Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Invisible QR codes tackle counterfeit bank notes

Abstract:
An invisible quick response (QR) code has been created by researchers in an attempt to increase security on printed documents and reduce the possibility of counterfeiting, a problem which costs governments and private industries billions of pounds each year.



The development process can be viewed in this video.

Invisible QR codes tackle counterfeit bank notes

London, UK | Posted on September 11th, 2012

Publishing their research today, 12 September, in IOP Publishing's journal Nanotechnology, the researchers from the University of South Dakota and South Dakota School of Mines and Technology believe the new style of QR code could also be used to authenticate virtually any solid object.

The QR code is made of tiny nanoparticles that have been combined with blue and green fluorescence ink, which is invisible until illuminated with laser light. It is generated using computer-aided design (CAD) and printed onto a surface using an aerosol jet printer.

According to the researchers, the QR code will add an increased level of security over existing counterfeiting methods as the complexity of the production process makes it very difficult to replicate.

The combination of the blue and green inks also enabled the researchers to experiment with a variety of characters and symbols in different colours and sizes, varying from microscopic to macroscopic. Embedding these into the QR code further increases the level of security.

Under normal lighting conditions the QR code is invisible but becomes visible when near infra-red light is passed over it. This process, known as upconversion, involves the absorption of photons by the nanoparticles at a certain wavelength and the subsequent emission of photons at a shorter wavelength.

Once illuminated by the near infra-red light, the QR code can be read by a smartphone in the conventional manner.

QR codes can hold one hundred times more information than conventional barcodes and have traditionally been used in advertising and marketing. For example, simply scanning a QR code on a commercial product with a smartphone will take the user to a company's website, giving them more information about the product they are scanning.

The nanoparticles that were used to print the QR code are both chemically and mechanically stable meaning they could withstand the stresses and strains of being placed on paper. To prove this, the researchers printed the QR code onto a piece of paper and then randomly folded it fifty times; the code was still readable.

In addition to being printed on paper, the QR code has also been printed on glass and a flexible plastic film, demonstrating its applicability to a wide variety of solid commercial goods. The fact that the QR code is invisible is also beneficial as it would not interfere with the physical appearance of the goods.

The whole procedure took one-and-a-half hours, from the CAD process to the printing and then the scanning; however, the researchers are confident that once the QR file has been created, the printing en masse for commercial use would take around 10-15 minutes.

Lead author of the study, Jeevan Meruga, said: "The QR code is tough to counterfeit. We can also change our parameters to make it even more difficult to counterfeit, such as controlling the intensity of the upconverting light or using inks with a higher weight percentage of nanoparticles.

"We can take the level of security from covert to forensic by simply adding a microscopic message in the QR code, in a different coloured upconverting ink, which then requires a microscope to read the upconverted QR code."


The published version of the paper "Security printing of covert quick response codes using upconverting nanoparticle inks" Jeevan M Meruga et al 2012 Nanotechnology 23 395201 doi:10.1088/0957-4484/23/39/395201 will be freely available online from Wednesday 12 September.

####

About Institute of Physics
The Institute of Physics is a leading scientific society promoting physics and bringing physicists together for the benefit of all.

It has a worldwide membership of around 40 000 comprising physicists from all sectors, as well as those with an interest in physics. It works to advance physics research, application and education; and engages with policy makers and the public to develop awareness and understanding of physics. Its publishing company, IOP Publishing, is a world leader in professional scientific communications. Go to www.iop.org

About IOP Publishing

IOP Publishing provides publications through which leading-edge scientific research is distributed worldwide. IOP Publishing is central to the Institute of Physics (IOP), a not-for-profit society. Any financial surplus earned by IOP Publishing goes to support science through the activities of IOP. Beyond our traditional journals programme, we make high-value scientific information easily accessible through an ever-evolving portfolio of community websites, magazines, conference proceedings and a multitude of electronic services. Focused on making the most of new technologies, we're continually improving our electronic interfaces to make it easier for researchers to find exactly what they need, when they need it, in the format that suits them best. Go to ioppublishing.org.

