Smart Material of the Device (IMAGE) The Chinese University of Hong Kong Caption The smart material of the device will bend alongside the motion of the human knee, and convert the biomechanical energy to electricity. Credit The Chinese University of Hong Kong Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.