Rapid-Response Flexible Gas Sensor Based on Porous MXene/In₂O₃ Composites with Integrated Heating for NO₂ Detection

Rapid-Response Flexible Gas Sensor Based on Porous MXene/In₂O₃ Composites with Integrated Heating for NO₂ Detection | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Rapid-Response Flexible Gas Sensor Based on Porous MXene/In₂O₃ Composites with Integrated Heating for NO₂ Detection Gaobin Xu, Baichuan Sun, Hongda Liu, Cunhe Guan, Shirong Chen, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7882018/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Accurate and rapid detection of NO₂ is critical for environmental monitoring and human health protection, yet conventional gas sensors often exhibit slow response and recovery, high power consumption due to elevated operating temperatures, and limited integration, typically relying on external heating rather than on-chip thermal control. Here, we demonstrate a flexible NO₂ sensor based on a porous MXene (PM)/In₂O₃ composite, featuring a hierarchical porous architecture and fully integrated design for low-temperature operation. The sensor achieves an ultrafast dynamic response, with response and recovery times of 1.3 s and 3.5 s, enabling real-time detection of transient NO₂ exposure. Its high specific surface area (91.3 m²/g) facilitates abundant active sites and rapid gas adsorption and diffusion, enhancing both sensitivity and response speed. Moreover, the integrated interdigital and heating electrodes on a single flexible substrate minimize power consumption and support miniaturized, chip-compatible sensing platforms. The device exhibits a high response of 42.41 at 100 ppm NO₂, together with excellent selectivity, repeatability, and mechanical stability, offering a promising strategy for next-generation flexible and intelligent gas sensors with ultrafast, energy-efficient, and reliable performance. Physical sciences/Engineering/Electrical and electronic engineering Physical sciences/Materials science/Materials for devices/Sensors and biosensors Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplementaryInformation.pdf Rapid-Response Flexible Gas Sensor Based on Porous MXene/In₂O₃ Composites with Integrated Heating for NO₂ Detection Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7882018","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":532488252,"identity":"968bd992-ac56-4006-87da-bc636e8354e9","order_by":0,"name":"Gaobin 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