Natural bamboo leaves as dielectric layers for flexible capacitive pressure sensors with adjustable sensitivity and a broad detection range

Abstract

Capacitive pressure sensors based on bamboo leaves endow adjustable sensitivity, wide working range and remarkable stability, indicating promising applications in diverse application scenarios.

Recent Advances in Silver Nanowire Based Flexible Capacitive Pressure Sensors: From Structure, Fabrication to Emerging Applications

“…[42] On the other hand, human motion detection, such as finger bending, [27] voice recognition, [52] eye blinking, [42] and arm bending [103] was successfully demonstrated with the flexible pressure sensors, as displayed in Figure 12d-g. Furthermore, similar human motion detection was also detected with the AgNW based pressure sensors fabricated by Yao and Zhu [90] Cicek et al, [49] Li et al, [44] Nie et al, [56] Liu et al, [55] and Che et al [94] However, there is an uncertainty about long terms stability of the pressure sensors at daily working conditions, which needs more research and exploration in the future. [24]…”

“…[22] However, utilization of thin films of PMMA, PVP, PVDF and PI as well as commercial films including Parafilm, 3M VHB and cellulose tape were additionally demonstrated. [23,25,48,[52][53][54] Natural materials such as bamboo leaf [55] and dried rose petal [46] have-on the other hand-been employed owing to their microstructured form and biodegradability. To increase the sensitivity, porous dielectric materials like melamine sponge [49] and nanofiber membrane, [26] and ionic dielectric materials [42,56] were also investigated.…”

“…In addition, another approach for preparation of flexible electrode was shown via coating and transferring the AgNWs onto the PDMS substrate via vacuum filtration process. [55] Recently, Tang et al demonstrated flexible electrode fabrication via depositing the AgNWs on transparent wood film by Meyer rod coating. [45] The electrode microstructure and the ultimate flexible sensor is exhibited in Figure 3d,e.…”

“…Reproduced with permission. [55] Copyright 2021, Royal Society of Chemistry. layers is depicted in Figure 10a.…”

A wearable and high-performance capacitive pressure sensor based on a biocompatible PVP nanofiber membrane via electrospinning and UV treatment

“…Typical pressure sensors include piezoelectric sensors, 16,17 piezoresistive sensors, 18,19 and capacitive sensors. [20][21][22] Out of these sensors, the piezoelectric sensor can achieve high sensitivity, but its output direct current response is poor. The piezoresistive sensor is made up of low-cost sensing materials, which are not environmentally friendly.…”