@article {niu2014theoretical,
	title = {A theoretical study of grating structured triboelectric nanogenerators},
	journal = {Energy \&amp; Environmental Science},
	volume = {7},
	number = {7},
	year = {2014},
	pages = {2339{\textendash}2349},
	publisher = {Royal Society of Chemistry},
	author = {Niu, Simiao and Wang, Sihong and Ying Liu and Zhou, Yu Sheng and Lin, Long and Hu, Youfan and Pradel, Ken C and Wang, Zhong Lin *}
}
