How small are Donaldson’s nanofibers?
The typical fiber diameter is 200 – 500 times smaller than a human hair. A scanning electron microscope (SEM) is needed to see an individual fiber. The photomicrographs on this web-site were taken with Donaldson’s SEM. Unlike other sub-micron fibers, which are short, Donaldson’s nanofibers are continuous and have an infinite aspect ratio.