title: Intense visible multicolored luminescence from lanthanide ion-pair codoped NaGdF₄ nanocrystals.
abstract: Lanthanide ion-pair (Eu(3+)/Tb(3+), Dy(3+)/Tb(3+), Sm(3+)/Tb(3+) and Eu(3+)/Dy(3+)) codoped NaGdF(4) nanocrystals using Ce(3+) as the sensitizer were prepared via the polyol method. The nanocrystals with different codoped lanthanide ion-pairs retain their individual optical properties and the combined spectra can be detected using single-wavelength excitation at about 251 nm. The combined spectra intensity ratios can be adjusted through control of the doping ions molar ratios. Excited with a UV lamp at 254 nm, the as-prepared nanocrystals in aqueous solution emit intense visible emissions of different colors. The nanocrystals were coated with SiO(2), to make them biocompatible.
authors.affiliation: Department of Chemistry, Northeastern University, Shenyang, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.forename: Meng
authors.initials: M
authors.lastname: Wang
authors.forename: Shukun
authors.initials: S
authors.lastname: Xu
authors.forename: Hongyan
authors.initials: H
authors.lastname: Zhang
mesh_terms: D005682:Gadolinium / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D049449:Luminescence; D008163:Luminescent Measurements; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D033362:Powder Diffraction; D013499:Surface Properties
chemical_list: D007477:Ions; D028581:Lanthanoid Series Elements; D005682:Gadolinium