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World's smallest battery uses a single nanowire, plant-eating virus could improve Li-ion cells tenfold
When it comes to building better batteries, building electrodes with greater surface area is key, and scientists are looking to exotic methods to attract the tiny particles they need. We've already seen graphene and carbon nanotubes soak up those electrons, but the University of Maryland has another idea -- they're using the Tobacco mosaic virus (TMV) to generate usable patterns of nanorods on the surface of existing metal electrodes. By simply modifying the germ and letting it do its thing, then coating the surface with a conductive film, they're generating ten times the energy capacity of a standard lithium-ion battery while simultaneously rendering the nasty vegetarian bug inert. Meanwhile, the Center for Integrated Nanotechnologies (CINT) at Sandia Labs was more curious how these tiny charges actually work without confusing the forest for the trees, so to speak, so a team of scientists set about constructing the world's smallest battery. Using a single tin dioxide nanowire as anode, a chunk of lithium cobalt dioxide as cathode, and piping some liquid electrolyte in between, they took a microscopic video of the charging process. See it in all its grey, goopy glory right after the break.
Two universities adopt Wii Fit to monitor football concussions
As it turns out, there are quite a few uses for a $100 off-the-shelf computerized scale, above and beyond getting fit -- Nintendo's Wii Balance Board is now providing a mechanism by which college football teams at Ohio State University and the University of Maryland can cheaply determine whether players are suffering from concussions. Taking the place of force plate machines that can cost tens of thousands of dollars, the white plastic boards measure students' balance (using yoga poses) and coordination (in Table Tilt) before a game, to provide a frame of reference against which trainers can measure whether athletes are fit to keep playing. Though some scholars found Wii Fit didn't stack up favorably against the expensive force plates, the universities trialing the system called it "pretty decent," so the question is whether Nintendo's peripheral offers a reasonable enough benchmark for the price. We suppose the American Heart Association liked it well enough.
EATR's engine officially complete, and this robot's one step closer to reality
If you're anything like us, you've probably been keeping pretty close tabs on EATR, the biomass-to-power robot that's been making people nervous for some time now. Well, EATR's engine -- which is being built by Cyclone Power Technologies -- is complete, and the drone is now one giant leap closer to living in actual reality with us. The completed steam engine, called WHE, is a six-cylinder external heat engine which can generate up to 18 horsepower of mechanical power. As previously clarified by EATR's makers (a project that's getting help from the University of Maryland and DARPA), the robot will not feed on things like animals... or humans. No, this is no zombified drone -- EATR will harvest only plant matter for energy -- which, if you ask us, makes the whole thing much more mundane. Regardless, we'll be keeping our eyes on this project as it moves forward. The full press release is after the break.
NC State gurus develop new material to boost data storage, conserve energy
We've all assumed that anything's possible when dabbling in the elusive realm of spintronics, and it seems as if a team at NC State University is out to prove just that. While using their newfound free time on Saturdays (you know, given that the football team has quit mid-season), Dr. Jagdish Narayan and company have utilized the process of selective doping in order to construct a new type of metallic ceramic that could be used to create a "fingernail-size computer chip to store the equivalent of 20 high-definition DVDs or 250 million pages of text." The material could also be used (in theory, anyway) to create a new generation of ceramic engines that could withstand twice the heat of normal engines and hit MPG ratings of 80. Granted, this all sounds like wishful thinking at the moment, but we wouldn't put it past the whiz kids in Raleigh to bring this stuff to market. Too bad the athletic director doesn't posses the same type of initiative. [Thanks, Joel]
US physicists build teensy 2D cloaking device
Drop what you're doing, friend. Cloaking devices are real now, meaning all we need are force fields and some spandex jumpsuits and we'll be bonafide dwellers of the future. The good news comes to us from physicists at the University of Maryland, lead by Igor Smolyaninov, who successfully cloaked a 10 micron gold ring by bending two dimensions of visible light. This follows up successful research last year that had worked out an invisibility cloak in the electromagnetic spectrum, but is still a far cry from a true 3D cloaking device, since such an object would have to bend light waves both magnetically and electronically simultaneously -- this 2D model is just pushing around "surface plasmons" created out of the light waves. While the tech probably won't make the jump to 3D cloaking, it might be used in computer chips or as a replacement for fiber optics some time down the road, which we suppose is alright.
