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Fine Structure Constant Defines Visual Transparency of Graphene
It is shown that the opacity of suspended graphene is defined solely by the fine structure constant, a = e2/hc � 1/137 (where c is the speed of light), the parameter that describes coupling between light and relativistic electrons and that is traditionally associated with quantum electrodynamics rather than materials science. Expand
Detection of individual gas molecules adsorbed on graphene.
- F. Schedin, Andre K. Geim, +4 authors K. Novoselov
- Materials Science, Physics
- Nature materials
- 29 October 2006
Graphene is an exceptionally low-noise material electronically, which makes it a promising candidate not only for chemical detectors but also for other applications where local probes sensitive to external charge, magnetic field or mechanical strain are required. Expand
Control of Graphene's Properties by Reversible Hydrogenation: Evidence for Graphane
This work illustrates the concept of graphene as a robust atomic-scale scaffold on the basis of which new two-dimensional crystals with designed electronic and other properties can be created by attaching other atoms and molecules. Expand
Making graphene visible
Microfabrication of graphene devices used in many experimental studies currently relies on the fact that graphene crystallites can be visualized using optical microscopy if prepared on top of Si… Expand
Graphene-based liquid crystal device.
This letter demonstrates liquid crystal devices with electrodes made of graphene that show excellent performance with a high contrast ratio and discusses the advantages of graphene compared to conventionally used metal oxides in terms of low resistivity, high transparency and chemical stability. Expand
Fluorographene: a two-dimensional counterpart of Teflon.
F fluorographene is a high-quality insulator that inherits the mechanical strength of graphene, exhibiting a Young's modulus of 100 N m(-1) and sustaining strains of 15%. Expand
Spectroscopic ellipsometry of graphene and an exciton-shifted van Hove peak in absorption
We demonstrate that optical transparency of any two-dimensional system with a symmetric electronic spectrum is governed by the fine structure constant and suggest a simple formula that relates a… Expand
Hunting for monolayer boron nitride: optical and Raman signatures.
We describe the identification of single- and few- layer boron nitride. Its optical contrast is much smaller than that of graphene but even monolayers are discernable by optimizing viewing… Expand
Micrometer-scale ballistic transport in encapsulated graphene at room temperature.
- A. Mayorov, R. Gorbachev, +8 authors Andre K. Geim
- Materials Science, Medicine
- Nano letters
- 23 March 2011
The encapsulation makes graphene practically insusceptible to the ambient atmosphere and, simultaneously, allows the use of boron nitride as an ultrathin top gate dielectric. Expand