Scanning Electron Microscopy (SEM) of PMMA Nanospheres
and Inverse Opal Photonic Crystals
Clicking a thumbnail on this web page (http://chemistry.beloit.edu/edetc/nanolab/photonic4/index.html) shows a movie of that step.
Samples are deposited on conducting graphite tape and gold coated.
The coated samples are placed into an electron microscope.
Zooming in on a sample of monodispersed polymethylmethacrylate spheres.
What is the diameter of the spheres?
Zooming in on a sample of inverse opal photonic silica crystal. What
is the diameter of the holes?
Flying over the surface of a sample of inverse opal photonic crystal
(2000x magnification.)