1. Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR999077, China
2. Laboratory for High Performance Ceramics, Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf8600, Switzerland
3. Biomedical and Mobile Health Technology Lab, Department of Health Sciences and Technology, ETH Zürich, Zürich8008, Switzerland
4. Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR999077, China