biosensor
Latest
Scientists build soft, transparent contact lens displays with nanomaterials
Of the contact lens display prototypes that we've seen so far, few if any are focused on comfort -- a slight problem when they're meant to sit on our eyeballs. A collaboration between Samsung and multiple universities may solve this with display tech that's meant to be cozy from the start. By putting silver nanowires between graphene layers, researchers have created transparent conductors that can drive LEDs while remaining flexible enough to sit on a contact lens. Current test lenses only have one pixel, but they're so soft that rabbits can wear them for five hours without strain. Scientists also see the seemingly inevitable, Glass-like wearable display as just one development path -- they're working on biosensors and active vision correction. While there's still a long way to go before we reach a cyberpunk future of near-invisible displays, we may finally have some of the groundwork in place.
Biosensor cradle makes your iPhone into a spectrometer
Researchers at the University of Illinois in Urbana-Champaign have created a US$200 piece of hardware that turns any iPhone into a high-resolution spectrometer. The device allows the user to test for pathogens, toxins, allergens in food and perform medical diagnostic tests. The device is essentially a cradle with different lenses and filters. Users put a microscope slide into the cradle and line it up with the iPhone's camera and the additional lenses or filters. The companion app measures the white fluctuations, which allows it to analyze the substance under the lens. What's amazing is this entire solution costs only $200 and is just as accurate as $10,000 machines used in laboratories currently. Now that the researchers know the device works, they are currently working to add functionality to it, such as vitamin A and D testing, which will enable medical practitioners in developing countries to cheaply and easily test a patient's levels to help make sure they are getting the proper nutrition that will help children develop properly.
iPhone biosensor cradle brings us one step closer to having tricorders (video)
It seems like every day we're getting a little bit closer to having tricorders, and today's no exception. Researchers at the University of Illinois at Urbana-Champaign have designed hardware and software that turns the iPhone into a powerful biosensor that's useful for toxin and pathogen testing as well as medical diagnosis. The package consists of a cradle that contains an assortment of lenses and filters which line up with the handset's camera, along with an app that guides the user through the testing process. At the core of the device is a photonic crystal slide which basically turns the iPhone into a high-resolution spectrometer. While the cradle only contains about $200 worth of parts, it's just as accurate as laboratory equipment costing tens of thousands of dollars, with the added bonus of being hand-held. The team just received an NSF grant to explore other applications for the device and is working on a cradle for Android phones. Hit the break for a demo video and a peek into the future.
Virus-based sensors find superbugs in minutes, may lead to safer surfaces
Viruses usually have to be rendered inert to work in humanity's favor, as anyone who has received a flu shot can attest. Auburn University has bucked that trend by discovering a way to put active viruses to work in not only diagnosing sickness, but in preventing it in the first place. It's using bacteria-hating (and thankfully harmless) viruses as biosensors to quickly identify superbugs, or antibiotic-resistant bacteria that can sometimes prove fatal. As the viruses change color once they've reached impervious bacterial strains, in this case variants on Staphylococcus, they can reveal superbugs within 10 to 12 minutes -- a potentially lifesaving interval when current purification-driven methods can take hours. Auburn would like to eventually use what it has learned to develop more effective antibacterial glass and similar surfaces. If successfully put into practice, either breakthrough could mitigate what's already a major medical crisis. [Image credit: Bob Blaylock, Wikipedia]
New sensor can read your heart from afar, but knows not your feelings
Are you fed up with your current ECG sensor? Tired of all the mess of electroconductive gels, sticky electrodes and tangled wires? How about this: Britain's Plessey Semiconductors offers an ECG sensor that promises heart-monitoring without the hassle. We've seen similar technology before, but according to the company, the Electric Potential Integrated Circuit -- or EPIC, as it's humbly called -- can read heartbeats even through a sweater; future versions might be embedded in hospital gurneys for constant, unobtrusive monitoring. Like an extremely sensitive voltmeter, it detects tiny changes in electric fields, which means it could also be used for Kinect-style motion interfaces. The company even imagines a future system where firefighters can use the EPIC to find humans in a smoke-filled room. If you're thinking, "My, that sounds just like my Deus Ex dreams" -- hey, we're right there with you.
Implantable antenna designed using silk and gold
Silk: it's stronger than Kevlar, thinner than a human hair, it's biocompatible (it doesn't trigger human immune system response), and it's produced by insects (although some new-fangled metabolically engineered bacteria seem to be up to the task). Researchers at Tufts University have created a silk and gold biosensor that can be implanted in the body to keep tabs on proteins and chemicals. One possible use would be to keep track of diabetic's glucose levels, notifying the patient when things go wonky. At the present time, they've only tested the antenna itself -- it was found to resonate at specific frequencies, even when implanted in several layers of muscle tissue (from a pig, mind you). For their next trick, the team will outfit the device with proteins or other molecules to monitor in-vivo chemical reactions.
RF-ECG biosensor kit enables wireless medical monitoring
The kit recently unveiled by the Medical Electronic Science Institute most certainly has some homegrown competition, as it too seeks to record and wirelessly transmit "ECG signals and motion, as well as heart rate and epidermal skin temperature" to mobile phones or PCs. The body-worn sensor utilizes "low power consumption RF transmission," which purportedly enables it to broadcast a constant signal for "up to 48 hours" on a single charge. Notably, the kit includes a "USB receiver, sensor transmitter, lithium battery, electrode sheet and software," but no price seems to be given. Oh, and hit the read link for a quick video of the package in action.[Thanks, Fran]
Brain-reading biofeedback caps on the rise, NeuroSky returns
Pushing the envelope is what it's all about, and for companies cranking out Wiimote-like devices to make gaming and PC experiences more eventful, even that's not enough to satisfy a bevy of outfits with their eyes set on getting biofeedback into games. Companies such as Emotiv Systems, CyberLearning, and our old friend NeuroSky are all looking to take advantage of the public's current curiosity about thought-controlled (and influenced) gaming by offering up electrode-laced headsets that read a variety of brain impulses to effect gameplay. Essentially, these gel-free caps rely on technology such as electromyography (EMG), which records twitches and other muscular movements, and electrooculography (EOG), which measures changes in the retina, in order to change the way games are experienced. For instance, a nervous, uneasy GTA player would barely be able to aim at his / her enemies, while a daydreamer would have a hard time staying on course and reaching full speed while playing Gran Turismo. Unsurprisingly, said companies have noted that "finding their target markets" have been the most difficult aspect, and certain analysts rightfully question whether gamers would actually enjoy such "mentally taxing restrictions" on their games, but if all goes as planned, we should start seeing a few more options in the commercial brain-interface market before too long.