A general synthesis method for small-size and water-soluble NaYF₄:Yb, Ln upconversion nanoparticles at high temperature.

ABSTRACT: In this work, we developed a general synthesis method for the water-soluble lanthanide ion-doped NaYF₄ upconversion (UC) nanoparticles (NPs) using triethylene glycol (TEG) as a high temperature solvent and diacid as a surfactant. Since the boiling point of the TEG is as high as 289.4 °C, the synthesis temperature can be correspondingly increased to a higher temperature that is a bit lower than this one. Therefore, water-soluble UCNPs with a small size (<50 nm) can be easily prepared. The nanocrystal growth temperature could be elevated from 180 °C to 285 °C due to the superiority of the high-temperature polar solvent environment introduced in this work. The temperature-dependent nanocrystal growth mechanism and luminescent properties of UCNPs are deeply explored. Different chain

SUBMITTER: Liu M 

PROVIDER: S-EPMC11626383 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature