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.)

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