About the Authors

Long-Ho Chau

Affiliation Centre for Micro and Nano Systems, The Chinese University of Hong Kong, Hong Kong

Wenfeng Liang

Affiliation State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China

Florence Wing Ki Cheung

Affiliation School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong

Wing Keung Liu

ken-liu@cuhk.edu.hk (WKL); wenjli@cityu.edu.hk (WJL)

Affiliation School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong

Wen Jung Li

ken-liu@cuhk.edu.hk (WKL); wenjli@cityu.edu.hk (WJL)

Affiliations Centre for Micro and Nano Systems, The Chinese University of Hong Kong, Hong Kong, State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China, Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong

Shih-Chi Chen

Affiliation Centre for Micro and Nano Systems, The Chinese University of Hong Kong, Hong Kong

Gwo-Bin Lee

Affiliation Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WJL L-HC. Performed the experiments: L-HC. Analyzed the data: L-HC WL. Contributed reagents/materials/analysis tools: FWKC WKL G-BL S-CC. Wrote the paper: L-HC.