@article {niu2013theory,
	title = {Theory of sliding-mode triboelectric nanogenerators},
	journal = {Advanced Materials},
	volume = {25},
	number = {43},
	year = {2013},
	pages = {6184{\textendash}6193},
	publisher = {Wiley Online Library},
	author = {Niu, Simiao and Ying Liu and Wang, Sihong and Lin, Long and Zhou, Yu Sheng and Hu, Youfan and Wang, Zhong Lin *}
}
