Figure 2.
Schematic principles of two-color DE-STED. (a) The principle of traditional two-color STED. (b) The principle of two-color DE-STED.
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.