Effect of Nanocolloids as an Ablation Medium on Structure and Morphology of Laser-generated Bimetallic Cu-Ni Nanoparticles

Effect of Nanocolloids as an Ablation Medium on Structure and Morphology of Laser-generated Bimetallic Cu-Ni Nanoparticles | 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 Effect of Nanocolloids as an Ablation Medium on Structure and Morphology of Laser-generated Bimetallic Cu-Ni Nanoparticles Monolina Chowdhury, Bibek Kumar Singh, Sudarshan Vadnala, Priyanka Dewangan, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7977165/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 21 Jan, 2026 Read the published version in Journal of Nanoparticle Research → Version 1 posted 10 You are reading this latest preprint version Abstract We report on the synthesis of bimetallic Cu-Ni nanoparticles (NPs) in deionized water (DIW) adopting two different methodologies: (i) laser ablation of Cu target in laser-generated Ni nanocolloids (abbreviated as M1 henceforth) and (ii) laser ablation of Ni target in laser-generated Cu nanocolloids (abbreviated as M2 henceforth). In both approaches, the resulting NPs show a homogeneous particle size distribution. Structural and morphological analysis using microscopic and spectroscopic techniques reveals the formation of different phases and nanostructures of NP in the samples. The Cu-Ni NPs generated using M2 show the formation of a core-shell (CS) structure in which the Cu reside at the core and the shell is composed of Ni oxide. However, in M1, solid Cu-Ni NP were assumed. The observed differences in morphology are attributed to the relative concentration of Cu and Ni, their interaction during pulsed laser ablation in liquid (PLAL) process, and their differences in nucleation rate and diffusion kinetics. The compositional analysis showed domination of Ni in both sample, which could be assumed due to higher stability of Ni based on its physical and thermodynamic properties. The optical results also confirm the formation of bimetallic Cu-Ni NP in both samples, which is in agreement with the structural analysis of the samples. Based on the experimental findings, a possible growth mechanism for the formation of different structures and morphologies of these NPs during PLAL is systematically discussed. Furthermore, this study evidenced the importance of a chemical interaction between nanocolloids (as ablation medium species) and ablated materials, and their influence on the cavitation bubble (CB) dynamics, which affects the formation mechanism and growth kinetics of NPs. PLAL Bimetallic Cu-Ni NPs Nanocolloids Structure Analysis Core-shell NP Full Text Additional Declarations No competing interests reported. Supplementary Files SupplementaryInformation.pdf Cite Share Download PDF Status: Published Journal Publication published 21 Jan, 2026 Read the published version in Journal of Nanoparticle Research → Version 1 posted Editorial decision: Revision requested 03 Dec, 2025 Reviews received at journal 19 Nov, 2025 Reviews received at journal 15 Nov, 2025 Reviewers agreed at journal 05 Nov, 2025 Reviewers agreed at journal 05 Nov, 2025 Reviewers agreed at journal 04 Nov, 2025 Reviewers invited by journal 04 Nov, 2025 Editor assigned by journal 02 Nov, 2025 Submission checks completed at journal 29 Oct, 2025 First submitted to journal 29 Oct, 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. 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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-7977165","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":540411193,"identity":"510df611-498b-4c22-8644-be104f5e5d03","order_by":0,"name":"Monolina Chowdhury","email":"","orcid":"","institution":"SRM University Sikkim","correspondingAuthor":false,"prefix":"","firstName":"Monolina","middleName":"","lastName":"Chowdhury","suffix":""},{"id":540411194,"identity":"8bf8aa89-8a04-48f8-acb9-53b5dd7d731d","order_by":1,"name":"Bibek Kumar Singh","email":"","orcid":"","institution":"Sikkim 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