**Author details**

Zhenhua Dan1,2\*, Fengxiang Qin<sup>3</sup> , Izumi Muto<sup>2</sup> , Nobuyoshi Hara<sup>2</sup> and Hui Chang1

\*Address all correspondence to: zhenhuadan@njtech.edu.cn

1 Tech Institute for Advanced Materials and College of Materials Science and Engineering, Nanjing Tech University, Nanjing, China

2 Department of Materials Science, Tohoku University, Sendai, Japan

3 School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China
