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. Author manuscript; available in PMC: 2014 Jun 12.
Published in final edited form as: Nano Lett. 2013 Jun 12;13(6):2448–2457. doi: 10.1021/nl400423c

Figure 4.

Figure 4

Numerical simulations of the transmembrane potential drop through a cell membrane (C…C in Figure 3b). In (a), the gap between the NFP and cell membrane is 8 nm for both one- and two-probe NFP systems, and the transmembrane potential drop for both cases is identical despite the fact that the two-probe NFP case has one opened probe (as shown in Figure 3a). This confirms independence of potential drop in each probe. In (b), the transmembrane potential drop, normalized by the input voltage, Vinput, is plotted as a function of gap size (g). (c) Local voltage at the tip (Vtip) as a function of g for a given input voltage, Vinput.