Showing results 1 to 20 of 23

May 18, 2012 by

Quantum dots boost graphene's photodetector dreams

Researchers working at the Institute of Photonic Sciences (ICFO) in Barcelona have built a super-sensitive photodetector by combining graphene with semiconducting quantum dots that outperforms other graphene based devices by a billion times.Speaking to PhysicsWorld , lead researcher Gerasimos Konstantatos explains: “We managed to successfully combine graphene with semiconducting nanocrystals to create complete new functionalities in terms of light sensing and light conversion to electricity.

April 25, 2012 by

IBM demos tunable terahertz filters

Graphene has shown itself, once again, to be capable of great wonders, as IBM demonstrates a notch filter that operates in the terahertz – or infrared - range. The company also showed off a linear polariser using the same stacked material.

October 3, 2011 by

Osborne puts £50m into UK graphene research

Chancellor George Osborne has promised £50 million for research into graphene, the carbon-based material tipped as a breakthrough in material science, nanotechnology and electronics.Graphene was discovered in 2004 by Dr (now Professor) Kostya Novoselov and Professor Andre Geim from the University of Manchester in work that won them the 2010 Nobel Prize for physics.

September 13, 2011 by

Graphene auditions for lead in Terahertz productions

Two teams of US researchers have got their eye on graphene to advance the state of the art in medical imaging, communications and security screening, thanks to its strong response to the terahertz region of the electromagnetic spectrum.Writing in Nature Nanotechnology, scientists from Lawrence Berkeley National Laboratory and the University of California at Berkeley, explain how nanoribbons of graphene could form the "beginnings of a toolset" for working with terahertz radiation.

August 25, 2011 by

Graphene gets sticky, thanks Van der Waals

Graphene can add unusual stickiness to its list of amazing properties. The two dimensional wonder material, set to take over the world thanks to its conductivity, strength, stiffness, thinness and so on (as long as all our research institutions can get themselves in gear), has also been shown to have "ultrastrong adhesion".

May 18, 2011 by

Graphene's good vibrations for supersensitive detectors

Graphene and its curlier cousin, the carbon nanotube, could revolutionise yet another field, as researchers find that when built into teeny tiny resonators, they have been shown to exhibit non-linear damping.Oh-ho, you say, this could lead to supersensitive devices to detect force or mass.

April 5, 2011 by

Graphene adds self-cooling to list of super powers

Graphene, twice threatened by silicon's atom-thick offspring silicene, the pretender to its carbon throne, has hit back with yet another amazing characteristic: transistors made from the atom-tick carbon mesh will cool themselves.Heat is the bane of the electronics industry’s life.

July 19, 2008 by

Looking at single atoms of hydrogen

As you probably know, graphene is a one-atom-thick sheet of carbon atoms packed in a dense two-dimensional honeycomb lattice. And it recently became very popular recently as a basis for ultra-fast transistors. Now, according to Science News, U.S. researchers are using graphene to image individual hydrogen atoms via a standard transmission electron microscope (TEM) technology. Until now, heavy atoms, such as carbon, could be detected by electron microscopy. But the physicists from Berkeley, California, have shown it's possible to track the smallest atoms, hydrogen ones. But read more...


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