN
2045-2322Publisher
Nature Publishing GroupExternal DOI
Issue
a16706Volume
7Page range
1-7Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Materials Physics Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-12-04First Open Access (FOA) Date
2017-12-04First Compliant Deposit (FCD) Date
2017-12-02Usage metrics
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