High-yield production of graphene by liquid-phase exfoliation of graphite
Yenny Hernandez,Valeria Nicolosi,Mustafa Lotya,Fiona M. Blighe,Zhenyu Sun,Sukanta De,I.T. McGovern,Brendan Holland,Michele T. Byrne,Yurii K. Gun'ko,John J. Boland,Peter Niraj,Georg S. Duesberg,Satheesh Krishnamurthy,Robbie Goodhue,John L. Hutchison,Vittorio Scardaci,Andrea C. Ferrari,Jonathan N. Coleman +18 more
TLDR
Graphene dispersions with concentrations up to approximately 0.01 mg ml(-1), produced by dispersion and exfoliation of graphite in organic solvents such as N-methyl-pyrrolidone are demonstrated.Abstract:
Fully exploiting the properties of graphene will require a method for the mass production of this remarkable material. Two main routes are possible: large-scale growth or large-scale exfoliation. Here, we demonstrate graphene dispersions with concentrations up to approximately 0.01 mg ml(-1), produced by dispersion and exfoliation of graphite in organic solvents such as N-methyl-pyrrolidone. This is possible because the energy required to exfoliate graphene is balanced by the solvent-graphene interaction for solvents whose surface energies match that of graphene. We confirm the presence of individual graphene sheets by Raman spectroscopy, transmission electron microscopy and electron diffraction. Our method results in a monolayer yield of approximately 1 wt%, which could potentially be improved to 7-12 wt% with further processing. The absence of defects or oxides is confirmed by X-ray photoelectron, infrared and Raman spectroscopies. We are able to produce semi-transparent conducting films and conducting composites. Solution processing of graphene opens up a range of potential large-area applications, from device and sensor fabrication to liquid-phase chemistry.read more
Citations
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One-pot green synthesis of graphene oxide/gold nanocomposites as SERS substrates for malachite green detection
TL;DR: Taking the advantages of the electromagnetic and chemical enhancement mechanism and the high affinity of GO and AuNPs towards positive dyes, a sensitive, selective and label-free malachite green (MG) detection method was demonstrated.
Journal ArticleDOI
Photoconductivity of solution-processed MoS2 films
Graeme Cunningham,Umar Khan,Claudia Backes,Damien Hanlon,David McCloskey,John F. Donegan,Jonathan N. Coleman +6 more
TL;DR: In this paper, solution-exfoliated MoS2 nano-platelets were formed into thin films by deposition onto a water surface followed by transfer to indium tin oxide coated glass.
Journal ArticleDOI
Thermal Properties of the Binary-Filler Composites with Few-Layer Graphene and Copper Nanoparticles
Zahra Barani,Amirmahdi Mohammadzadeh,Adane K. Geremew,Chun Yu Tammy Huang,Devin Coleman,Lorenzo Mangolini,Fariborz Kargar,Alexander A. Balandin +7 more
TL;DR: In this article, the thermal properties of an epoxy-based binary composites comprised of graphene and copper nanoparticles are reported, and the effect of the "synergistic" filler effect, revealed as a strong enhancement of the thermal conductivity of composites with the size-dissimilar fillers, has a well-defined filler loading threshold.
Journal ArticleDOI
Bulk growth of mono- to few-layer graphene on nickel particles by chemical vapor deposition from methane
Zongping Chen,Wencai Ren,Bilu Liu,Libo Gao,Songfeng Pei,Zhong-Shuai Wu,Jinping Zhao,Hui-Ming Cheng +7 more
TL;DR: In this paper, a method for the bulk growth of mono-to few-layer graphene on nickel particles by chemical vapor deposition from methane at atmospheric pressure is described, and a graphene yield of about 2.5% of the weight of nickel particles used was achieved in a growth time of 5 min.
Journal ArticleDOI
Liquid-phase exfoliation of graphite for mass production of pristine few-layer graphene
Ying Wei,Zhenyu Sun +1 more
TL;DR: In this article, the authors highlight the advances in exfoliation and dispersion of graphene in water and organic solvents using different surfactants, polymers and other stabilizers.
References
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Journal ArticleDOI
Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide
Sasha Stankovich,Dmitriy A. Dikin,Richard D. Piner,Kevin A. Kohlhaas,Alfred Kleinhammes,Yuanyuan Jia,Yue Wu,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
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