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 |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Engineering ")

Metalenses Now Reconfigurable With Liquid Crystal
'Hufhuf oil held in static tension...' - Frank Herbert, 1965.

NDB Nuclear Waste Battery Lasts A Lifetime
'Trillions of units of power could be compressed thus into an inch-square cube of what looked like blue-white ice.' - Edmond Hamilton, 1940.

Blaux Your Personal Commuter Cooling Unit
A cooling unit had to be strapped to every commuter's back, by law.

SunnyFive 'Window' Has Full Spectrum Angled Natural Light
'On the ceilings are screens.' - Stanislaw Lem, 1961.

 

Google
  Web TechNovelgy.com   

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.

 

 

 

 

 

Current News

Beat Covid-19 With AIR By MicroClimate - At Last I Get My PAPR
More than just a bubble.

Mi TV LUX Transparent Edition OLED TV
The Look of Things To Come.

Metalenses Now Reconfigurable With Liquid Crystal
'Hufhuf oil held in static tension...'

'Alexa For Residential' A Landlord's Dream (Tenant's Nightmare?)
'...unseen mechanical entities... that are in our very midst. One of them following each of us.'

Gather Ye Moonrocks While Ye May
'The law of filing on newly discovered asteroids was definite.'

InMotion V11 Electric Unicycle Gets Air (Video)
'A tumblebug does not give a man dignity...'

Rid Thyself Of Ads On The Newsbox
'Can't we scramble that commercial?'

A.I. Jesus Proclaims Machine Gospel
'... he crossed the waiting room to the Padre booth; inside he put a dime into the slot and dialed at random.'

Google's Remixed 'Your News Update' ala Heinlein, Clarke, Pohl
'Perhaps we had better use the soundtrack and let it hunt.'

iSphere Plastique Fantastique Face Mask Alternative
'Among these were some clad in the insulated space-suits, with their transparent glassite helmets.'

Inkjet-Printed Wearable Solar Cells
Ultra-thin wearable organic photovoltaic material.

NDB Nuclear Waste Battery Lasts A Lifetime
'Trillions of units of power could be compressed thus into an inch-square cube of what looked like blue-white ice.'

Neuralink Will Land A Chip In Your Brain
'What are you talking about? Do you mean a neural lace?'

EPR Is Quick, Temporary Biostasis
'The cold-pack was being sucked out greedily by plastic suction tendrils...'

It's Time For Robots With Soft, Sensitive Skin
Sure, solid metal skin robots looked great once - like in science fiction movies of the 1920's.

An Ocean On Ceres
'We sailed gently forward, hull down to the asteroid's surface... A little sea was now beneath us.'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.