PPLYING a strong electrostatic stress to the interface of a conductive or dielectric liquid creates an instability in the surface. If the stress is sufficiently large to balance the counteracting surface tension the liquid forms a conical protrusion called a Taylor cone; if the electrostatic stress is increased to overcome surface tension it will begin to emit a jet and fine aerosol spray (Figure 1). 1 The process of emitting the liquid in this manner is called electrospraying and is used in many applications including electrospray ionization for mass spectrometry, 2-7 electrospinning, 8, 9 particle deposition, 10-12 and colloid thrusters. 13-16