Figure 5.
Upconversion emission spectra of (a) UDA-capped Yb3+/Er3+-doped NaYF4 NPs and (b) after gel formation (both measured in solid state under identical conditions).
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.