“Materials engineers led by Jon Kellar at the South Dakota School of Mines and Technology says their invention comprises a QR code made of nanoparticles that have been combined with blue and green fluorescent ink. The code is sprayed onto a surface — paper, plastic film, office tape, glass — using an aerosol jet printer. It remains invisible until the object is illuminated by a near-infrared laser. The nanoparticles absorb photons at a non-visible wavelength but emit them in a visible wavelength, a trick called upconversion that causes the QR code to pop up almost like magic and allow itself to be scanned.”
http://www.rawstory.com/rs/2012/09/11/new-nano-code-ups-the-fight-against-counterfeiters/
Did you like this?
Tip Freedomwat.ch Staff with Bitcoin
Tip Freedomwat.ch Staff with Bitcoin
Related posts:
'Copblock' wiretap case goes to court in Manchester
State Department: Bradley Manning had ‘chilling effect’ on foreign relations
300 tonnes of radioactive water is worst leak yet at Japan’s Fukushima
Supreme Court rules in favor of Florida property owner over denied development permit
Trump to courts: Stop opposing my travel ban, because here's another one
Russia sends warship with 'special cargo' toward Syria
Why Gordon Brown sold Britain's gold at a knock-down price [2012]
A Ghost Army of Workers Is Paid to Do Nothing in the Gulf
Germany stops Icelandic whale meat shipment to Japan in environmentalist victory
Stockholm’s unrest stoked by unemployment
Syrian President Bashar al Assad - Charlie Rose Interview 9/9/2013
Wary Swiss Banks Shun Americans
Minting Pennies & Nickels Cost U.S. Taxpayers $436 Million Since 2006
Phoenix VA officials put on leave after denial of secret wait list
West Virginia officer fired after refusing to shoot man with unloaded gun