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Posts with tag nanowires

Researchers get one step closer to all-nanowire sensors

The latest in nanowire research has a crew at the University of California, Berkeley creating the very first integrated circuit "that uses nanowires as both sensors and electronic components." By utilizing a so-called "simple" printing technique, the researchers were able to create a batch of uniform circuits that could one day serve as image sensors. According to Ali Javey, an electrical-engineering professor at the institution, the goal is to "develop all-nanowire sensors" which could be used in a wide array of applications, and the benefit of using 'em is their exceptionally high level of sensitivity. In due time, the gurus would like to make everything on the circuit printable, though we have this strange feeling we won't be seeing any actual results from all of this for years to come.

MIT fabricates nanowire mats to selectively absorb oil


A team of astute MIT researchers have developed a sophisticated new material that could help control, contain and lessen the environmental impact of future oil spills. The creation is a mat of nanowires that actually looks a lot like paper, but unlike the material your paycheck gets printed on, this stuff can "selectively absorb hydrophobic liquids (oil-like liquids) from water." We're talking about a membrane that can "absorb up to 20 times its weight in oil, and can be recycled many times for future use." Outside of this, it could also be used in water filtration processes and for designing the next great wetsuit. Okay, so we're making that last one up, but don't dare say it's beyond the realm of possibility.

[Via NewScientist]

Researchers develop copper nanowires for field-emission displays

It's been a little while since we've heard of any significant progress in field-emission displays, but a group of researchers at the University of Illinois in Urbana Champaign now seem to be shaking things up a bit, with them touting new copper nanowires that could one day be used for ultra-thin FED screens. Specifically, the copper nanowires developed by Kyekyoon Kim and Hyungsoo Choi are between 70 nanometers and 250 nanometers wide, and can be "grown" on various surfaces including silicon, glass, metal, and plastic. As Technology Review reports, in the case of field-emission displays, the nanowires would be used to fire electrons at phosphor particles on a screen to light them up. That process would result in displays that are not only thinner than traditional flat-panel displays, but brighter and more energy-efficient as well -- assuming they ever find their way out of the lab, that is.

Researchers hope to charge up gadgetry with body heat


We've heard of firms tinkering with the idea of converting excess heat directly to energy, and apparently, a team of scientists from the US Department of Energy's Lawrence Berkeley National Laboratory and the University of California at Berkeley have done just that. Oddly enough, the researchers admit that they're still unclear on how their findings actually work, but they've nevertheless discovered how to increase the conversion efficiency of converting waste heat to energy "by a factor of 100." The authors of the report suggest that clothing constructed of material embedded with thermoelectric modules could one day "recharge mobile electronic devices off the heat of one's body," and while we're certainly stoked about the idea, we're already conjuring up awful images in our minds about what this garb will actually look like.

[Via textually, image courtesy of FourEyesJokeShop]

Stanford's nanowire battery leapfrogs Li-ion


Stanford claims its latest advances in silicon nanowires have it building batteries with 10 times the capacity of existing Li-ion cells. Apparently people have been trying to stuff silicon -- which has a much higher capacity than existing materials -- into a battery for decades, but since it swells when charged with positively charged lithium and shrinks during use, the silicon has a tendency to "pulverize." Who knew batteries could be so dramatic? Oh, right. The advancement at Stanford, led by Yi Cui, builds the battery in the form of silicon nanowires, giving the silicon room to grow and shrink without damage. A patent is being filed, and Yi Cui is already considering forming a company or licensing the tech to a manufacturer.

Silicon nanowire could convert light into electrical energy

Nanoelectonic devices have to have juice too, and thanks to a team at Harvard University, extraordinarily minuscule gizmos of the future could be powered via a "silicon nanowire that can convert light into electrical energy." The device itself is said to look much like a typical coaxial cable, but it's around 100,000 times smaller and shuns metal in favor of "silicon with three different types of conductivity arranged as layered shells." Reportedly, a single strand can output "up to 200-picowatts," which won't move much, but it could be just enough to run ultralow power electronics that could be worn on, or even inside, the body. Hopefully they'll have this all ironed out by the time we need a pacemaker.

