1. Department of Physics Hong Kong Baptist University (HKBU) Kowloon Tong Kowloon Hong Kong SAR China
2. HKBU Institute of Research and Continuing Education Shenzhen Guangdong 518057 China
3. Golden Meditech Centre for NeuroRegeneration Sciences HKBU Kowloon Tong Kowloon Hong Kong SAR China
4. Department of Biology HKBU Kowloon Tong Kowloon Hong Kong SAR China
5. Institute of Advanced Materials State Key Laboratory of Environmental and Biological Analysis HKBU Kowloon Tong Kowloon Hong Kong SAR China