Vertically aligned ZnO nanoarray directly orientated on Cu paper by h-BN monolayer for flexible and transparent piezoelectric nanogenerator

Guozhen Liu, Yan Tang, Abdul Majid Soomro, Peng Shen, Shiqiang Lu, Yehang Cai, Hao Wang, Qianyi Yang, Han Chen, Yingbing Shi, Chun Lin, Feiya Xu, Fuchun Xu, Zhiming Wu, Fuchun Xu, Duanjun Cai, Junyong Kang, Duanjun Cai, Junyong Kang