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The structure of suspended graphene sheets
Nature, 2007The recent discovery of graphene has sparked much interest, thus far focused on the peculiar electronic structure of this material, in which charge carriers mimic massless relativistic particles. However, the physical structure of graphene—a single layer
Jannik C. Meyer +5 more
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Graphene and graphene oxide for biosensing
Monatshefte für Chemie - Chemical Monthly, 2017Graphene-based nanomaterials attract large attention in electrochemistry due to their unique properties. Reliable method to modify electrodes by graphene is necessary to obtain desired improvement. In this work, different sizes of graphite flakes for preparation of graphene oxide (GO) were tested and the final characterization of the resulting GO was ...
Ondrej Kubesa +4 more
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Transparent, conductive graphene electrodes for dye-sensitized solar cells.
Nano letters (Print), 2008Transparent, conductive, and ultrathin graphene films, as an alternative to the ubiquitously employed metal oxides window electrodes for solid-state dye-sensitized solar cells, are demonstrated.
Xuan Wang, L. Zhi, K. Müllen
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Native Graphene Oxides at Graphene Edges
IEEE Transactions on Instrumentation and Measurement, 2012The boundary between graphene flake and SiO 2 /Si substrate have been probed by scanning capacitance microscopy. Distinctive dot-like protrusions standing on the graphene edges have been observed, and the density of protrusions increases with the increase of graphene layer numbers. Spectroscopic analysis has revealed that the carrier densities at these
Shogo Kiryu +4 more
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Raman spectra of graphite oxide and functionalized graphene sheets.
Nano letters (Print), 2008We investigate Raman spectra of graphite oxide and functionalized graphene sheets with epoxy and hydroxyl groups and Stone-Wales and 5-8-5 defects by first-principles calculations to interpret our experimental results.
K. Kudin +5 more
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Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors
Science, 2012Infrared Route to Graphene Electrodes Electrochemical capacitors can deliver large amounts of power quickly, but have limited energy storage because only the surface regions of electrodes can store charge.
M. El‐Kady +3 more
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Biomedical Applications of Graphene and Graphene Oxide
Accounts of Chemical Research, 2013Graphene has unique mechanical, electronic, and optical properties, which researchers have used to develop novel electronic materials including transparent conductors and ultrafast transistors. Recently, the understanding of various chemical properties of graphene has facilitated its application in high-performance devices that generate and store ...
Dal-Hee Min +5 more
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Chemistry Makes Graphene beyond Graphene
Journal of the American Chemical Society, 2014Although graphene is extremely inert in chemistry because of the giant delocalized π electron system, various methods have been developed to achieve its efficient chemical modification. Covalent chemistry is effective to modulate the physical properties of graphene. By converting the sp(2) hybridized carbon atoms to sp(3) ones, new two-dimensional (2D)
Zhongfan Liu, Lei Liao, Hailin Peng
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Nitrogen-doped graphene as efficient metal-free electrocatalyst for oxygen reduction in fuel cells.
ACS Nano, 2010Nitrogen-doped graphene (N-graphene) was synthesized by chemical vapor deposition of methane in the presence of ammonia. The resultant N-graphene was demonstrated to act as a metal-free electrode with a much better electrocatalytic activity, long-term ...
L. Qu, Y. Liu, Jong‐Beom Baek, L. Dai
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Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor.
Nature Nanotechnology, 2007The recent discovery of graphene has led to many advances in two-dimensional physics and devices. The graphene devices fabricated so far have relied on SiO(2) back gating.
A. Das +10 more
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