@article {liu2019expandable,
	title = {Expandable microsphere-based triboelectric nanogenerators as ultrasensitive pressure sensors for respiratory and pulse monitoring},
	journal = {Nano Energy},
	volume = {59},
	year = {2019},
	pages = {295{\textendash}301},
	publisher = {Elsevier},
	author = {Liu, Zhaoxian and Zhao, Zhizhen and Zeng, Xiangwen and Fu, Xiuli* and Hu, Youfan*}
}
