Scientists from the University of Jyväskylä's Nanoscience Center in Finland have introduced a novel, label-free ratiometric ...

Vacuum sealed chamber that contains the field emission gun. A pneumatic valve seals the gun chamber in the event of an accidental vacuum vent. This prevents dust and debris from reaching the tip.

Since the FE-SEM is in effect an electrical circuit, the specimen must be conductive. In the tungsten source SEM, any nonconductive specimen is coated with a very thin layer of conductive material in ...