Fig. 2.
Spherical nanoparticle: nanoshell or hollow nanosphere (inner radius r1, outer radius r2 and shell thickness e = r2 – r1)
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.