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.
Representative examples of TEM micrographs of size class A (top left) and a mixture of size class A and class B particles (bottom left), and their corresponding histograms representing the number-weighted density distribution, q 0(x), of area-equivalent circular particle diameters
