Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep16684
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Funding
- EPSRC [EP/K016946/1]
- European Commission [GA-604391]
- MSCA project SYNCHRONICS [GA-643238]
- ANR through the LabEx project NIE
- International Center for Frontier Research in Chemistry (icFRC)
- EPSRC [EP/K016946/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K016946/1] Funding Source: researchfish
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Due to a unique combination of electrical and thermal conductivity, mechanical stiffness, strength and elasticity, graphene became a rising star on the horizon of materials science. This two-dimensional material has found applications in many areas of science ranging from electronics to composites. Making use of different approaches, unfunctionalized and non-oxidized graphene sheets can be produced; among them an inexpensive and scalable method based on liquid-phase exfoliation of graphite (LPE) holds potential for applications in opto-electronics and nanocomposites. Here we have used n-octylbenzene molecules as graphene dispersion-stabilizing agents during the graphite LPE process. We have demonstrated that by tuning the ratio between organic solvents such as N-methyl-2-pyrrolidinone or ortho-dichlorobenzene, and n-octylbenzene molecules, the concentration of exfoliated graphene can be enhanced by 230% as a result of the high affinity of the latter molecules for the basal plane of graphene. The LPE processed graphene dispersions were further deposited onto solid substrates by exploiting a new deposition technique called spincontrolled drop casting, which was shown to produce uniform highly conductive and transparent graphene films.
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