Green Synthesis of Highly Fluorescent Carbon quantum Dots using Sweet Lemon Juice

Green Synthesis of Highly Fluorescent Carbon quantum Dots using Sweet Lemon Juice | 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 Short Report Green Synthesis of Highly Fluorescent Carbon quantum Dots using Sweet Lemon Juice Laxmi Mehra, Meenakshi Rana, Shradha Lakhera, Deepak Butola, L P Purohit, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7008200/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 4 You are reading this latest preprint version Abstract Green synthesis of Carbon Quantum Dots (CQDs) has gained a lot of interest due to their wide applications in various fields such as biomedical and optoelectronic devices. In the present study, highly fluorescent CQDs are synthesized using a natural precursor sweet lemon through a simple one-pot hydrothermal method. The resulting CQDs exhibited green fluorescence under a UV source and a high quantum yield of 9.28% at the excitation wavelength 370 nm. The synthesized CQDs showed good solubility and stability because of the oxygenated groups present on the surface confirmed by X-ray photoelectron Spectroscopy and zeta potential. The X-ray diffraction, Scanning Electron Microscopy and Dynamic light scattering indicated that the CQDs are spherical in shape, possess amorphous or poor crystalline nature and the particle size varies between 5–22 nm with an average diameter of 10 nm. Carbon Quantum Dots Sweet lemon Quantum yield Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 23 Jul, 2025 Editor assigned by journal 03 Jul, 2025 Submission checks completed at journal 03 Jul, 2025 First submitted to journal 30 Jun, 2025 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-7008200","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Short Report","associatedPublications":[],"authors":[{"id":489724832,"identity":"13449352-85e0-4766-b8ed-27f77ed1951e","order_by":0,"name":"Laxmi Mehra","email":"","orcid":"","institution":"Uttarakhand Open University","correspondingAuthor":false,"prefix":"","firstName":"Laxmi","middleName":"","lastName":"Mehra","suffix":""},{"id":489724833,"identity":"b147bb6e-3ae1-4fb3-8071-52a18f5243d3","order_by":1,"name":"Meenakshi Rana","email":"","orcid":"","institution":"Uttarakhand Open 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