July 2023

“HKU PERfECT” is the first wearable platform that can simultaneously acquire the following three merits.

1. Highly sensitive: By combing electrochemical technology with microelectronic technology, the highest sensitivity is reached.

2. Smallest and lightest: By using the smallest possible electronic units and marrying emerging stretchable bioelectronic technologies, coin-sized and light (0.5 grams) PERfECT wearables have been used for diagnosis and treatment of various diseases, and rehabilitation.

3. Energy efficient: By using interdisciplinary research strategies spanning analytical chemistry, low-power microelectronics, and low-power wireless communication, PERfECT achieves the highest accuracy with the lowest power consumption, ideal for long-term using.

Professor Choy’s team invented silver nanowire (NW) based flexible transparent electrodes (FTEs) and silver nanoparticle (NP) electrodes. They both have attractive electrical and optical properties, and low-cost. By intergrating both inventions (that is disposing a layer of nanoparticle on the NW FTEs), it can be used as flexible organic photovoltaics.

This project aims to study the behaviour of MTR passengers during COVID-19 based on a large set (>325GB) of MTR trip records collected in 2019-2020. An efficient and secure online platform has been built to enable researchers to perform analyses and generate visualizations.

Counterfeiting threatens the global economy and security. According the report issued by the United States Patent and Trademark Office (USPTO) in 2020 “the value of global counterfeiting and pirated products is estimated US $ 4.5 trillion a year.” Despite enormous efforts, conventional anti-counterfeiting approaches such as QR codes can be easily fabricated due to limited data encryption capacity on a 2D in-plane space.

How can we increase the encryption density in a limited space?