N,S-Co-Doped Carbon Dots as Fluorescent Probes with Dual Functionality for the Detection of Picric Acid and Antibacterial Properties

N,S-Co-Doped Carbon Dots as Fluorescent Probes with Dual Functionality for the Detection of Picric Acid and Antibacterial Properties | 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 N,S-Co-Doped Carbon Dots as Fluorescent Probes with Dual Functionality for the Detection of Picric Acid and Antibacterial Properties Jie Wang, Huihui Ma, Yang Wang, Cuihua Hu, Fengwen Yan, Qi Wang, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7005457/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 01 Dec, 2025 Read the published version in Chemical Papers → Version 1 posted 5 You are reading this latest preprint version Abstract Carbon dots co-doped with nitrogen and sulfur (N,S-CDs) are produced from polyethyleneimine (PEI) and thiourea through a simple one-pot hydrothermal technique. The N,S-CDs demonstrate a significant luminescent emission, achieving a fluorescence quantum yield of 60.88%.The addition of picric acid result in a reduction of the emission. The quenching mechanism is attributed to the inner filter effect. The linear detection range for picric acid is 0–300 μmol/L, with a detection limitation of 28 nmol/L. N,S-CDs also display strong antibacterial activity and low toxicity.This work demonstrates that N,S-CDs possess substantial value in the detection of picric acid as well as in the advancement of antibacterial materials. carbon dots heteroatom doping fluorescent probe picric acid antibacterial materials Full Text Supplementary Files Supportinginformation.pdf Cite Share Download PDF Status: Published Journal Publication published 01 Dec, 2025 Read the published version in Chemical Papers → Version 1 posted Reviewers agreed at journal 25 Jul, 2025 Reviewers invited by journal 25 Jul, 2025 Editor invited by journal 07 Jul, 2025 Editor assigned by journal 30 Jun, 2025 First submitted to journal 29 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. 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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-7005457","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":490693018,"identity":"61ded210-4bbb-4c7d-b2d0-d1acd1d7cf7c","order_by":0,"name":"Jie Wang","email":"","orcid":"","institution":"Qiqihar Medical College: Qiqihar Medical University","correspondingAuthor":false,"prefix":"","firstName":"Jie","middleName":"","lastName":"Wang","suffix":""},{"id":490693019,"identity":"61fa0157-3608-43b4-9bd4-ef62be8ab12f","order_by":1,"name":"Huihui Ma","email":"","orcid":"","institution":"Qiqihar Medical College: Qiqihar Medical 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