The University of Hong Kong (HKU), in collaboration with other universities, harnesses the physical and optical properties of diamond microparticles to develop anti-counterfeit labels with “physically unreplicable features.” Each label contains a unique optical signature, and the research findings have been published in Nature Communications.
This study was led by Dr. Chu Zhiqin, Assistant Professor of the Department of Electrical and Electronic Engineering at HKU, along with Professor Shao Lei of the School of Electronics and Information Technology of Sun Yat-sen University, and Professor Wang Qi from Dongguan Institute of Opto-Electronics of Peking University. Using a method known as Chemical Vapor Deposition (CVD), the team utilized silicon substrate and coated it with diamond microparticles to form the labels. These particles exhibit all different shapes, sizes, and patterns, which are impossible to replicate physically.
