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graphene News
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.
Conscripting Terahertz Sensors
Apr 1, 2012 — Imaging and spectroscopy in the terahertz frequency range eventually will give troops a welcome advantage in the field. Terahertz waves are short enough to provide resolution of less than 1 mm, yet long enough to penetrate most nonmetallic...
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...
One-step process turns carbon fibers into graphene QDs
HOUSTON – Common carbon fiber can be turned into graphene quantum dots (QDs) in a one-step chemical process that is much simpler than established techniques. This discovery could prove useful for optical, biomedical and electronic applications. ...
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...
Tunable graphene device puts terahertz to work
BERKELEY, Calif. – A microscale graphene device that responds strongly to terahertz light and that can be precisely tuned is the first tool in a kit for putting terahertz light to work. At the heart of the device, developed by scientists at Lawrence Berkeley...
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...
Hybrid graphene films could lead to flexible displays
HOUSTON – Graphene-based electrodes could revolutionize touch-screen displays, LED lighting and solar panels, bringing flexible, transparent electronics closer to reality. The thin films created in the lab of Rice University chemist James Tour combine a...
One-atom-thick optical devices proposed
PHILADELPHIA – One-atom-thick metamaterials that can now be made by controlling the conductivity of sheets of graphene could have wide applications in imaging, signal processing and telecommunications. The study of metamaterials is based on the idea that...
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...
Graphene optical modulators could speed communications
BERKELEY, Calif. – A new optical device that uses graphene to switch a light on and off could soon break digital communication speed limits. The switching ability is the fundamental characteristic of a network modulator, which controls the speed at which data packets...
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...
Synchrotron enables faster, better tissue imaging
MILWAUKEE – A synchrotron-based imaging technique delivers intensity a million times brighter than sunlight – and offers high-resolution pictures of the molecular composition of tissues with high speed and quality. A team of researchers from 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...
Photonics marches steadily forward in southern climes
TONANTZINTLA, Mexico – Photonics research and development occurs all over the world, but in North America it is chiefly in the US and Canada that the industry flourishes. That said, all is not quiet in Mexico and its neighbors to the south. Throughout Mexico and Central...
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...
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June 2024
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