Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Voltage required to maintain an electrospray current of 75 nA at 100 nL∕min as a function of distance between emitter and counterelectrode. Distance and voltage values normalized with critical radius r* and critical voltage [γr*∕ε0]1∕2, respectively.
