Nanotech Electronic Nose Sniffs Explosives Like Dogs
A new handheld device can sniff out vapors from explosives as well as the best-trained dogs.
( Free-Surface Microfluidics/Surface-Enhanced
Raman Spectroscopy for Real-Time
Trace Vapor Detection of Explosives)
“Dogs are still the gold standard for scent detection of explosives. But like a person, a dog can have a good day or a bad day, get tired or distracted,” said Meinhart. “We have developed a device with the same or better sensitivity as a dog’s nose that feeds into a computer to report exactly what kind of molecule it’s detecting.” The key to their technology, explained Meinhart, is in the merging of principles from mechanical engineering and chemistry in a collaboration made possible by UCSB’s Institute for Collaborative Biotechnologies .
Results published this month in Analytical Chemistry show that their device can detect airborne molecules of a chemical called 2,4-dinitrotoluene, the primary vapor emanating from TNT-based explosives. The human nose cannot detect such minute amounts of a substance, but “sniffer” dogs have long been used to track these types of molecules. Their technology is inspired by the biological design and microscale size of the canine olfactory mucus layer, which absorbs and then concentrates airborne molecules.
Packaged on a fingerprint-sized silicon microchip and fabricated at UCSB’s state-of-the-art cleanroom facility, the underlying technology combines free-surface microfluidics and surface-enhanced Raman spectroscopy (SERS) to capture and identify molecules. A microscale channel of liquid absorbs and concentrates the molecules by up to six orders of magnitude. Once the vapor molecules are absorbed into the microchannel, they interact with nanoparticles that amplify their spectral signature when excited by laser light. A computer database of spectral signatures identifies what kind of molecule has been captured.
“The device consists of two parts,” explained Moskovits. “There’s a microchannel, which is like a tiny river that we use to trap the molecules and present them to the other part, a mini spectrometer powered by a laser that detects them. These microchannels are twenty times smaller than the thickness of a human hair.”
I saw the idea for this kind of device demonstrated in a science fiction movie in 1985 in Runaway, by Michael Crichton. The device is a small, portable "sniffer robot":
(Sniffer Robot from Runaway)
In the movie, the sniffer robot was also looking for explosive agents.
Via UCSB Engineering.
Scroll down for more stories in the same category. (Story submitted 12/4/2012)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 0 )
Related News Stories -
Low Cost Spray-On Solar Cells
'It turns sunlight into electricity... you spray it on.'- Larry Niven, 1995.
Wristify, Your Personal Cooling and Heating Device
'By law [a mandatory cooling unit] had to be strapped to every commuter's back...'- Philip K. Dick
Solar Roadways Could Power USA - Times 3
This would be great if it works - the roads might be better maintained as well.
Spaser-Based Circuits Could Be Printed On Clothing
'Alex rolled his wrist over to check the watch imprinted on his sleeve.'- Niven and Barnes, 1981.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
I'll be back next week...
Origami Robot Finally Self-Assembles, Walks On Its Own
Now shipping flat, but better than Ikea, because self-assembling.
A.L.O. Robot Butler Serves You At Aloft Hotel
'Her idea of what a butler-valet combo should look like...'
Mometum Machines Burgerbot
'One of these gorgeous eating places where we were served entirely by mechanical apparatus...'
Google Lobbies For Autonomous Motorcycles
'He had never ridden any motorized device that lacked onboard steering and balance systems.'
No Cages In Future Zoos Is Zootopia?
'The park... twisted through specimens from every inhabited planet of the known universe.'
Navdy HeadUp Display (HUD) For Your Car
'All displays are thrown on a mirror in front of you...'
Computer 'Aesop' Writes Fables With A Moral
'I handed Tony the master tape and he played it into the IBM'
Artificial Wombs - Ectogenesis Technology - Is On The Way
'Magnificent, aren't they? (Lama Su, in Star Wars II)
Robotic Exoskeleton For Shipyard Workers
'Earth's scientists solved the problem... devising rigid metallic clothing not unlike armor...'
Timeful Appointment App Learns, Optimizes Your Routines
'The [Daily Schedule program] suited its tone to his movements and the combined analysis of his psychophysical condition.'
3D Printing Your Science-Fictional Metals
I love science-fictional materials!
Bespoke Clothing In 30 Minutes
'He sat himself down in a sales cubicle and dialed the code number for kilts.'
Low Cost Spray-On Solar Cells
'It turns sunlight into electricity... you spray it on.'
Survival Seed Vault Low Cost Life Bank
'They existed in the Life Bank, as did virtually every plant...'
PoseiDrone Tentacled Undersea Robot Like HG Wells'
'Its motion was so swift, complex, and perfect that at first I did not see it as a machine...'
More SF in the News Stories
More Beyond Technovelgy science news stories