Abstract
A liquid metal field emission gun was operated in a special specimen chamber of a high-voltage transmission electron microscope. The formation of a field-stabilized cone in an electron emission mode was confirmed at the applied voltage of -3.0 kV and the emission current of 300 μA. As the radius of curvature at the apex of a liquid cone was smaller than 10 nm, the emission current density at the cone apex was estimated to be higher than 10 7 A/cm 2.
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