[Image courtesy of Harvard]

Nanowires developed to retrieve data on the double

Those fond of how quickly flash memory reads and writes their data are sure to adore the research that a few University of Pennsylvania scientists have been working on, as Ritesh Agarwal (pictured) and colleagues have crafted "nanowires capable of storing computer data for 100,000 years and retrieving that data a thousand times faster" than existing micro-drives. Moreover, the "self-assembling nanowire of germanium antimony telluride" consumes less energy and space than current memory technologies, and even Agarwal stated that the "new form of memory has the potential to revolutionize the way we share information, transfer data and even download entertainment." Unfortunately, there seems to be no word on if (or when) this creation could be headed to the commercial realm.

Georgia Tech researchers develop environmentally-powered nanogenerators

While the school of the Ramblin' Wreck may be best known for its barrage of engineering graduates, the university has been on quite the medical trip of late, as researchers have reportedly developed a nanometer-scale generator after already cranking out nanowires that monitor your blood pressure. The aptly-named nanogenerators can produce "continuous direct-current electricity by harvesting mechanical energy from such environmental sources as ultrasonic waves, mechanical vibration or blood flow," which translates into easy energy for implanted and worn medical gadgetry of the future. Interestingly, the project was funded by the likes of the National Science Foundation and our pals at DARPA, and while this invention may not quite match up with wireless charging (hey, we're scared of hospitals), the concept is novel nonetheless. So if you were hoping that dreams of implanted analysis of your vitals would suddenly cease, things aren't looking up for you.

[Via MedGadget]

Georgia Tech researchers design nanowires to monitor blood pressure

If you see yourself taking an unwanted trip to the ER anytime in the next decade or so, there's a fairly decent chance you'll end up with at least one or two creepy creatures perusing some aspect of your innards. As if mechanical beings cruising through your intestines wasn't eerie enough, a team of Georgia Tech researchers have proposed a new way to constantly monitor one's blood pressure. The aptly-dubbed nanowires take advantage of the "piezoelectric effect in semiconducting zinc oxide" in order to detect minute forces as tiny "as a few piconewtones," or about the same amount needed to unzip a strand of DNA. The specially designed sensors will purportedly enable robotic nurses to continually monitor your blood pressure to take action before things get too out of hand, and of course, the "biocompatible "system would beam results wirelessly to devices in hospitals or even wrist-mounted readers so you'd know when to pop a proverbial chill pill. This should definitely suffice as a "second opinion," eh?

Breakthrough in ferroelectric materials could enable million-GB thumbdrives

While we have to agree with certain Engadget readers who feel that 640KB of RAM is plenty for most computing tasks, those darn scientists just keep looking for ways to stuff more and more data into smaller spaces. The latest breakthrough on the storage tip comes courtesy of researchers from Drexel and Penn, who have found a way to stabilize the simple physical property of ferroelectricity at the nano scale, making possible such obviously unnecessary densities as 12,800,000GB per cubic centimeter. Ferroelectric materials are usable as memory because they possess the ability to switch electric charges in so-called dipole moments, but before Drexel's Dr. Jonathan Spanier and colleagues decided to embed the materials in water, it had previously been impossible to screen those dipole moments at scales small enough to be useful. Don't expect to be able to buy a zillion gig, water-filled iPod anytime soon, though, as the research team still faces significant hurdles in actually assembling the nanowires that would make up such a drive with the proper density as well as developing a method of efficiently reading and writing data.

Nanogenerators turn you into a duracell

For anyone who thought gyms with workout equipment that generate electricity were a good idea, prepare to be one-upped. Researchers at the Georgia Institute of Technology are working on metallic nanowires as nanogenerators that transform bodily kinetic energy into pure electricity. We were all thinking, oh, sweet, power-generating nanotech clothes. Naw dude, these peeps want to implant the nanogenerators right in your corporeal form for maximum energy output. Thought your mom got mad when you got a tattoo or piercing? Try explaining subcutaneous power generating zinc oxide nanowires.



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