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
Citations
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Journal ArticleDOI
A Critical Review of Glucose Biosensors Based on Carbon Nanomaterials: Carbon Nanotubes and Graphene
Zhigang Zhu,Luis Garcia-Gancedo,Andrew J. Flewitt,Huaqing Xie,Francis Moussy,William I. Milne +5 more
TL;DR: This review outlines the current status and future direction for carbon nanomaterials to be used in the sensing area and discusses synthesis methods, up-to-date sensing approaches and nonenzymatic hybrid sensors.
Journal ArticleDOI
Three-dimensional self-assembly of graphene oxide platelets into mechanically flexible macroporous carbon films.
Sun Hwa Lee,Hyun Wook Kim,Jin Ok Hwang,Won Jun Lee,Joon Kwon,Christopher W. Bielawski,Rodney S. Ruoff,Sang Ouk Kim +7 more
TL;DR: The self-assembly of chemically modified graphene platelets into a complex 3D morphology was achieved by the “breath-figure” method, which is a straightforward procedure for synthesizing large-area porous polymer films.
Journal ArticleDOI
Graphene oxide modified with PMMA via ATRP as a reinforcement filler
Gil Gonçalves,Paula A.A.P. Marques,Ana Barros-Timmons,Igor Bdkin,Manoj K. Singh,Nazanin Emami,José Grácio +6 more
TL;DR: In this paper, the surface of the PMMA grafted graphene oxide (GPMMA) was characterized by AFM, HRTEM, Raman, FTIR and contact angle.
PatentDOI
Direct chemical vapor deposition of graphene on dielectric surfaces
Yuegang Zhang,Ariel Ismach +1 more
TL;DR: In this paper, a substrate is provided that has a metallic layer on a substrate surface of a substrate, and a film made of a two dimensional (2D) material, such as graphene, is deposited on a metallic surface of the metallic layer.
Journal ArticleDOI
One-pot reduction of graphene oxide at subzero temperatures
TL;DR: A new reducing agent system is reported: hydriodic acid with trifluoroacetic acid, which can chemically convert graphene oxide into reduced graphene oxide at temperatures below 0 °C in solution, which is the first achievement to produce reduced grapheneoxide at subzero temperature with a mass production.
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
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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.