Enhanced Nitrogen Dioxide Detection Using Resistive Graphene-Based Electronic Sensors Modified with Polymers of Intrinsic Microporosity.

ABSTRACT: In this study, we report on the fabrication and evaluation of gas sensing performance for 3 × 3 graphene pixel array sensors coated with polymers of intrinsic microporosity (PIM-1 and PIM-EA-TB) and Matrimid, a commercial polyimide, for the detection of nitrogen dioxide (NO₂). The polymer films, with thicknesses of only 9-11 nm, significantly enhanced the gas sensing performance, demonstrating responses as high as -25.7% compared to a bare graphene response of -10.8%. The gas sensing performance was evaluated in real-time by exposing the sensors to NO₂ concentrations from 1 to 50 ppm, along with selectivity tests using ammonia (NH₃), nitric oxide (NO), methane (CH₄), and carbon dioxide (CO₂). In addition to their high sensitivity, the

SUBMITTER: Goodwin DM 

PROVIDER: S-EPMC11877633 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature