SilverInk
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Georgia Tech engineers pull energy out of atmospheric hat, go on electromagnetic scavenger hunt
Mankind's about to plunge into the depths of a wireless sensor-powering ether binge -- braincell annihilating vapors not included. Spearheaded by Georgia Institute of Technology's professor Manos Tentzeris and his engineering team, this ambient energy scavenging tech harnesses electromagnetic frequencies in the 100MHz - 15GHz range -- anything from your FM car radio to radar -- and converts it into a useable DC power source. So, it's free energy -- kind of. The cheap, self-powering paper or flexible polymer-based sensors are created using standard inkjet printers and Tentzeris' "unique in-house recipe" of circuit-building silver nanoparticles. Current testing hasn't yet yielded significant enough wattage to power your PS3 Slim, but it could soon via the help of supercapacitors and future solar cell integration. Imagine clothing embedded with health-monitoring biometric sensors, airport security run by something other than aloof TSA agents, or even spoilage-aware drink cartons -- milk that tells you when it's gone sour. The invisible radio band-charged possibilities are endless, but with storage still in the microwatt to one milliwatt range, it's more concept than solid vaporware reality.
New silver-packing transparent conductive film could mean more durable touchscreens
We first heard of the wonders of silver ink back in 2009, but it wasn't until earlier this year, with talk of 3M's new capacitive touchscreens, that we experienced its real-world potential for display technology. Well, it looks like 3M's not the only name in the Ag game, in fact Tokyo-based Toray Industries recently announced the development of a transparent conductive film that ditches the traditional ITO (indium tin oxide) for silver wire. In order to produce this new material, a layer of Ag wires, measuring several hundred nanometers, is applied to a polyester (PET) film by way of a wet method. The result, the company said, is a more flexible, durable, and transparent film that is well suited to touchscreens of just about any size. There's no word yet on when the film will appear on real-deal devices, but we'll definitely keep an eye out for the silver screens. Full PR after the break.
Nanoparticle inks print 3D antennas 'orders of magnitude' better than your boring 2D antenna
If you want better cellphone reception it's time to go small or go home, with researchers at the University of Illinois coming up with a nanoscale printing technique that allows for the creation of so-called 3D antennas. Of course, unless you're hunting for signal in Flatland all antennas are to some degree three-dimensional, but these suckers are printed using nanoparticle silver ink onto a curved substrate, as shown up yonder. The resulting components "exhibit performance metrics that are an order of magnitude better than those realized by monopole antenna designs." In fact these creations are said to approach the Chu-Harrington Limit of theoretical performance in an antenna. Most important? They look pretty darned cool. Shame they'll likely find themselves tucked away inside of a device's chassis -- whenever they actually go into production.
Xerox announces silver ink, keeps printable electronics dream alive
Here comes Xerox, huffing and puffing its way back from obscurity with what it believes is a revolutionary new advancement. Its brand new silver ink and related printing technologies promise to make it possible for the lazy or breadboard handicapped among us to print their own circuit boards atop plastics, film, and even textiles. The wizardry of it lies in the company's development of a metallic ink with a melting point lower than that of plastics, which allows the former to be laid (in liquid form) atop the latter. It's all very neat, and the potential for flexible, lightweight, disposable electronics is well and good, but haven't we heard this all before?
