This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Nanoparticles Microscope Design . Heart of the orthogonal tracking microscope system developed at NIST is this nanoparticle solution sample well etched in silicon Careful orientation of the silicon crystal makes it possible to chemically etch angled sides in the well so smooth they act as mirrors In this configuration four side views