Adjusting Sensitivity and Linearity of the Wearable Pressure Sensors by an Arbitrary Micro-Protuberance Structure of Polyvinylidene Fluoride/Reduced Graphene Oxide Dielectric Films

Huang，Jingxia1,2; Wang，Feng1,2; Xu，Xinwei1,2; Hu，Renchao1,2; Wang，Zehuan1,2; Wang，Hong1,2

2021-09-01

10.1002/adem.202100326

ADVANCED ENGINEERING MATERIALS   影响因子和分区

1438-1656

1527-2648

Flexible pressure sensors with high sensitivity over a broad linear range and fast response have extension applications in wearable electronics. Herein, we prepared a tunable capacitive pressure sensors based on arbitrary micro-protuberances geometry films via low-cost soft lithography, employing the polyvinylidene fluoride/reduced graphene oxide (PVDF/rGO) composite with a high dielectric constant of 172 and low loss tangent of 0.48. The hierarchical microstructures’ different sizes endow the sensors adjustable pressure response, achieving the regulation of sensitivity and linear detection range. The superior microstructured film-based sensor exhibits a high sensitivity (1.19 kPa) over 20 times that of the bulk film, wide linearity (1.3 kPa), a rapid response (43 ms), a low limit of detection (10.6 Pa), and remarkable durability over 5000 compression/release cycles. In addition, based on the excellent sensing performance above-mentioned, the device is successfully employed in the scenario of monitoring pressure interaction and human activities by mounting on different parts of the human body or object. This work provides a means to optimize the sensor's sensitivity and linearity by hierarchical structure and contributes to its wearable electronic applications.

capacitive pressure sensor hierarchical microstructure tunable performance wearable application

SCI ; EI

英语

第一 ; 通讯

WOS:000658021600001

20212310457649

Capacitive sensors ; Composite films ; Dielectric films ; Flexible electronics ; Fluorine compounds ; Graphene ; Lithography ; Microstructure ; Oxide films ; Pressure sensors

Dielectric Materials:708.1 ; Electronic Equipment, General Purpose and Industrial:715 ; Control Devices:732 ; Nanotechnology:761 ; Chemical Products Generally:804 ; Pressure Measuring Instruments:944.3 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85107111379

Scopus

1.Department of Materials Science and Engineering & Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices,South University of Science and Technology,Shenzhen,518 055,China
2.Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices,Southern University of Science and Technology,Shenzhen,518 055,China

Huang，Jingxia,Wang，Feng,Xu，Xinwei,et al. Adjusting Sensitivity and Linearity of the Wearable Pressure Sensors by an Arbitrary Micro-Protuberance Structure of Polyvinylidene Fluoride/Reduced Graphene Oxide Dielectric Films[J]. ADVANCED ENGINEERING MATERIALS,2021,23(9).

Huang，Jingxia,Wang，Feng,Xu，Xinwei,Hu，Renchao,Wang，Zehuan,&Wang，Hong.(2021).Adjusting Sensitivity and Linearity of the Wearable Pressure Sensors by an Arbitrary Micro-Protuberance Structure of Polyvinylidene Fluoride/Reduced Graphene Oxide Dielectric Films.ADVANCED ENGINEERING MATERIALS,23(9).

Huang，Jingxia,et al."Adjusting Sensitivity and Linearity of the Wearable Pressure Sensors by an Arbitrary Micro-Protuberance Structure of Polyvinylidene Fluoride/Reduced Graphene Oxide Dielectric Films".ADVANCED ENGINEERING MATERIALS 23.9(2021).