Wide Range Fabrication of Wrinkle Patterns for Maximizing Surface Charge Density of a Triboelectric Nanogenerator - Cheng, Xiao Liang; Song, Zijian; Miao, Liming; Guo, Hang; Su, Zongming; Yu Song; Zhang, Hai-Xia (Journal of Microelectromechanical Systems, 2018)