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HomeTechNano-material based security ink developed indigenously to help combat counterfeiting of currency...

Nano-material based security ink developed indigenously to help combat counterfeiting of currency and documents

Vijay Mohan

Press Reporter News Service

Chandigarh, October 26

A extremely steady and non-toxic luminescent safety ink has been developed indigenously from nano-materials that can assist fight counterfeiting of currency-notes, drugs, certificates, paperwork and branded items.

Counterfeiting is quite common everywhere in the world and it has develop into a critical difficulty. Luminescent ink is usually used as covert tags to fight the counterfeiting. Most safety inks accessible as we speak are based mostly on luminescent supplies that take up a excessive vitality photon and emit low vitality photon.

That is technically known as ‘downshifting’ the place the covert tag stays invisible below daylight however turns into seen below ultra-violet gentle. Nonetheless, these single emission-based tags are vulnerable to replication.

To beat this disadvantage, luminescent ink with excitation-dependent luminescent properties, that’s each downshifting and upconversion are suggested. It is because growing the variety of parameters required to decode the tag decreases the potential for decoding and replication. Most supplies getting used for this function are based mostly on fluorides that are much less steady and extremely poisonous.

A staff from the Institute of Nano Science and Know-how, Mohali, led by Dr Sanyasinaidu Boddu, has developed non-toxic steel phosphate-based ink with excitation dependant luminescent properties that are extremely steady below sensible circumstances akin to temperature, humidity and lightweight.

The luminescent safety ink developed by the researcher confirmed very robust downshifting in addition to upconversion properties. Additionally, the downshifting luminescence color of the ink is extremely depending on the excitation wavelength, making it tough to decode the covert tag.

These luminescent nano supplies have been synthesised through a easy co-precipitation methodology. A composite was made with these nano particles and commercially accessible PVC gold medium ink. The composite ink was used to print patterns and letters on black paper. The patterns of this ink below totally different excitation wavelengths have been discovered to be steady in opposition to varied circumstances which can happen throughout sensible functions.

“The trivalent lanthanide ions which have been used have very wealthy vitality ranges which assist to soak up a excessive vitality photon and emit low vitality photon, in addition to take up low vitality photon and emit a excessive vitality photon,” Dr Boddu mentioned.

“The nano-particle lanthanide ions are identified for his or her glorious downshifting and upconversion luminescent properties. We thought that if these supplies are utilized for anti-counterfeiting, it would give higher encoding, decoding capability and thereby enhance safety features,” he added.

The developed ink has enormous potential to fight counterfeiting and the widespread man can discover out simply whether or not the doc or product is authentic or faux, in accordance with a press release issued by the Ministry of Science and Know-how as we speak. The analysis has been printed within the journals, Crystal Progress and Design and Supplies Right this moment Communications.

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