In today's world, people are constantly on guard against credit card cloning, counterfeit money, and fake trademarks on products. It's essential to stay alert when shopping and to carefully verify the authenticity of what you buy. However, this may soon become a thing of the past. The Korean Academy of Science and Technology has developed an innovative anti-counterfeiting technology that makes duplication nearly impossible.
This new system uses a thin plastic film, thinner than a human hair, embedded with 20 to 30 nano-silver filaments. Each filament measures between 10 to 50 microns in length. The film is made from polyethylene terephthalate, a material commonly used in clear plastic bottles. These silver wires are created using a special solution and then coated with silicon and dyed with fluorescent substances. While the fluorescent color is invisible to the naked eye, it can be easily detected under an optical microscope. Additional colors can be added to further increase the difficulty for counterfeiters.
Published in the journal *Nanotechnology*, the researchers claim this technology has broad applications—from electronic product labels and medicine packaging to credit cards and currency. It can also be combined with unique identity codes or barcodes, allowing quick verification through a computer database.
According to Professor Li Xiaozhe from the Korea Academy of Science and Technology, "It’s extremely difficult to replicate the nanowire pattern, making this anti-counterfeiting mark almost impossible to copy." He adds that while the production cost is around $0.35 per unit, the cost for counterfeiters to reproduce it would be significantly higher—potentially more expensive than the product itself.
With 6% of global goods being counterfeit, according to the World Customs Organization, this new technology offers a promising solution. Compared to other anti-counterfeiting methods, it is low-cost, simple to produce, and highly secure.
Governments worldwide have long struggled to combat counterfeiting. For example, the Royal Mint spent four years and over £2 million to develop a new £1 coin with advanced security features inspired by banknote technology. This new version is now considered one of the hardest currencies to counterfeit.
Looking ahead, as competition in the market intensifies, nano-anti-counterfeiting technology is expected to be widely adopted on product labels, helping consumers make safer and smarter purchases.
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