Abstract
This work aims to fabricate polyethylenimine (PEI)-polyethylene glycol (PEG)/multi-walled carbon nanotubes (MWCNTs) bilayer-structure devices for CO2 gas sensors. The devices are composed of two layers; the first layer is made of MWCNTs, which act as the electron transport layer, whereas the second layer is made of PEI-PEG blender which can functionalize MWCNTs and acts as the CO2 adsorption material. Both layers are sequentially spray-coated on the screen-printed carbon electrodes. After functionalization, the resistance of the device is increased due to the functionalization effect by the PEI-PEG blender. Using air as background gas, the bilayer-structure devices provide 3.25% sensitivity under 5 vol% CO2. Moreover, the devices show excellent stability and reversibility under multiple cycle tests for 400 min.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
