Monday, August 3, 2009
From graphene to graphane, now the possibilities are endless
Ever since graphene was discovered in 2004, this one-atom thick, super strong, carbon-based electrical conductor has been billed as a "wonder material" that some physicists think could one day replace silicon in computer chips.
But graphene, which consists of carbon atoms arranged in a honeycomb lattice, has a major drawback when it comes to applications in electronics – it conducts electricity almost too well, making it hard to create graphene-based transistors that are suitable for integrated circuits.
In August's Physics World, Kostya Novoselov - a condensed-matter physicist from the Manchester University group that discovered graphene -- explains how their discovery of graphane, an insulating equivalent of graphene, may prove more versatile still.
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But graphene, which consists of carbon atoms arranged in a honeycomb lattice, has a major drawback when it comes to applications in electronics – it conducts electricity almost too well, making it hard to create graphene-based transistors that are suitable for integrated circuits.
In August's Physics World, Kostya Novoselov - a condensed-matter physicist from the Manchester University group that discovered graphene -- explains how their discovery of graphane, an insulating equivalent of graphene, may prove more versatile still.
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U.S. Navy Shoots Down Target Missile in Space
The U.S. Navy and Missile Defense Agency (MDA) successfully shot down a short-range ballistic missile in space in a July 30 test, agency officials announced Friday.
The Navy's USS Hopper and USS O'Kane destroyers detected and tracked a missile fired from the Pacific Missile Range Facility at Barking Sands, Kauai in Hawaii during the test, which was latest demonstration of the U.S. military's Aegis Missile Defense system.
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The Navy's USS Hopper and USS O'Kane destroyers detected and tracked a missile fired from the Pacific Missile Range Facility at Barking Sands, Kauai in Hawaii during the test, which was latest demonstration of the U.S. military's Aegis Missile Defense system.
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New Microbe Strain Makes More Electricity, Faster
In their most recent experiments with Geobacter, the sediment-loving microbe whose hairlike filaments help it to produce electric current from mud and wastewater, Derek Lovley and colleagues at the University of Massachusetts Amherst supervised the evolution of a new strain that dramatically increases power output per cell and overall bulk power. It also works with a thinner biofilm than earlier strains, cutting the time to reach electricity-producing concentrations on the electrode.
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Navy awards laser development contract
The U.S. Navy has contracted Applied Energetics Inc. to design and develop a laser technology for deployment with Marine Corps and naval aircraft.
U.S. company Applied Energetics was selected by the Navy to develop an Ultra-Short Pulse laser system. Under the $992,000 contract, Applied Energetics will be expected to develop a demonstration system to explore Ultra-Short Pulse laser effects.
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U.S. company Applied Energetics was selected by the Navy to develop an Ultra-Short Pulse laser system. Under the $992,000 contract, Applied Energetics will be expected to develop a demonstration system to explore Ultra-Short Pulse laser effects.
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New Armored Ride Will Protect Troops From IEDs in Afghanistan
July was the deadliest month for U.S. troops in Afghanistan since the war began. Fortunately, after nearly eight years of fighting, Army infantry and Marines in Afghanistan will finally be getting a new vehicle that is designed to meet the challenges of the theater.
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Launch Your Own Personal Satellite
Ever wanted to launch your own satellite into low earth orbit, then track it on ham radio for a few weeks before it burns up on re-entry? Well, 52 years after the launch of Sputnik, you can. Interorbital Systems is offering YOU the chance (by the end of 2010) to send up a TubeSat Personal Satellite Kit for the low introductory price of just $8,000.
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Tiniest two-photon MEMS microscope performs brain imaging
Researchers at Stanford University (Stanford, CA) have developed an incredibly small two-photon microscope imager that uses a microelectromechanical systems (MEMS) laser-scanning mirror to image (v) the brain of a mouse.
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Ultrafast grows as lasers shrink
Many of the technical papers and product announcements at recent industry conferences serve to underscore the considerable engineering and design effort being undertaken by laser makers toward making femtosecond pulses more accessible to a broader community and of end users. And as the lasers are gradually becoming easier to use and more reliable, the payoff is being seen in fields as diverse as biophotonics and materials processing.
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Raytheon Secures Prime Development Contract for Advanced Airborne Sensor
The U.S. Navy has awarded a multi-year contract authorizing Raytheon Company (NYSE: RTN) to begin development of the Advanced Airborne Sensor, the follow-on to the Littoral Surveillance Radar System (LSRS).
The AAS program will equip the P-8A Poseidon, the Navy's next patrol maritime aircraft. LSRS is currently operational on Navy P-3C Orions; the AAS will provide airborne radar surveillance with next-generation line-of-site capability.
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The AAS program will equip the P-8A Poseidon, the Navy's next patrol maritime aircraft. LSRS is currently operational on Navy P-3C Orions; the AAS will provide airborne radar surveillance with next-generation line-of-site capability.
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