For more information, please click here

Contacts:
Michael Bishop

01-179-301-032

Copyright © Institute of Physics

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Conversion of Greenhouse Gases to Syngas in Presence of Nanocatalysts in Iran May 22nd, 2015

New Antibacterial Wound Dressing in Iran Can Display Replacement Time May 22nd, 2015

Haydale Named Lead Sponsor for Cambridge Graphene Festival May 22nd, 2015

Simulations predict flat liquid May 21st, 2015

Researchers develop new way to manufacture nanofibers May 21st, 2015

Videos/Movies

Researchers develop new way to manufacture nanofibers May 21st, 2015

Artificial photosynthesis: New, stable photocathode with great potential May 12th, 2015

Precision Automation Actuator Features Closed-Loop Force and Position Control May 7th, 2015

Law enforcement/Anti-Counterfeiting/Security/Loss prevention

Better sensors for medical imaging, contraband detection: Magnetic-field detector is 1,000 times more efficient than its predecessors April 6th, 2015

Optics, nanotechnology combined to create low-cost sensor for gases April 3rd, 2015

UT Dallas engineers twist nanofibers to create structures tougher than bulletproof vests March 27th, 2015

Pens filled with high-tech inks for do-it-yourself sensors March 3rd, 2015

Discoveries

Conversion of Greenhouse Gases to Syngas in Presence of Nanocatalysts in Iran May 22nd, 2015

New Antibacterial Wound Dressing in Iran Can Display Replacement Time May 22nd, 2015

Nanotherapy effective in mice with multiple myeloma May 21st, 2015

Turn that defect upside down: Twin boundaries in lithium-ion batteries May 21st, 2015

Announcements

Conversion of Greenhouse Gases to Syngas in Presence of Nanocatalysts in Iran May 22nd, 2015

New Antibacterial Wound Dressing in Iran Can Display Replacement Time May 22nd, 2015

Haydale Named Lead Sponsor for Cambridge Graphene Festival May 22nd, 2015

INSIDDE: Uncovering the real history of art using a graphene scanner May 21st, 2015

Photonics/Optics/Lasers

Samtec, Global Provider of Interconnect Systems, Joins IRT Nanoelec Silicon Photonics Program May 21st, 2015

Taking control of light emission: Researchers find a way of tuning light waves by pairing 2 exotic 2-D materials May 20th, 2015

Computing at the speed of light: Utah engineers take big step toward much faster computers May 18th, 2015

Wearables may get boost from boron-infused graphene: Rice U. researchers flex muscle of laser-written microsupercapacitors May 18th, 2015

Research partnerships

Supercomputer unlocks secrets of plant cells to pave the way for more resilient crops: IBM partners with University of Melbourne and UQ May 21st, 2015

Taking control of light emission: Researchers find a way of tuning light waves by pairing 2 exotic 2-D materials May 20th, 2015

Efficiency record for black silicon solar cells jumps to 22.1 percent: Aalto University's researchers improved their previous record by over 3 absolute percents in cooperation with Universitat Politècnica de Catalunya May 18th, 2015

Organic nanoparticles, more lethal to tumors: Carbon-based nanoparticles could be used to sensitize cancerous tumors to proton radiotherapy and induce more focused destruction of cancer cells, a new study shows May 18th, 2015

Printing/Lithography/Inkjet/Inks

Printing 3-D graphene structures for tissue engineering: A new ink formulation allows for the 3-D printing of graphene structures May 19th, 2015

ORNL demonstrates first large-scale graphene fabrication May 14th, 2015

New JEOL E-Beam Lithography System to Enhance Quantum NanoFab Capabilities May 6th, 2015

Inkjet printing process for kesterite solar cells May 6th, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project