Michael J Kenney, Jianan Erick Huang, Yong Zhu, Yongtao Meng, Mingquan Xu, Guanzhou Zhu, Wei-Hsuan Hung, Yun Kuang, Mengchang Lin, Xiaoming Sun, Wu Zhou, Hongjie Dai Nano Research volume 12, pages1431–1435(2019)https://doi.org/10.1007/s12274-019-2379-7