Mechanical exfoliation of non-layered metal oxides into ultrathin flakes

Ruijie Li, Zhixin Yao, Zhenjiang Li, Lei Liao, Huacong Sun, Chaonan Cong, Xudan Huang, Kang Wu, Tingjun Wang, Huifeng Tian, PeiChi Liao, Shizhuo Liu, Yihan Wang, Lina Yang Zhang, U Sasaki, Ge Yin, Junjie Guo, Yu Ye, Xiaoding Wei, Xueyun Wang, Jiawang Hong, Jinhai Mao, Lihong Bao, Lifen Wang, Xuedong Bai, Peng Gao, Kaihui Liu, Lei Liao, Jun He, Shulin Bai, Yanfeng Zhang, Yanglong Hou, Ruqiang Zou, Hong-Jun Gao, Yue Zhang, Enge Wang, Lei Liu