A wave-shaped hybrid piezoelectric and triboelectric nanogenerator based on P (VDF-TrFE) nanofibers - Chen, Xuexian; Han, Mengdi; Chen, Haotian; Cheng, Xiao Liang; Yu Song; Su, Zongming; Jiang, Yonggang; Zhang, Haixia (Nanoscale, 2017)