64790 2025 eng 18492 18507 35 13 article Royal Society of Chemistry (RSC) 1 -- -- -- Gadolinium oxysulfide (Gd2O2S) is an attractive material of demonstrated suitability for a variety of imaging applications, leveraging its magnetic, scintillating, and luminescent properties, particularly when doped with optically active lanthanide ions (Ln3+). For many of these applications, control over size and morphology at the nanoscale is crucial. This study demonstrates the rapid microwave-assisted Synthesis of colloidal Ln2O2S (Ln = Gd and dopants Yb, Er, Tb) nanostructures in as little as 20 min. Structural characterization using X-ray diffraction analysis (XRD), Raman spectroscopy, as well as Transmission electron microscopy (TEM), including elemental mapping via energy dispersive X-ray spectroscopy (EDS), unveiled the key role of elemental sulphur (S8) in the reaction mixtures for materials growth. By systematically varying the Ln-to-S ratio from 1 : 0.5 to 1 : 15, controlled morphologies ranging from triangular nanoplatelets to berry- and flower-like shapes were achieved. Doping with Er3+/Yb3+ endowed the nano-triangles with upconverting and near-infrared emitting properties. Tb3+-doped Gd2O2S exhibited the characteristic green Tb3+ emission under UV excitation, while also showing X-ray excited optical luminescence (XEOL), rendering the material interesting as a potential nano-scintillator. Journal of Materials Chemistry C 2050-7526 10.1039/D5TC01646K urn:nbn:de:kobv:b43-647907 true journal-article http://creativecommons.org/licenses/by/3.0/ crossref PersonAuthorFirstName_1,PersonAuthorLastName_1,PersonAuthorIdentifierOrcid_1,PersonAuthorFirstName_2,PersonAuthorLastName_2,PersonAuthorFirstName_3,PersonAuthorLastName_3,PersonAuthorIdentifierOrcid_3,PersonAuthorFirstName_4,PersonAuthorLastName_4,PersonAuthorFirstName_5,PersonAuthorLastName_5,PersonAuthorIdentifierOrcid_5,PersonAuthorFirstName_6,PersonAuthorLastName_6,PersonAuthorIdentifierOrcid_6,PersonAuthorFirstName_7,PersonAuthorLastName_7,PersonAuthorIdentifierOrcid_7,PersonAuthorFirstName_8,PersonAuthorLastName_8,PersonAuthorIdentifierOrcid_8,PersonAuthorFirstName_9,PersonAuthorLastName_9,PersonAuthorIdentifierOrcid_9,PersonAuthorFirstName_10,PersonAuthorLastName_10,PersonAuthorIdentifierOrcid_10,PublisherName,TitleMain_1,Language,TitleAbstract_1,TitleParent_1,PageFirst,PageLast,Issue,Volume,PublishedYear,IdentifierIssn,Enrichmentlocal_crossrefLicence doi-import 20.11.2025 false true Creative Commons - CC BY - Namensnennung 4.0 International Christian Homann Régis Peeters Hana Mirmajidi Jessica Berg Michael Fay Lucas Carvalho Veloso Rodrigues Eros Radicchi Akhil Jain Adolfo Speghini Eva Hemmer eng uncontrolled Upconversion eng uncontrolled Microwave-assisted synthesis eng uncontrolled Synthesis eng uncontrolled Fluorescence eng uncontrolled Nano eng uncontrolled Particle eng uncontrolled NIR eng uncontrolled XRD eng uncontrolled X-ray fluoressence eng uncontrolled Morphology control eng uncontrolled Raman Analytische Chemie Ingenieurwissenschaften und zugeordnete Tätigkeiten Sanitär- und Kommunaltechnik; Umwelttechnik 1 Analytische Chemie; Referenzmaterialien 1.2 Biophotonik Umwelt Material Chemie und Prozesstechnik Chemische Charakterisierung und Spurenanalytik Verlagsliteratur Datei für die Öffentlichkeit verfügbar ("Open Access") Wissenschaftliche Artikel der BAM Advanced Materials Materialdesign Bundesanstalt für Materialforschung und -prüfung (BAM) https://opus4.kobv.de/opus4-bam/files/64790/Homann et al - Rapid MW-assisted synthesis of Gd2O2S nanostructures.pdf https://opus4.kobv.de/opus4-bam/files/64790/Homann et al - Rapid MW-assisted synthesis of Gd2O2S nanostructures_SI.pdf