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.
Transmission electron micrograph of airborne nanosilica.
A. Silica particles observed in the air while pouring nanosilica into the container.
B. Silica particles in the air while the vacuum cleaner was on (i.e., with suctioning of nanosilica).
C. Energy dispersive X-ray profile (silicone dioxide nanoparticles on carbon-coated copper grid).
