Media OutReach HKU Engineering researchers develop a soft colour-changing system that may lead to revolutionary optical devices By Media Outreach - September 25, 2023 0 WhatsAppFacebookTwitterLinkedinTelegramEmailPrint HONG KONG SAR – Media OutReach – 25 September 2023 – Researchers at the University of Hong Kong (HKU) designed an innovative pixalated soft colour-changing system called Morphable Concavity Array (MoCA).