nanocrystal
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USC develops printable liquid solar cells for flexible, low-cost panels
Solar cells are becoming more viable sources of energy -- and as they become more efficient, they're only getting smaller and cheaper to produce. Liquid nanocrystal cells are traditionally inefficient at converting sunlight into electricity, but by adding a synthetic ligand to help transmit currents, researchers at USC have improved their effectiveness. The advantage of these liquid solar cells? They're cheaper than single-crystal silicon wafer solutions, and they're also a shockingly minuscule four nanometers in size, meaning more than 250 billion could fit on the head of a pin. Moreover, they can be printed onto surfaces -- even plastic -- without melting. Ultimately, the goal of this research is to pave the way for ultra-flexible solar panels. However, the scientists are still experimenting with materials for constructing the nanocrystals, since the semiconductor cadmium selenide they've used thus far is too toxic for commercial use.
Berkeley Lab scientists create nanocrystal hydrogen storage matrix, could make for H2 batteries
If you could run your celly on hydrogen you'd have power for days and days -- but, you'd also need to lug around a high-pressure tank to store the stuff. That's no fun, and that's why we're still using Li-ion batteries and the like. But, scientists at the Lawrence Berkeley National Laboratory look to have found a way to possibly ditch the tank, creating a gas-barrier polymer matrix out of polymethyl methacrylate, allowing the H2 gas in but keeping oxygen and everything else out. That matrix contains magnesium nanocrystals that react with the hydrogen to form MgH2, enabling safe, (relatively) low-pressure storage. The H2 can then be released again and the magnesium nanocrystals are freed to bond with another batch of H2 when refilled. It sounds a little like the Cella Energy hydrogen storage solution, but a bit more promising if we're honest. Now for the long, painful wait for this to come to production.
Fujitsu's quantum dot laser fires data at 25Gbps, not just for show
Fujitsu just announced what's reportedly the world's first quantum dot laser capable of 25 gigabits per second of data transmission. Go on -- there's no need to hold your applause. Now, we've seen lasers beam packets at 1.2 terabits per second over miles of open ground, and up to 15.5Tbps through a fat optical pipe, so why would a measly 25Gbps attract our attention? Only because we hear that the IEEE is hoping to create a 100Gbps ethernet standard by 2010 (that's now!) and four of Fujitsu's new nanocrystal lasers bundled together just so happen to fulfill that requirement. It also doesn't hurt that the company's quantum dot solution reportedly uses less electricity than the competition, and that Fujitsu has a spin-off firm -- QD Laser -- champing at the bit to commercialize the technology. All in all, this tech seems like it might actually take off... assuming early adopters are more successful than major corporations at deploying the requisite fiber. Either that, or we'll just enjoy some seriously speedy displays and external drives, both of which sound downright delightful in their own right.
Nanocrystal breakthrough promises more versatile lasers, world peace
For the longest while, scientists have been flummoxed by the incessant coruscating emitted by individual molecules; no matter their methods, they could never quite seem to overcome a troubling optical quirk known sensibly as "blinking." Thanks to a brilliant crew at the University of Rochester, however, we now understand the basic physics behind the phenomenon, and together with a team from Eastman Kodak, a nanocrystal has been created that can constantly emit light. In theory, the discovery could lead to "dramatically less expensive and more versatile lasers, brighter LED lighting, and biological markers that track how a drug interacts with a cell at a level never before possible." Indeed, one could envision that future displays could be crafted by painting a grid of differently sized nanocrystals onto a flat surface, making even OLED TVs look chubby in comparison. Now, if only we had a good feeling that such a device was destined for a CES in our lifetime...
