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Graphene is the world's strongest, thinnest and most conductive material, made from carbon. Graphene's remarkable properties enable exciting new applications. Our site brings you daily news and resources, all graphene focused.
Recent Graphene news:
The University of Wollongong from Western Australia, developed a new patented process to manufacture surfactant-free graphene. The University licensed the technology to newly founded NanoCarbon Pty Limited (not to be confused with Poland's Nano-Carbon) which will commercialize the technology.
NanoCarbon aims to start producing graphene in 2015 in Australia in a pilot line. Until then, they will source the graphene materials from the University. The company will also be involved with graphene applications - such as high barrier films, lithium ion batteries, and water purification.
This book provides a state of the art report of the knowledge accumulated in graphene research, expanding on graphene transport, optical and other properties for systems that include multilayer as well as monolayer graphene systems.
The book comprises experimental and theoretical knowledge. The book is also accessible to graduate students.
Researchers from the University of Manchester developed a new way to modify the transmission of light that goes through a silicon wire (waveguide) - by wrapping graphene around the wire. Such silicon waveguide can be used to build a photonic microchip, and have also applications in highly sensitive bio-chemical sensor devices and perhaps photo detectors too.
The waveguides in this research are built in loops shaped like oval racetracks - and are called racetrack resonators. In a bio-chemical sensor, the light that leaks out of the waveguide is used for chemical sensing. The graphene coating adds further capabilities to such a sensor, such as making it more sensitive and selective. The researchers say that the graphene dramatically alters the way the light is guided through the device.
Graphenea demonstrated how gallium nitride (GaN) can be grown on silicon using graphene as an intermediary layer. GaN (and other semiconductors) are very appealing for applications such as LEDs, lasers and high-frequency and high-power transistors, and silicon is a great substrate for this, but it is very difficult to grown high-quality epitaxial GaN films on Si(100).
Graphene (in collaboration with MIT,Ritsumeikan University, Seoul National University and Dongguk University) found out that graphene can be used as an intermediary layer in such a structure. The hexagonal lattice of graphene has the same symmetry as that of GaN, and it can also be easily transferred to a silicon wafer. The company's method results in the best GaN(0001) layers on Si(100) demonstrated to date.
Researchers discovered that lithium-doped graphene sheets (3-60 layers in thickness) result in the highest ever sheet resistance and transmittance ever reported for continuous thin-films. This may prove to be an important step towards an ITO replacement for touch panels and solar cells.
The lithium was inserted between the graphene layers. As a result of this electrochemical intercalation, the Fermi level is upshifted by the doping effect, resulting in a more transparent and conductive material.
Germany-based Microdrop Technologies (a private provider of equipment, software and services for advanced precision microdispensing and inkjet printing applications) reports that they tested graphene for for applications in micro printing, 3D printing and other related applications - and it exhibited excellent quality and characteristics.
The company will now start advanced tests for applications such as conductive inks, biochips, biomedicine and nanocoatings. Microdrop used graphene supplied by Australia-based miner company Talga Resources. This is Talga's first graphene sale.
Researchers from MIT developed a carbon-based sponge that can be used to make a steam-based energy generation device. They say that such a device can reach an energy efficiency of 85%, better than current solar-powered commercial devices.
The newly developed sponge is made from a combination of graphite flakes and carbon foam. It floats on water, and when sunlight hits it, it creates a hotspot which draws up water through the pores in the material, which evaporates as steam. The process generates very little heat and can produce steam at low solar intensity (the lowest optical concentration reported thus far).