electrodynamics, liquid metal ion source, room temperature ionic liquid, nanopatterning, secondary ion mass spectrometry, ion beam lithography, liquid metals and alloys, nanotechnology, CURRENT-DENSITY PROFILES, DIRECT FIELD-EVAPORATION, TEM SAMPLE PREPARATION, CURRENT-VOLTAGE CURVES, LIQUID-METAL SOURCES, DOUBLY-CHARGED IONS, VIRTUAL SOURCE SIZE, MASS-SPECTROMETRY, ELECTRON-EMISSION, TEMPERATURE-DEPENDENCE, Liquid metals and alloys, Ion beam lithography, Nanopatterning, Liquid metal ion source, Electrodynamics, Secondary ion mass spectrometry, Room temperature ionic liquid, Nanotechnology