منابع مشابه
Seeing graphene-based sheets
Graphene is two-dimensional nanomaterial consisting of a single layer of sp2 network of carbon atoms (Fig. 1a)1. While the thickness of a graphene sheet is on the order of a single atomic unit, its lateral dimension can approach up to tens of microns. Graphene and its derivatives such as graphene oxide (GO) (Fig. 1b), and reduced graphene oxide (r-GO, a.k.a. chemically modified graphene) (Fig. ...
متن کاملGraphene oxide sheets at interfaces.
Graphite oxide sheet, now called graphene oxide (GO), is the product of chemical exfoliation of graphite and has been known for more than a century. GO has been largely viewed as hydrophilic, presumably due to its excellent colloidal stability in water. Here we report that GO is an amphiphile with hydrophilic edges and a more hydrophobic basal plane. GO can act like a surfactant, as measured by...
متن کاملElectromechanical resonators from graphene sheets.
Nanoelectromechanical systems were fabricated from single- and multilayer graphene sheets by mechanically exfoliating thin sheets from graphite over trenches in silicon oxide. Vibrations with fundamental resonant frequencies in the megahertz range are actuated either optically or electrically and detected optically by interferometry. We demonstrate room-temperature charge sensitivities down to ...
متن کاملGraphene oxide as surfactant sheets*
Graphite oxide sheet, now referred to as graphene oxide (GO), is the product of chemical oxidation and exfoliation of graphite powders that was first synthesized over a century ago. Interest in this old material has resurged in recent years, especially after the discovery of graphene, as GO is considered a promising precursor for the bulk production of graphene-based materials. GO sheets are si...
متن کاملConformal Invariance of Graphene Sheets
Suspended graphene sheets exhibit correlated random deformations that can be studied under the framework of rough surfaces with a Hurst (roughness) exponent 0.72 ± 0.01. Here, we show that, independent of the temperature, the iso-height lines at the percolation threshold have a well-defined fractal dimension and are conformally invariant, sharing the same statistical properties as Schramm-Loewn...
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ژورنال
عنوان ژورنال: Materials Today
سال: 2014
ISSN: 1369-7021
DOI: 10.1016/j.mattod.2014.06.011