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GRAPHENE NEWS
Graphene-Silicon PICs for Low-Power Telecom NEW YORK, July 16, 2012 — A one-carbon-atom-thick sheet of graphene has transformed a passive device into an active one that generates microwave photonic signals and performs parametric wavelength conversion at telecommunication wavelengths. This optical nonlinear behavior could lead to broad applications in optical interconnects and low-power photonic integrated circuits.
Plasmonic Capabilities of Graphene Brought to Light SAN DIEGO, and BARCELONA, Spain, June 21, 2012 — Graphene has been found to be an excellent host for guiding, confining and electrically manipulating light, two independent studies report.
Smallest Possible Five-Ringed Structure Created LONDON, June 7, 2012 — In honor of the upcoming Summer Olympics, the smallest possible five-ringed structure – just 1.2 nm in width and about 100,000 times thinner than a human hair – has been created and imaged using a combination of synthetic chemistry and...
Dopant Breaks Graphene Solar Efficiency Record GAINESVILLE, Fla., May 25, 2012 — Chemically treated graphene has upped the material’s solar power conversion efficiency from 2.9 percent to a record-breaking 8.6 percent. Researchers at the University of Florida have taken graphene, a single-atom-thick lattice of carbon...
New Candidates Sought for Metamaterial Conductors AMES, Iowa, April 26, 2012 — A new method that evaluates different conductors for use in metamaterial structures could bring closer to reality super-efficient solar energy devices and superlenses that allow us to use visible light to see molecules like DNA.
A Faster, Cheaper Way to Cool Lasers RALEIGH, N.C., April 10, 2012 — A “heat spreader” that cools electronics 25 percent faster than pure copper could end the hunt for a faster, cheaper way to cool computers and other electronic devices.
Optical Drive Etches Graphene Supercapacitors LOS ANGELES, March 21, 2012 — The search for an optimal electrochemical capacitor has been held up by the need for an electrode with energy density comparable to that of a battery. A novel graphene-based electrode, produced with a standard LightScribe DVD optical drive, could...
Cold Atoms in an Optical Lattice Simulate Graphene ZURICH, March 15, 2012 — A tunable system of ultracold atoms was used to create a honeycomb-like structure similar to that found in graphene. The results may help identify the electronic properties of materials that have yet to be discovered.
Fiber Optic Advances Announced at OFC/NFOEC Mar 7, 2012 — LOS ANGELES, March 7, 2012 — From the ability to incorporate a hybrid tunable laser on silicon to breaking digital communications speed limits with graphene-based optical modulators, the latest news and research in optical communications is...
Carbon Fibers Turned into Graphene Quantum Dots HOUSTON, Jan. 18, 2012 — Common carbon fiber can be turned into graphene quantum dots in a one-step chemical process much simpler than established techniques for making the semiconducting nanocrystals. This discovery could prove useful in optical, biomedical and electronic...
Redefining the Kilogram and Ampere with Graphene TEDDINGTON, England, Oct. 5, 2011 — Groundbreaking research by the National Physical Laboratory's (NPL) Quantum Detection Group and an international team is underpinning the biggest change in the Système Internationale d'unités (SI Units) since the system began 50 years...
Dream Screens from Graphene HOUSTON, Aug. 4, 2011 — Graphene-based electrodes developed by a team at Rice University could revolutionize touch-screen displays, solar panels and LED lighting, bringing flexible, transparent electronics closer to reality. Flexible, see-through video screens may be...
Synchrotron Imaging Shows How Folds Affect Graphene BUFFALO, N.Y., June 30, 2011 — Synchrotron light sources have revealed electron clouds on the surface of graphene, showing how folds and ripples in the material can harm its conductivity. The research, scheduled to appear June 28 in Nature Communications, was conducted by...
Laser Induces Conduction in Graphene COLLEGE PARK, Md., June 20, 2011 — By illuminating graphene with a mid-infrared laser, researchers now can open an observable bandgap in the otherwise gapless material, enabling it to become a semiconductor. Graphene is the thinnest and strongest material ever discovered. It is...
1-Atom-Thick Optical Devices Proposed PHILADELPHIA, June 13, 2011 — One-atom-thick metamaterials that can be achieved by controlling the conductivity of sheets of graphene have been proposed by two University of Pennsylvania engineers. Professor Nader Engheta and graduate student Ashkan Vakil, both of the...
Graphene Optical Modulators Could Speed Communications BERKELEY, Calif., May 12, 2011 — Digital communications speed limits could soon be broken, thanks to a new graphene-based optical device that could theoretically reach as high as 500 GHz for a single modulator. Xiang Zhang, an engineering professor at the University of...
Cell Imaging Improves Under Graphene MANHATTAN, Kan., March 28, 2011 — A microscopic cloak made of graphene could change the way bacteria and other cells are imaged. Vikas Berry of Kansas State University and his research team are wrapping bacteria with graphene to address challenges with imaging bacteria under...
Light Scattering Controlled in Graphene BERKELEY, Calif., March 21, 2011 — Controlling the way light is scattered in graphene has been achieved, providing a new tool for the study of these single sheets of carbon that may lead to practical applications for controlling light and electronic states in nanometer-scale devices...
Si Alternative is Better Than Graphene LAUSANNE, Switzerland, Feb. 7, 2011 — Smaller and more energy-efficient electronic chips could be made using molybdenite, a material developed in Switzerland. EPFL's Laboratory of Nanoscale Electronics and Structures (LANES) published a study showing that this material has distinct...
Laser Imaging System Screens Nanotubes WEST LAFAYETTE, Ind., Nov. 22, 2010 — Researchers have demonstrated a new imaging tool for rapidly screening structures called single-wall carbon nanotubes, possibly hastening their use in creating a faster and more energy-efficient class of computers and electronics. The semiconducting...
Graphene Gets a Teflon Makeover MANCHESTER, England, Nov. 9, 2010 — University of Manchester scientists have created a new material which could replace or compete with Teflon in thousands of everyday applications, including new types of LED devices. Professor Andre Geim, who along with his colleague Professor Kostya...
H2O May Hold Answer to Graphene Nanoelectronics TROY, N.Y., Oct. 29, 2010 — Researchers at Rensselaer Polytechnic Institute developed a new method for using water to tune the band gap of the nanomaterial graphene, opening the door to new graphene-based transistors, nanoelectronics, nanophotonics and other applications. ...
Nobel Winners Used Keithley CLEVELAND, Oct. 25, 2010 — Keithley Instruments Inc., which specializes in advanced electrical test instruments and systems, congratulates Drs. Andre Geim and Konstantin Novoselov, scientists at the University of Manchester in England, who were just awarded the 2010 Nobel...
Graphene Pioneers Share Physics Nobel STOCKHOLM, Oct. 5, 2010 — Two Russian expatriates who discovered graphene — the thinnest and strongest form of carbon known — were honored Tuesday with the 2010 Nobel Prize in Physics by the Royal Swedish Academy of Sciences.
Scope Reveals New Physics of Graphene GAITHERSBURG, Md., Sept. 8, 2010 — Using a one-of-a-kind scanning-probe microscope, an international team of researchers discovered that electrons in graphene, which comprise four quantum states, can split into different energies when exposed to extremely low temperatures and...
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