title: Multifunctional nanoparticles based on the Nd³⁺/Yb³⁺ codoped NaYF₄.
abstract: Broadband near-infrared luminescence (NIR) from 720 to 950 nm, which is located in the biological window, has been successfully achieved from Nd3+/Yb3+ codoped hexagonal NaYF4 nanoparticles when excited by 980 nm diode laser. Using the fluorescence intensity ratio technique, the temperature sensing behavior of Nd3+ NIR emissions exhibits various advantages over other rare earth ion based nanothermometers. The light-induced thermal loading for the 980 nm excited NaYF4:Nd3+/Yb3+ was also investigated. The results illustrate the multifunctionality of such fluoride nanoparticles, which could simultaneously act as the luminescent nanothermometers and nanoheaters and find potential application in photothermal therapy.
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
authors.forename: Haiyue
authors.initials: H
authors.lastname: Qi
authors.forename: Longjiang
authors.initials: L
authors.lastname: Zheng
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Zhang
authors.forename: Wenwu
authors.initials: W
authors.lastname: Cao