Multilayered\nAg NP–PEDOT–Paper Composite\nDevice for Human–Machine Interfacing

Abstract

Flexible pressure\nsensors have attracted increasing interest because\nof their potential applications on wearable sensing devices for human–machine\ninterface connections, but challenges regarding material cost, fabrication\nrobustness, signal transduction, sensitivity improvement, detection\nrange, and operation convenience still need to be overcome. Herein,\nwith a simple, low-cost, and scalable approach, a flexible and wearable\npressure-sensing device fabricated by utilizing filter paper as the\nsolid support, poly­(3,4-ethylenedioxythiophene) to enhance conductivity,\nand silver nanoparticles to provide a rougher surface is introduced.\nSandwiching and laminating composite material layers with two thermoplastic\npolypropylene films lead to robust integration of sensing devices,\nwhere assembling four layers of composite materials results in the\nbest sensitivity toward applied pressure. This practical pressure-sensing\ndevice possessing properties such as high sensitivity of 0.119 kPa^–1, high durability of 2000 operation cycles, and an\nultralow energy consumption level of 10^–5 W is a\npromising candidate for contriving point-of-care wearable electronic\ndevices and applying it to human–machine interface connections.