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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MOF-derived electrocatalysts for oxygen reduction, oxygen evolution and hydrogen evolution reactions
TL;DR: A wide range of applications based on these materials for ORR, OER, HER and multifunctional electrocatalysis are discussed, with an emphasis on the required features of MOF-derived carbon-based materials for the Electrocatalysis of corresponding reactions.
Journal ArticleDOI
Production and processing of graphene and 2d crystals
Francesco Bonaccorso,Antonio Lombardo,Tawfique Hasan,Zhipei Sun,Luigi Colombo,Andrea C. Ferrari +5 more
TL;DR: Graphene is at the center of an ever growing research effort due to its unique properties, interesting for both fundamental science and applications as mentioned in this paper, and a key requirement for applications is the development of industrial-scale, reliable, inexpensive production processes.
Journal ArticleDOI
Inkjet-printed graphene electronics.
Felice Torrisi,Tawfique Hasan,Weiping Wu,Zhipei Sun,Antonio Lombardo,Tero S. Kulmala,Gen-Wen Hsieh,Sungjune Jung,Francesco Bonaccorso,Philip J. Paul,Daping Chu,Andrea C. Ferrari +11 more
TL;DR: In this paper, a graphene-based ink by liquid phase exfoliation of graphite in N-methylpyrrolidone was used to print thin-film transistors, with mobilities up to ∼95 cm2 V 1 s−1, as well as transparent and conductive patterns, with ∼80% transmittance and ∼30 kΩ/□ sheet resistance.
Journal ArticleDOI
A review of graphene and graphene oxide sponge: material synthesis and applications to energy and the environment
TL;DR: A comprehensive review about the most recent progress in synthesis, characterization, fundamental understanding, and performance of graphene and graphene oxide sponges can be found in this paper, where the technical challenges are discussed, and several future research directions are also suggested.
Journal ArticleDOI
Graphene via sonication assisted liquid-phase exfoliation
Artur Ciesielski,Paolo Samorì +1 more
TL;DR: Liquid-phase exfoliation (LPE) methods are becoming more and more interesting because they are extremely versatile, potentially up-scalable, and can be used to deposit graphene in a variety of environments and on different substrates not available using mechanical cleavage or growth methods.
References
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Journal ArticleDOI
Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide
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