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Researchers develop tiny, autonomous piezoelectric energy harvester
Folks have long been using piezoelectric devices to harvest energy in everything from dance floors to parking lots, but a group of European researchers have now shown off some novel uses for the technology at the recent International Electron Devices Meeting that could see even more of the self-sufficient devices put to use. Their big breakthrough is that they've managed to shrink a piezoelectric device down to "micromachine" size, which was apparently possible in part as a result of using aluminum nitride instead of lead zirconate titanate as the piezoelectric material, thereby making the devices easier to manufacture. Their first such device is a wireless temperature sensor, which is not only extremely tiny, but is able to function autonomously by harvesting energy from vibrations and transmit temperature information to a base station at 15 second intervals. Of course, the researchers say that is just the beginning, and they see similar devices eventually being used in everything from tire-pressure monitoring systems to predictive maintenance of any moving or rotating machine parts.
Resin replaces ITO in latest flexible OLED prototype
Make no mistake, wrapping your mind around the build of an OLED panel is mighty tough to do. Without getting you mired in technobabble, let's just say that indium tin oxide (ITO) has generally been a mainstay in every single OLED that was produced commercially. Now, a team of researchers from AGFA-Gevaert, IMEC, Holst Centre and Philips have prototyped a 12- x 12-centimeter flexible OLED lighting panel that swaps out the ITO for highly-conductive transparent resin electrodes. You see, it's been difficult for OLED builders to secure enough electrical conductivity of ITO in a low-temperature process, and this new methodology is perfectly suited for the coating method (which makes it ripe for printing). The resin itself is being dubbed Orgacon, and tests have shown it to have a 6x improvement over ITO in terms of electrical conductivity. Beyond that, the crews are keeping the secrets safe from the poachers of the world, but here's hoping this amounts to more than just jovial celebration in a far off laboratory.[Via OLED-Display]
ExoFly: Mars' first tourguide
You know those insect-like micro air vehicles (MAV) we've been seeing? Well, the ExoFly aerobot is based on that camera-equipped DelFly design, only this time it's gearing up for a trip to Mars -- maybe even Titan or Venus. Turns out flapping-wing flight is perfect for the low-density Martian atmosphere. The current prototype -- weighing 17g with a wingspan of 350mm and flight time of twelve minutes -- is being tweaked for use in future missions to Mars. The folks at Delft University of Technology and Wageningen University, who've teamed up with Ursa Minor Space & Navigation, plan on increasing the weight to 20g and adding an on-board solar cell, which they reckon should extend the flight distance to 15km. There's also talk of using the digital terrain and image data gathered to simulate a 3D immersive environment for detailed analysis of extraterrestrial destinations -- hopefully viewable by those of us who don't have the billions to drop on a flight to Mars.[Via New Scientist Space]
