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Nanocolloidal hydrogel inks for anti-counterfeiting

Oct 07, 2021

(Nanowerk News) Scientists from ITMO University, Bauman Moscow State Technical University, and the University of Toronto have developed gel ink that can be utilized to create complicated multilayered photographs with the assistance of 3D printing. Such photographs can be utilized as tags that can contribute to anti-counterfeiting safety. The proposed methodology is secure and eco-friendly: it may be used even within the meals trade. The outcomes had been printed in Advanced Functional Materials (“Multicolored Nanocolloidal Hydrogel Inks”). The improvement of latest anti-counterfeiting safety strategies is essential not only for producers who lose a share of their earnings to counterfeit items but additionally for patrons. Low-quality knock-offs, particularly of meals merchandise, cosmetics, and medicines will be dangerous for patrons. The hottest anti-counterfeiting safety strategies are RFID tags and “invisible” photographs. The latter method is extra promising, eco-friendly, and secure. While RFID tags make use of rare-earth metals, photographs will be utilized utilizing renewable assets, for instance natural and inorganic polymers. “We succeeded in developing polymer-based gel tags that can contain several images at once. And every such image is an optically active structure. They can be seen in detail only under monochromatic radiation, i.e. at a specific wavelength, and we can make it different for every image. Meaning that even if the perpetrators succeed in forging a part of the tag, there’s a good chance that they wouldn’t be able to forge the others. What’s more, the difference between the original pattern and the forged one will be immediately apparent,” feedback Egor Ryabchenko, a scholar at ITMO’s ChemBio Cluster. The tags developed at ITMO will be utilized not solely on even surfaces but additionally on these with complicated geometry. What’s extra, the researchers be aware that the tags don’t percolate even by way of skinny membranes, which makes it attainable to make use of them in meals packaging. The invention can be good for shielding model clothes: the tags look good, will be simply washed off with an natural solvent, and don’t injury or dye materials. “We developed a technology that can now be used as a basis for even more complex types of ink that can be adapted to the needs of specific customers. For example, equipment manufacturers might need better thermal resistance, and those who produce brand-name clothing – better plasticity. Experiments associated with ink formulas are among our future plans. By changing its composition, we’ll be able to give our ink new properties,” concludes Egor Ryabchenko.

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