Tunable Magnetic Properties of (Gd,Ce)₂O₂S Oxysulfide Nanoparticles

Abstract

Nanoparticles with strong paramagnetic responses are of prime interest for advanced MRI imaging. To replace expensive and toxic Gd complexes, Gd-based nanoparticles have emerged as a viable solution for efficient and harmless MRI contrast agents. Gadolinium oxysulfide nanoparticles could represent suitable candidates for MRI imaging and bimodal imaging thanks to their excellent properties as host matrix and chemical stability, but their magnetic properties at the nanoscale have been hitherto poorly investigated especially in the case of ultrafine nanoparticles (< 10 nm), where surface effects and ligands can significantly affect the magnetic behavior. In the present work, we synthesized and characterized bimetallic [a]

PVP-coated ultrasmall Nd-doped Gd2O2S nanoparticles for multimodal imaging

“…S12, ESI †). Even when studying pure ultrasmall Gd 2 O 2 S, Larquet et al 28 did not detect any blocking temperature. Besides, the FC and ZFC curves of our Gd 0.8 Nd 1.2 O 2 S sample are virtually identical which indicates the absence of superparamagnetism, and are well fitted by the Curie law.…”

Metal Oxysulfides: From Bulk Compounds to Nanomaterials

“…The thermal stability of the nanoparticles was investigated under inert and oxidizing atmosphere, highlighting the possibility to remove the oleate surface ligands by a mild thermal treatment (Larquet et al, 2019a). Moreover, both magnetic properties (Larquet et al, 2019b) and optical ones (bandgap) (Larquet et al, 2019c) could be tuned as a function of the Gd:Ce ratio.…”

Nagoya‐Medaillen: C. R. Bertozzi und M. Kanai / Clara‐Immerwahr‐Preis: S. Carenco / Adolf‐Lieben‐Vorlesung: I. Marek

“…Dieses Jahr geht der Preis an

Sophie Carenco (Sorbonne Université, Paris; Frankreich), über die in dieser Rubrik anlässlich ihrer CNRS‐Bronzemedaille 2018 berichtet wurde . Carenco hatte einen Beitrag über die radikalische Dismutation von Hydrosiloxanen im ChemCatChem ‐Themenheft “Women of Catalysis”, und sie war mit einem Full Paper über einstellbare magnetische Eigenschaften von Gadolinium‐Cer‐Oxysulfid‐Nanopartikeln auf dem Titelbild des European Journal of Inorganic Chemistry vertreten …”