Fabrication of a Bimetallic Au–Ag Nanoparticle-Based Photonic Chip via Excimer Laser Irradiation for Water Pollutant Detection and Enhanced Raman Sensing

Fabrication of a Bimetallic Au–Ag Nanoparticle-Based Photonic Chip via Excimer Laser Irradiation for Water Pollutant Detection and Enhanced Raman Sensing | 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 Fabrication of a Bimetallic Au–Ag Nanoparticle-Based Photonic Chip via Excimer Laser Irradiation for Water Pollutant Detection and Enhanced Raman Sensing Mohadeseh Arabi, Somayeh Panahibakhsh, Maryam Aliannezhadi This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7337044/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 This paper presents the fabrication of photonic chips incorporating gold-silver (Au-Ag) bimetallic nanoparticles via a laser-induced method. Thin films of Au-Ag were deposited on polycarbonate substrates and subsequently irradiated with an ArF excimer laser. During laser exposure, an external electric field of 10 5 V/m was applied to study its influence on nanostructure formation. The morphological development and properties of the resulting nanostructures were systematically investigated under both the presence and absence of the electric field. The results show that the diameters of the fabricated nanostructures in both conditions predominantly ranged from 40 to 100 nm. Notably, the application of the external electric field promoted the formation of larger linear clusters compared to samples formed without the electric field. Raman spectroscopy of a low concentration (10⁻⁴ M) Rhodamine B solution in the presence of bimetallic nanoparticles fabricated without the electric field demonstrated excellent Surface-Enhanced Raman Spectrum and SERS activity. Furthermore, optical sensing tests for water pollutant detection confirmed the suitability of both samples, with sensitivities of 933.5 nm/RIU and 663.1 nm/RIU for nanostructures produced without and with the external electric field, respectively. Physical sciences/Materials science Physical sciences/Nanoscience and technology Physical sciences/Optics and photonics Physical sciences/Physics ArF excimer Laser Localized surface plasmon resonance (LSPR) Au-Ag plasmonic Nanostructures Surface Enhanced Raman Spectroscopy(SERS) water pollutant detection Full Text Additional Declarations No competing interests reported. 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. 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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-7337044","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":505144071,"identity":"c4c062db-4805-4722-8d80-ebfe3e9ad667","order_by":0,"name":"Mohadeseh Arabi","email":"","orcid":"","institution":"Semnan University","correspondingAuthor":false,"prefix":"","firstName":"Mohadeseh","middleName":"","lastName":"Arabi","suffix":""},{"id":505144072,"identity":"432f24bb-93b9-4415-8ff6-b0a7b715994e","order_by":1,"name":"Somayeh Panahibakhsh","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA4UlEQVRIiWNgGAWjYJACZgYDICnBfABEypCihS0BRPIQqYUBrBikkYGwFnP2swc/FxQw2JtL93x+daPGgoeB/fDRDfi0WPbkJUvPMGBI3Dnn7DbrnGNAh/Gkpd3Ap8XgQI6BNNBJCQY3crcZ57ABtUjwmOHXcv6N8W+gFnuDGznPjHP+EaPlRo4ZyBbGDTdymB/nthGhxXLGGzNrHgMJoF+OmTHn9knwsBHyizl/jvFtnj82wBBrfvw551udHD/74WP4HQahJEAMNgkQkw2fciQtYAbzB0KqR8EoGAWjYGQCAEqQQKtAqWF0AAAAAElFTkSuQmCC","orcid":"","institution":"Nuclear Science and Technology Research Institute","correspondingAuthor":true,"prefix":"","firstName":"Somayeh","middleName":"","lastName":"Panahibakhsh","suffix":""},{"id":505144074,"identity":"04e3a809-d291-4632-a16e-72795ddeb806","order_by":2,"name":"Maryam Aliannezhadi","email":"","orcid":"","institution":"Semnan University","correspondingAuthor":false,"prefix":"","firstName":"Maryam","middleName":"","lastName":"Aliannezhadi","suffix":""}],"badges":[],"createdAt":"2025-08-10 06:08:14","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-7337044/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7337044/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":91404292,"identity":"87dc1087-c568-426a-8e73-da644e03d180","added_by":"auto","created_at":"2025-09-16 07:38:43","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1341500,"visible":true,"origin":"","legend":"","description":"","filename":"watersensor5141.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7337044/v1_covered_5032f842-f9e8-4f3c-84b9-ca0293eae819.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Fabrication of a Bimetallic Au–Ag Nanoparticle-Based Photonic Chip via Excimer Laser Irradiation for Water Pollutant Detection and Enhanced Raman Sensing","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"ArF excimer Laser, Localized surface plasmon resonance (LSPR), Au-Ag plasmonic Nanostructures, Surface Enhanced Raman Spectroscopy(SERS), water pollutant detection","lastPublishedDoi":"10.21203/rs.3.rs-7337044/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7337044/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis paper presents the fabrication of photonic chips incorporating gold-silver (Au-Ag) bimetallic nanoparticles via a laser-induced method. 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