Electrospun Fe–Mn/PAN Composite Nanofibers for Enhanced UV Photodetection: Structural and Bandgap Modulation

Electrospun Fe–Mn/PAN Composite Nanofibers for Enhanced UV Photodetection: Structural and Bandgap Modulation | 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 Research Article Electrospun Fe–Mn/PAN Composite Nanofibers for Enhanced UV Photodetection: Structural and Bandgap Modulation Raoof. A. Ahmed, Abdullah Alaliaan, Ahmed J. NOORI, Issam. M. Ibrahim, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8524834/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 18 Mar, 2026 Read the published version in Optical and Quantum Electronics → Version 1 posted 4 You are reading this latest preprint version Abstract Electrospun polyacrylonitrile (PAN) nanofibers are robust, flexible, and easy to fabricate; however, their wide optical bandgap makes them undesirable for use in ultraviolet (UV) optoelectronic devices. This study demonstrates the enhancement of PAN nanofibers by incorporating transition-metal oxides, specifically iron and manganese, to alter their electronic structure and improve optoelectronic performance. Electrospun Fe–Mn/PAN composite nanofibers were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, UV-visible spectroscopy, and current-voltage measurements to examine their morphology. The findings indicate that the addition of iron and manganese markedly diminished the fiber diameter from 245.5 nm to 145.2 nm. It also enhanced crystallinity from 44.4% to 50.7% and lowered the optical bandgap from 4.2 eV to 3.65 eV. Further, these changes introduced defects and electronic states, improving photoconductive response and photocurrent. The modified nanofibers performed optimally in optoelectronics than the unmodified PAN. The results indicate that Fe–Mn/PAN composite nanofibers are promising materials for UV photodetectors and other optoelectronic applications, enabling enhanced functionality and broader adoption. PAN polymer nanofibers Transition metal Cyclisation Photodetector Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 18 Mar, 2026 Read the published version in Optical and Quantum Electronics → Version 1 posted Editorial decision: Revision requested 06 Jan, 2026 Editor assigned by journal 06 Jan, 2026 Submission checks completed at journal 06 Jan, 2026 First submitted to journal 05 Jan, 2026 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. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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-8524834","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":570386180,"identity":"5c73041d-14e5-45d2-8718-9109cecb11fb","order_by":0,"name":"Raoof. A. 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Modulation","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"optical-and-quantum-electronics","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"oqel","sideBox":"Learn more about [Optical and Quantum Electronics](https://www.springer.com/journal/11082)","snPcode":"11082","submissionUrl":"https://submission.nature.com/new-submission/11082/3","title":"Optical and Quantum Electronics","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer 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