Graphene Episulfide : Covalent Sulfur Addition to Graphene Surfaces

Graphene Episulfide : Covalent Sulfur Addition to Graphene Surfaces | 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 Graphene Episulfide : Covalent Sulfur Addition to Graphene Surfaces Richard Martel, Simon Sprocq, Elie Hadad, Leonard Schue, Mohammed Amine-Mezour, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3562763/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 Graphene surfaces require chemical functionalization before it can be processed into graphene-based materials or used in device applications. Covalent addition reactions on graphene have been developed to build robust interfaces, but the chemistry at play builds on strategies involving either harsh oxidation or free radical attack, which generally offers poor control over reactivity and yields low coverage of grafts at the surface. Covalent addition of sulfur atoms onto the surface of graphene is here presented as an alternative strategy. Graphene episulfide is synthesized via a gas phase reaction in moderate conditions of temperature by a catalyst and solvent free protocol. Using Raman and photoemission spectroscopies, we demonstrate the presence of covalent bonds between sulfur atoms and graphene. By comparing the experimental results with ab-initio calculations of the vibrational and electronic states of models of graphene episulfide, a new interface mainly composed of sulfur bridges is proposed. The conditions to reach stoeichiometric ratios with sulfur approaching the theoretical limit is presented. Physical sciences/Materials science/Materials for devices/Electronic devices Physical sciences/Chemistry/Materials chemistry/Electronic materials Graphene graphene-based materials covalent functionalization sulfur chemistry episulfides radical addition surfaces and interfaces Full Text Additional Declarations Yes there is potential Competing Interest. Three of the authors (R.O.N., P.L. and R.M.) are inventors on US Patent 62/722,524 Supplementary Files GrSNatFormatSI.pdf 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-3562763","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":247893785,"identity":"948510da-469a-49a0-9701-fb7db171172b","order_by":0,"name":"Richard 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