![](https://i.imgur.com/CLvY2jA.png")
02-08-2023, 06:27 PM
30 Jul 2023
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a team of researchers led by Dr Zhiqin Chu of the Department of Electrical and Electronic Engineering of the University of Hong Kong (HKU), together with Professor Lei Shao of the School of Electronics and Information Technology of Sun Yat-sen University, and Professor Qi Wang from Dongguan Institute of Opto-Electronics of Peking University developed a pioneering technological solution that counterfeiters have no response to.
Dr Chu’s team created diamond-based anti-counterfeiting labels that are unique and known in the industry as PUFs - Physically Unclonable Functions.
The team made these labels by planting tiny artificial diamonds – known as diamond microparticles, on a silicon plate using a method called Chemical Vapour Deposition (CVD).
The diamond microparticles, all different in shape and size, form a unique pattern when they scatter on the silicon substrate. Such pattern is impossible to replicate and therefore scatters light in a unique way. Put simply, it forms a unique “fingerprint” than can be scanned using a phone.
The second level of uniqueness, and hence security, comes from the fact that these diamond microparticles have defects known as silicon-vacancy (SiV) centers.
SiVs give diamond microparticles a unique optical property - they emit near-infrared photoluminescence when a green light is shone on them, which makes them easily identifiable. These unique optic signatures can then be combined and digitized into codes of very high sophistication and security that can be read by a simple smartphone scanner and/or a confocal fluorescence microscope.
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these diamond-based labels are highly suitable for the use in commercial products as they are extremely tough
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they are cheap – it costs just one US dollar to make 10,000 such labels of 200 µm × 200 µm dimensions.
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The labels are ready to be used commercially, said Dr Chu
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“Diamond anti-counterfeiting will be favoured in various high-end products such as jewellery, luxury goods, electronic products, and automobiles,” he said.
https://www.hku.hk/press/news_detail_26421.html
......
a team of researchers led by Dr Zhiqin Chu of the Department of Electrical and Electronic Engineering of the University of Hong Kong (HKU), together with Professor Lei Shao of the School of Electronics and Information Technology of Sun Yat-sen University, and Professor Qi Wang from Dongguan Institute of Opto-Electronics of Peking University developed a pioneering technological solution that counterfeiters have no response to.
Dr Chu’s team created diamond-based anti-counterfeiting labels that are unique and known in the industry as PUFs - Physically Unclonable Functions.
The team made these labels by planting tiny artificial diamonds – known as diamond microparticles, on a silicon plate using a method called Chemical Vapour Deposition (CVD).
The diamond microparticles, all different in shape and size, form a unique pattern when they scatter on the silicon substrate. Such pattern is impossible to replicate and therefore scatters light in a unique way. Put simply, it forms a unique “fingerprint” than can be scanned using a phone.
The second level of uniqueness, and hence security, comes from the fact that these diamond microparticles have defects known as silicon-vacancy (SiV) centers.
SiVs give diamond microparticles a unique optical property - they emit near-infrared photoluminescence when a green light is shone on them, which makes them easily identifiable. These unique optic signatures can then be combined and digitized into codes of very high sophistication and security that can be read by a simple smartphone scanner and/or a confocal fluorescence microscope.
......
these diamond-based labels are highly suitable for the use in commercial products as they are extremely tough
......
they are cheap – it costs just one US dollar to make 10,000 such labels of 200 µm × 200 µm dimensions.
......
The labels are ready to be used commercially, said Dr Chu
......
“Diamond anti-counterfeiting will be favoured in various high-end products such as jewellery, luxury goods, electronic products, and automobiles,” he said.
https://www.hku.hk/press/news_detail_26421.html
