Pictured here are three wireless devices that use carbon nanotubes (CNTs) to achieve high sensitivity to ammonia. At left is a patch antenna, inkjet-printed on photographic paper, with the CNTs shown in black. At top center is an omni-directional segmented loop antenna on a soft substrate, designed for potential 5.8 GHz RFID integration. At bottom right is an inter-digitated capacitor on silicon substrate with CNT loading across the electrodes, being tested for its DC resistance. (Georgia Tech Photo: Gary Meek.)
Homeland security is going to be an increasingly important sector for design engineers. One thing that's lacking is turnkey solutions which bundle everything from the sensor to the software to the under interface to the packaging and deployment. (For an interesting development in that regard, in the airport perimeter security realm, see a story I did a while back on some IBM work -- "IBM Patenting Airport Security Profiling Technology.")
That said, this sensor is a great advance in terms of applicability to portable devices.
What am I missing? If the sensor requires a special printer and special ink cartridges, what is the advantage over standard manufacturing? Or is the idea that the military (or whoever) would purchase their own printer / "ink" and make the items onsite?
That's a good question, Beth. The researchers hope to spin off a company to build a manufacturing facility. While startup costs could run into the millions, once that's accomplished, printing the sensors would be fast and inexpensive.
I can see some value in such a sensor, and it certainly is a great invention. Unfortunately it would not be able to detect any of the non-ammonia based explosives, of which there are many. For example, consider plain old gunpowder, using a potasium based compound, and nitroglyceren , and that old military standby "C4". So while it is a great contribution, it does not end the problem. Aside from that, there is an easy and simple way to render the sensor useless. But I won't describe that method at all.
This may become a great product and very IMPORTANT one. We need to doall we can to support and help our troops. This is a very nice idea, but clearly it is important to isolate the amonia from regular uses and minimize errors.
Given the toll that IEDs have had on troops and civilians, this seems like a technology that could have some real life-saving impact. I'm curious, though if specialized ink-jet printers and photographic paper limit production to a laboratory scale, how realistic is it that these sensors can really make a different in sniffing out dangerous explosives?
Earlier this year paralyzed IndyCar drive Sam Schmidt did the seemingly impossible -- opening the qualifying rounds at Indy by driving a modified Corvette C7 Stingray around the Indianapolis Motor Speedway.
Wearables are changing the way we see ourselves. With onboard sensors that have access to our bodies, we are starting to know our physical selves like never before, quantifying our activity, our heart rate, breathing, and even our muscle effort.
Last week, the bill for reforming chemical regulation, the TSCA Modernization Act of 2015, passed the House. If it or a similar bill becomes law, the effects on cost and availability of adhesives and plastics incorporating these substances are not yet clear.
This year, Design News is getting a head start on the Fourth of July celebration. In honor of our country and its legacy of engineering innovation -- in all of its forms -- we are taking you on an alphabetical tour through all 50 states to showcase interesting engineering breakthroughs and historically significant events.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.