About the Authors

Li Xiong

Affiliations School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an, 710048, China, School of Physics and Electromechanical Engineering, He’xi University, Zhang’ye, 734000, China

Yan-Jun Lu

yanjunlu@xaut.edu.cn

Affiliation School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an, 710048, China

Yong-Fang Zhang

Affiliation School of Printing, Packaging Engineering and Digital Media, Xi’an University of Technology, Xi’an, 710048, China

Xin-Guo Zhang

Affiliation School of Information Science and Engineering, Lan’zhou University, Lan’zhou, 730000, China

Parag Gupta

Affiliation Robert R. McCormick School of Engineering and Applied Science, Northwestern University, Evanston, IL, 60208, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LX XGZ YJL. Performed the experiments: LX YJL XGZ. Analyzed the data: LX YJL YFZ XGZ. Contributed reagents/materials/analysis tools: LX YJL YFZ XGZ. Wrote the paper: LX YJL PG.