A 3D Printed Ethanol Sensor Using Conformally-Coated Conductive Polymer Electrodes

摘要

This work demonstrates, for the first time, conformal coating of conductive polymer electrodes onto PolyJet 3D printed structures to enable the fabrication of in-channel 3D electrodes for sensing applications. The reagent (3-Glycidoxypropyl) trimethoxysilane (GOPS) is used as the chemical material to crosslink carbon nanotube-doped poly(3,4ethyelenedioxythiophene) polystyrene sulfonate (CNT-PEDOT:PSS) to a variety of 3D printing materials. The conformally-coated electrodes are functionalized via electropolymerization of polyaniline (PANI), an ethanol sensitive material, to demonstrate a 3D printed ethanol sensor with a measured detection limit of ~0.19 %v/v. As such, this work opens up a new class of 3D printed sensing systems based on the conformal coating of conductive sensing material.