High-Performance Paper-Based Capacitive Flexible Pressure Sensor and Its Application in Human-Related Measurement

Abstract

Flexible pressure sensors (FPS) have shown wide applications in artificial robotics, wearable devices, electronic skins, and biomedical systems; however, complicated procedures like micromachining and micromolding are often involved to achieve high performance of the sensor. In this work, a novel capacitive FPS was prepared by using silver nanowire (AgNW)-paper substrates as electrodes and polydimethylsiloxane (PDMS) as dielectrics, and results revealed that the sensitivity and dynamic range of the as-prepared sensor were 1.05 kPa −1 and 1 Pa to 2 kPa, respectively, which were comparable to the state-of-the-art ones; practical application measurements further indicated that the capacitive FPS was capable of detecting bending, finger tap, and human speech as well as identifying object profile; therefore, it shows good potential for applying in artificial skin and wearable devices.

Flexible capacitive pressure sensors for wearable electronics

“…2c) 33,55,56 or ordinary paper (Fig. 2d) 37 as well as biodegradable materials, e.g. cellulose fiber, [57][58][59][60] have also been applied as substrates.…”

Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives

“…A small amount of exerted force may cause the plates to deflect and capacitance to change [190]. Like the piezoresistive one, the piezocapacitive sensing principle is widely used in wearable sensors, including the use of graphene and its derivatives [191,192], CNT [193,194], metal NPs and NWs [195][196][197], conductive polymers [198,199] and MXenes [200].…”

An Ultrahigh Sensitive Paper-Based Pressure Sensor with Intelligent Thermotherapy for Skin-Integrated Electronics

“…The natural properties and porous microstructure of the paper provide the basic conditions for the realization of high-performance pressure sensors [ 37 ]. Some recent studies demonstrated that the conductive materials of a paper-based pressure sensor were embedded into the microstructure fiber paper using various preparation processes [ 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ]. For example, Tao et al proposed a pressure sensor fabricated by mixing the tissue paper with graphene oxide solution, whose performance indicated a pressure range of 20 kPa and a high sensitivity of 17.2 kPa −1 (0−2 kPa) [ 41 ].…”