Figure 4.
Simulated electric field distribution along the symmetry axis of the pulled capillary when a 500 V dc potential is applied. The capillary has a tip opening of 2 µm. The x axis labeled as ‘y’ is the distance from the tip opening, with a negative value outside the capillary and a positive value in the capillary. A cell with a diameter of 25 µm is placed 5 µm away from the tip opening at the position of y = −5 µm. Refer to reference 22 for the model set up (the model and boundary conditions are given in Supporting Information). Temperature is set to 298.15 K.