An official website of the United States government
Here's how you know
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.
(a) Dark Field STEM image shows in vivo breakdown of SiO2-MNPs in alveolar macrophage (Zone I) and formation of Zone II. (b) Magnified region shows small nanoparticles in Zone II