TY  - JOUR
A1  - Homann, Christian
A1  - Peeters, Régis
A1  - Mirmajidi, Hana
A1  - Berg, Jessica
A1  - Fay, Michael
A1  - Rodrigues, Lucas Carvalho Veloso
A1  - Radicchi, Eros
A1  - Jain, Akhil
A1  - Speghini, Adolfo
A1  - Hemmer, Eva
T1  - Rapid microwave-assisted synthesis of morphology-controlled luminescent lanthanide-doped Gd<sub>2</sub>O<sub>2</sub>S nanostructures
JF  - Journal of Materials Chemistry C
N2  - 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.
KW  - Upconversion
KW  - Microwave-assisted synthesis
KW  - Synthesis
KW  - Fluorescence
KW  - Nano
KW  - Particle
KW  - NIR
KW  - XRD
KW  - X-ray fluoressence
KW  - Morphology control
KW  - Raman
PY  - 2025
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:b43-647907
DO  - https://doi.org/10.1039/D5TC01646K
SN  - 2050-7526
VL  - 13
IS  - 35
SP  - 18492
EP  - 18507
PB  - Royal Society of Chemistry (RSC)
AN  - OPUS4-64790
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -