Surface modification of Y2O3 nanoparticles.
Rare earth ion-doped yttrium oxide (Y2O3) nanocrystals are nontoxic and can be prepared as upconversion materials for cellular imaging, but they do not suspend well in water. In contrast to their tendency to dissolve in acidic media, yttria (Y2O3) nanoparticles readily react with phosphonic acids to give phosphonate-bonded yttria particles. Through the choice of phosphonic acid, the hydrophilicity of the nanoparticles can be controlled. The synthesis of a novel tetraethylene glycol-derived phosphonic acid is described; yttria treated with the corresponding phosphonate is easily dispersed in aqueous media. The preparation of yttria bonded to a phosphonate that may be used for cross coupling with biomolecules is also described.
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
Christopher A
CA
Traina
Jeffrey
J
Schwartz
D057927:Hydrophobic and Hydrophilic Interactions; D006900:Hydroxylation; D053768:Metal Nanoparticles / Q000737:chemistry*; D015394:Molecular Structure; D063065:Organophosphonates / Q000138:chemical synthesis / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013499:Surface Properties; D014867:Water / Q000737:chemistry; D015019:Yttrium / Q000737:chemistry*
D063065:Organophosphonates; D014867:Water; D015019:Yttrium; C091417:yttria