Re-crystallization in Glass Supported MgO Quantum Dot Doped PMMA Film: Effect of Annealing Hours and Composition

Re-crystallization in Glass Supported MgO Quantum Dot Doped PMMA Film: Effect of Annealing Hours and Composition | 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 Re-crystallization in Glass Supported MgO Quantum Dot Doped PMMA Film: Effect of Annealing Hours and Composition Satya Pal Singh, Archana Singh, Suraj Vishwakarma This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4299692/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 02 Jan, 2025 Read the published version in Scientific Reports → Version 1 posted 10 You are reading this latest preprint version Abstract We have blended MgO nanoparticles with Poly (methyl methacrylate) thin films by solution casting method. MgO nanoparticles are doped in 5 wt %, 10 wt % and 15 wt % in PMMA film, and annealed for 02, 04, 06, 08, 10, 12, 14, 20, 24 and 28 hours at 130 0 C. We have comprehensively investigated the molecular scale re-structuring and morphological evolution of the composite films and have accounted reasons based on the observations made on chemical bonding, crystallinity, bandgap, Urbach energy, and fluorescence and Raman spectra. We observe that the film loses its overall crytallinity in initial stages of annealing which latter improves slightly owing to the temperature induced limited diffusion of MgO QDs (sizes in the range of 7.0603 nm-9.5647 nm). The limited diffusion of MgO QDs allows for the formation of larger clusters, which in turn affects the local crystallinity of the composite films. We report local scale re-crystallization. We have discussed the role of competing forces. Evolution of nano-micro scale structures inside the films are governed by the reconciliation between inter and intra-molecular forces. The temperature of the film plays an intermediate role facilitating the whole process. To get molecular scale insights, we have estimated crystallinity, bandgap and Urbach energy of the pure and hybrid films. Dispersed MgO nanoparticles diffuse locally and nucleate to form larger spherical clusters. Anchoring of MgO nanoparticles on PMMA surface and vice-versa appears to provide thermal stability and mechanical strength to the nanocomposite films, as MgO nanoparticle doped PMMA film appears to form nano-micron-size particulates of PMMA. Contradictory to that, the overall crystallinity of the hybrid film drastically falls as the formation of boundaries, interfaces and voids overwhelms the whole process. Formation of larger nano-aggregates at latter stages of annealing slightly improves the crystallinity of the film. Estimation of bandgap and Urbach energy calculation confirm for the same. The micro-level phenomenological understanding of the diffusion process of nanodots in solid film atmosphere is technically important for ensuring the sustainability of such nanocomposites, which goes through a heating process. Bandgap Urbach Energy Diffusion in Solid Films Nucleation Local crystallization Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 02 Jan, 2025 Read the published version in Scientific Reports → Version 1 posted Editorial decision: Revision requested 26 Aug, 2024 Reviews received at journal 09 Aug, 2024 Reviewers agreed at journal 31 Jul, 2024 Reviews received at journal 24 Jul, 2024 Reviewers agreed at journal 14 Jul, 2024 Reviewers invited by journal 03 May, 2024 Editor assigned by journal 03 May, 2024 Editor invited by journal 26 Apr, 2024 Submission checks completed at journal 26 Apr, 2024 First submitted to journal 21 Apr, 2024 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. 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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-4299692","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":333743259,"identity":"d3680ac6-8242-4b1b-a0d8-fc705a2d8e29","order_by":0,"name":"Satya Pal Singh","email":"data:image/png;base64,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","orcid":"","institution":"Madan Mohan Malaviya University of Technology","correspondingAuthor":true,"prefix":"","firstName":"Satya","middleName":"Pal","lastName":"Singh","suffix":""},{"id":333743260,"identity":"de9b23b3-0d0b-4df9-ae71-bbfdcf72a754","order_by":1,"name":"Archana Singh","email":"","orcid":"","institution":"Madan Mohan Malaviya University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Archana","middleName":"","lastName":"Singh","suffix":""},{"id":333743262,"identity":"08a8253d-c5b2-4c19-af34-fd3f0b0e0781","order_by":2,"name":"Suraj Vishwakarma","email":"","orcid":"","institution":"Madan Mohan Malaviya University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Suraj","middleName":"","lastName":"Vishwakarma","suffix":""}],"badges":[],"createdAt":"2024-04-21 06:59:22","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4299692/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4299692/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1038/s41598-024-80652-3","type":"published","date":"2025-01-02T15:57:04+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":73093202,"identity":"816bfc41-1264-4c6c-b873-fa7eae1c715f","added_by":"auto","created_at":"2025-01-06 16:10:32","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":3556106,"visible":true,"origin":"","legend":"","description":"","filename":"ManuscriptMgOPMMA.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4299692/v1_covered_50bd3238-653e-422c-b4fc-e801c3a14138.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Re-crystallization in Glass Supported MgO Quantum Dot Doped PMMA Film: Effect of Annealing Hours and Composition","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":"scientific-reports","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"scirep","sideBox":"Learn more about [Scientific Reports](http://www.nature.com/srep/)","snPcode":"","submissionUrl":"","title":"Scientific Reports","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Scientific Reports","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"Bandgap, Urbach Energy, Diffusion in Solid Films, Nucleation, Local crystallization","lastPublishedDoi":"10.21203/rs.3.rs-4299692/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4299692/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eWe have blended MgO nanoparticles with Poly (methyl methacrylate) thin films by solution casting method. MgO nanoparticles are doped in 5 wt %, 10 wt % and 15 wt % in PMMA film, and annealed for 02, 04, 06, 08, 10, 12, 14, 20, 24 and 28 hours at 130 \u003csup\u003e0\u003c/sup\u003eC. We have comprehensively investigated the molecular scale re-structuring and morphological evolution of the composite films and have accounted reasons based on the observations made on chemical bonding, crystallinity, bandgap, Urbach energy, and fluorescence and Raman spectra. We observe that the film loses its overall crytallinity in initial stages of annealing which latter improves slightly owing to the temperature induced limited diffusion of MgO QDs (sizes in the range of 7.0603 nm-9.5647 nm). The limited diffusion of MgO QDs allows for the formation of larger clusters, which in turn affects the local crystallinity of the composite films. We report local scale re-crystallization. We have discussed the role of competing forces. 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Estimation of bandgap and Urbach energy calculation confirm for the same. 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