About the Authors
- Ka-Ming Wai
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* E-mail: bhkmwai@cityu.edu.hk (K-MW); peter.yu@cityu.edu.hk (PY)
Affiliation Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, SAR, China
- Peter K. N. Yu
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* E-mail: bhkmwai@cityu.edu.hk (K-MW); peter.yu@cityu.edu.hk (PY)
Affiliation Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, SAR, China
- Ka-Se Lam
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Affiliation Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, SAR, China
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: WKM PKNY. Performed the experiments: WKM. Analyzed the data: WKM. Contributed reagents/materials/analysis tools: WKM KSL. Wrote the paper: WKM PKNY.