loT is the key to building a smart city, in which sensors act as eyes and ears of the system to collect and convert physical variables into electronic signals for analysis. A self-powered wireless sensing e-sticker, thin as two human hairs, developed by CUHK, converts the power of a finger touch into electromagnetic wave signals to advance the smart sensing technology. Another discovery is a TENG with high power output to better harvest mechanical and biomechanical motion.

The ocean is the largest energy treasure house on earth, covering approximately 70% of its surface. Harvesting this is called “blue energy” and it’s a solution to energy crisis. However, given its complex technology and high cost, electricity generation from blue energy isn’t easy. A CUHK research team has recently developed a high-efficacy generator for harnessing ocean wave energy, which turns a new page.