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.
AFM images of silica nanoparticles deposited onto a silicon substrate. Non-touching particles of size class A (top left) and size class B (bottom left) were automatically detected (coloured) and their height measured. Graphical representations of the corresponding number-weighted PSDs are given on the right
