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Synthesis and characterisation of Gd2O3 nanocrystals functionalised by organic acids
Fredrik Söderlind1, Henrik Pedersen, Rodrigo M Petoral
1Division of Chemistry, Department of Physics and Measurement Technology (IFM), Linköping University, SE-581 83 Linköping, Sweden. fsoderlind@yahoo.se
Abstract:
Nanocrystals of Gd2O3 have been prepared by various methods, using, e.g., trioctylphosphine oxide (TOPO), diethylene glycol (DEG) or glycine. The crystalline particles were of sizes 5 to 15 nm. Different carboxylic acids, e.g., oleic acid or citric acid, were adsorbed onto the surface of the particles made with DEG. IR measurements show that the molecules coordinate to the Gd2O3 surface via the carboxylate group in a bidentate or bridging manner. The organic-acid/particle complexes were characterised by XRPD, TEM, FTIR, Raman, and XPS.