Tailoring the Optoelectronic Properties of MoOX Nanoparticles: A Novel Microwave-Assisted Synthesis for Near-Infrared Absorbing Polyoxometallic Clusters

Tailoring the Optoelectronic Properties of MoOX Nanoparticles: A Novel Microwave-Assisted Synthesis for Near-Infrared Absorbing Polyoxometallic Clusters | 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 Tailoring the Optoelectronic Properties of MoOX Nanoparticles: A Novel Microwave-Assisted Synthesis for Near-Infrared Absorbing Polyoxometallic Clusters Daniel Truchan, Adriana Hvizdošová Annušová, Guilhem Curé, Matej Mičušík, and 9 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6675081/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 05 Nov, 2025 Read the published version in Discover Nano → Version 1 posted 9 You are reading this latest preprint version Abstract Emergence of novel catalytic, electrochemical and biomedical applications of nanomaterials necessitates an understanding of the structural basis of their stimuli-responsive performance. Chemistry of polyoxometallic nanomaterials with variety of interesting properties is still poorly explored. In this study, the microwave-assisted non-aqueous sol-gel synthesis was used for the first time to prepare nanoparticles based on polyoxomolybdates. Their optoelectronic properties with the focus on laser-triggered photothermal response were investigated in detail depending on the synthesis temperature. Striking differences were observed between the products prepared from the same precursor according to fast protocol by varying the temperature of synthesis. Only low-temperature synthesis (≤90°C) provided near-infrared (NIR) photothermally active MoOX nanoclusters. The regular packing with large lattice defects of these clusters and low reduction degree allow penetration of water molecules into the cluster and their interactions with surface Mo=O bonds along with formation of intermediate electron states in the bandgap. The intermediate electron states are responsible for the NIR-laser response suitable for photothermia. In addition, the NIR response can be modulated in a controlled manner even after the complete synthesis by the electrochemical impedance spectroscopy. These results have direct implications for MoOX photothermal therapy, tailored defect engineering of polyoxomolybdate structures and their electrochemical and biological applications. Full Text Additional Declarations No competing interests reported. Supplementary Files SITruchanetal.pdf Cite Share Download PDF Status: Published Journal Publication published 05 Nov, 2025 Read the published version in Discover Nano → Version 1 posted Editorial decision: Revision requested 25 Jun, 2025 Reviews received at journal 23 Jun, 2025 Reviewers agreed at journal 23 Jun, 2025 Reviews received at journal 19 Jun, 2025 Reviewers agreed at journal 29 May, 2025 Reviewers invited by journal 29 May, 2025 Editor assigned by journal 16 May, 2025 Submission checks completed at journal 16 May, 2025 First submitted to journal 15 May, 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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