Journal ArticleDOI
High-throughput solution processing of large-scale graphene
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TLDR
The chemically converted graphene sheets that were produced have the largest area reported to date (up to 20 x 40 microm), making them far easier to process, and field-effect devices have been fabricated by conventional photolithography, displaying currents that are three orders of magnitude higher than previously reported for chemically produced graphene.Abstract:
The electronic properties of graphene, such as high charge carrier concentrations and mobilities, make it a promising candidate for next-generation nanoelectronic devices. In particular, electrons and holes can undergo ballistic transport on the sub-micrometre scale in graphene and do not suffer from the scale limitations of current MOSFET technologies. However, it is still difficult to produce single-layer samples of graphene and bulk processing has not yet been achieved, despite strenuous efforts to develop a scalable production method. Here, we report a versatile solution-based process for the large-scale production of single-layer chemically converted graphene over the entire area of a silicon/SiO(2) wafer. By dispersing graphite oxide paper in pure hydrazine we were able to remove oxygen functionalities and restore the planar geometry of the single sheets. The chemically converted graphene sheets that were produced have the largest area reported to date (up to 20 x 40 microm), making them far easier to process. Field-effect devices have been fabricated by conventional photolithography, displaying currents that are three orders of magnitude higher than previously reported for chemically produced graphene. The size of these sheets enables a wide range of characterization techniques, including optical microscopy, scanning electron microscopy and atomic force microscopy, to be performed on the same specimen.read more
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Properties, synthesis, and characterization of graphene
Liang-Xu Dong,Qiang Chen +1 more
TL;DR: Graphene is a wonder material that attracts great interests in materials science and condensed matter physics as discussed by the authors, and it is the thinnest material and also the strongest material ever measured.
Journal ArticleDOI
Preparation of Large-Size Reduced Graphene Oxide-Wrapped Ammonium Polyphosphate and Its Enhancement of the Mechanical and Flame Retardant Properties of Thermoplastic Polyurethane
TL;DR: In this paper, a facile and novel approach is provided to improve the dispersion of large-size reduced graphene oxide (LRGO) in a polymer matrix through attachment on the surface of ammonium polyphosphate (APP) in the medium of (3-aminopropyl) triethoxysilane (APTS).
Journal ArticleDOI
Enhancement of electricity production by graphene oxide in soil microbial fuel cells and plant microbial fuel cells.
Yuko Goto,Yuko Goto,Naoko Yoshida,Naoko Yoshida,Yuto Umeyama,Takeshi Yamada,Ryugo Tero,Akira Hiraishi +7 more
TL;DR: It is demonstrated that GO added to soil can be microbially reduced in soil, and facilitates electron transfer to the anode in both SMFCs and PMFCs.
Journal ArticleDOI
Polystyrene–graphene oxide modified glassy carbon electrode as a new class of polymeric nanosensors for electrochemical determination of histamine
TL;DR: In this article, a simple and rapid protocol for the synthesis of polystyrene-graphene oxide nanocomposite (PS/GONC) was achieved for first time using an in situ polymerization method.
Journal ArticleDOI
Polysaccharide-assisted rapid exfoliation of graphite platelets into high quality water-dispersible graphene sheets
Ilke Uysal Unalan,Ilke Uysal Unalan,Chaoying Wan,Silvia Trabattoni,Luciano Piergiovanni,Stefano Farris +5 more
TL;DR: In this article, the effects of polymer type, initial concentration of graphite, and ultrasonication period on the graphene yield and quality were compared, and the polysaccharide-assisted aqueous exfoliation approach enabled the production of water-dispersible graphene with high quality and large quantity, thus providing an industrially scalable route for new potential applications of graphene-based nanocomposites, e.g. in the food packaging industry.
References
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Journal ArticleDOI
The electronic properties of graphene
TL;DR: In this paper, the basic theoretical aspects of graphene, a one-atom-thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations, are discussed.
Journal ArticleDOI
Raman spectrum of graphene and graphene layers.
Andrea C. Ferrari,Jannik C. Meyer,Vittorio Scardaci,Cinzia Casiraghi,Michele Lazzeri,Francesco Mauri,S. Piscanec,Da Jiang,K. S. Novoselov,S. Roth,A. K. Geim +10 more
TL;DR: This work shows that graphene's electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers, and allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.
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
TL;DR: In this paper, a colloidal suspension of exfoliated graphene oxide sheets in water with hydrazine hydrate results in their aggregation and subsequent formation of a high surface area carbon material which consists of thin graphene-based sheets.
Journal ArticleDOI
Two-dimensional atomic crystals
Kostya S. Novoselov,Da Jiang,Fred Schedin,Timothy J. Booth,V. V. Khotkevich,Sergey V. Morozov,Andre K. Geim +6 more
TL;DR: By using micromechanical cleavage, a variety of 2D crystals including single layers of boron nitride, graphite, several dichalcogenides, and complex oxides are prepared and studied.