@article {liu2019ultrathin,
	title = {Ultrathin, flexible and transparent graphene-based triboelectric nanogenerators for attachable curvature monitoring},
	journal = {Journal of Physics D: Applied Physics},
	volume = {52},
	number = {31},
	year = {2019},
	pages = {314002},
	publisher = {IOP Publishing},
	author = {Liu, Zhaoxian and Zhao, Zhizhen and Zeng, Xiangwen and Fu, Xiuli and Hu, Youfan}
}
