Abstract:
A photoelectron microscope (photoemission
electron microscope) has been designed and built
for the study of organic and biological samples.
The microscope is an oil-free stainless steel high
vacuum instrument pumped by a titanium sublimation
pump, an ion pump, and molecular sieve roughing
pumps. The electron lenses are of the electrostatic
unipotential type. The microscope is
equipped with a dewar for sample cooling, an
internal cryogenic camera, TV-image intensifier,
and vibration isolation support. Applications
include studies of biological cell surfaces, photosynthetic
membranes and aromatic chemical
carcinogens. A representative micrograph of mouse
3T3 cells is included. In some respects, photoelectron
micrographs resemble scanning electron
micrographs, but the basis for contrast is
different in these two techniques.