Figure 2.
Fluorescence spectra of two different rare-earth nanoparticles: NaGdF4:Yb/Er (18/2 mol%) and NaYbF4:Er (2 mol%). The spectra were measured under the excitation by a 980-nm diode laser.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.