Structural and surface studies of luminescent Ca/Eu phosphate nanomaterials: From the bulk to surface features Ivanchenko, Pavlo Escolano Casado, Guillermo Mino, Lorenzo Dassi, Luca Fernández Sánchez, Jorge Fernando Marta, Gianmario Gómez-Morales, Jaime Europium phosphate Hydroxyapatites Luminiscent nanomaterials Surface studies Three luminescent Eu-containing phosphate materials (Ca-doped europium phosphate monohydrate, Eu-doped carbonated-apatite, and europium phosphate monohydrate) were prepared and analyzed on the level of bulk structure and surface properties and compared to the biomimetic non-luminescent counterpart hydroxyapatite. Europium-containing phosphate materials exhibited nanosized dimensions but different luminescence emissions and luminescence lifetimes depending on their crystalline structures (i.e., lanthanide phosphate or apatites) and chemical composition. The introduction of Eu in the crystal lattice leads to a notable decrease in the overall Lewis acidity of the surface cationic sites detected by CO probing. Further, the mixed Eu/Ca-containing materials surfaces were found to be very similar to the reference hydroxyapatite in terms of water adsorption energy, while the pure europium phosphate resulted to have the notably higher energy values of direct interaction of water molecules with the surface cations with no detected propagation of this effect towards water overlayers. 2025-01-16T10:52:56Z 2025-01-16T10:52:56Z 2022-06-20 journal article Colloids and Surfaces B: Biointerfaces Volume 217, September 2022, 112620 https://hdl.handle.net/10481/99392 10.1016/j.colsurfb.2022.112620 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier