title: Oleic acid-modified LiYF4:Er,Yb nanocrystals for potential optical-amplification applications.
abstract: LiYF4:18%Yb, 2%Er nanocrystals and NaYF4:18%Yb,2% Er nanoparticles (NCs) were synthesized by a solvothermal approach using oleic acid (OA) as the surfactant. With the excitation of a 980 nm diode laser, LiYF4:18%Yb, 2%Er NCs exhibit more strong emission than alpha-NaYF4:18%Yb, 2%Er at around 1530 nm. The TEM images showed that the LiYF4:18%Yb, 2%Er NCs have a nearly spherical shape and the size is about 15 nm. The OA-capped LiYF4 NCs have excellent dispersibility in organic solvents. These results showed that LiYF4:18%Yb, 2%Er NCs are a promising material for polymer-based optical waveguide amplifiers.
authors.forename: Shusen
authors.initials: S
authors.lastname: Liu
authors.forename: Xingyuan
authors.initials: X
authors.lastname: Guo
authors.forename: Xuesong
authors.initials: X
authors.lastname: Zhai
authors.forename: Dan
authors.initials: D
authors.lastname: Zhao
authors.forename: Kezhi
authors.initials: K
authors.lastname: Zheng
authors.forename: Guanshi
authors.initials: G
authors.lastname: Qin
authors.forename: Weiping
authors.initials: W
authors.lastname: Qin