title: Flexible Piezoelectric-Induced Pressure Sensors for Static Measurements Based on Nanowires/Graphene Heterostructures.
abstract: The piezoelectric effect is widely applied in pressure sensors for the detection of dynamic signals. However, these piezoelectric-induced pressure sensors have challenges in measuring static signals that are based on the transient flow of electrons in an external load as driven by the piezopotential arisen from dynamic stress. Here, we present a pressure sensor with nanowires/graphene heterostructures for static measurements based on the synergistic mechanisms between strain-induced polarization charges in piezoelectric nanowires and the caused change of carrier scattering in graphene. Compared to the conventional piezoelectric nanowire or graphene pressure sensors, this sensor is capable of measuring static pressures with a sensitivity of up to 9.4 × 10-3kPa-1and a fast response time down to 5-7 ms. This demonstration of pressure sensors shows great potential in the applications of electronic skin and wearable devices.
authors.affiliation: Department of Electronic Engineering, The Chinese University of Hong Kong , Hong Kong SAR, People's Republic of China.
authors.forename: Zefeng
authors.identifier: 0000-0002-0689-8443
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Faculty of Physics & Electronic Sciences, Hubei University , 368 Youyi Road, Wuhan 430062, People's Republic of China.
authors.forename: Zhao
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Electronic Engineering, The Chinese University of Hong Kong , Hong Kong SAR, People's Republic of China.
authors.forename: Xinming
authors.identifier: 0000-0002-7844-8417
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors.forename: Yuxuan
authors.identifier: 0000-0003-0638-2620
authors.initials: Y
authors.lastname: Lin
authors.affiliation: Department of Electronic Engineering, The Chinese University of Hong Kong , Hong Kong SAR, People's Republic of China.
authors.forename: Ningqi
authors.initials: N
authors.lastname: Luo
authors.affiliation: Department of Electronic Engineering, The Chinese University of Hong Kong , Hong Kong SAR, People's Republic of China.
authors.forename: Mingzhu
authors.initials: M
authors.lastname: Long
authors.affiliation: Department of Electronic Engineering, The Chinese University of Hong Kong , Hong Kong SAR, People's Republic of China.
authors.forename: Ni
authors.initials: N
authors.lastname: Zhao
authors.affiliation: Department of Electronic Engineering, The Chinese University of Hong Kong , Hong Kong SAR, People's Republic of China.
authors.forename: Jian-Bin
authors.initials: JB
authors.lastname: Xu
keywords: flexible device; graphene; piezoelectric nanowire; pressure sensor; static measurements