Figure 1
From: Discriminating single-bacterial shape using low-aspect-ratio pores
Single-bacteria sensing using low thickness-to-diameter aspect-ratio pore channels. (a) Schematic illustration depicting resistive pulse measurements of Escherichia coli and Bacillus subtilis using a SiN micropore of diameter d pore and length L pore. (b) False-colored scanning electron micrographs of E. coli (top) and B. subtilis (bottom). Scale bars denote 2 μm. Dark small circles are holes to filter ionic liquid and fix the bacteria on the substrate. (c,d) The cross-pore ionic current I ion versus time t two dimensional histograms constructed with 200 ionic current spike signals obtained for (c) E. coli and (d) B. subtilis using a SiN pore with d pore = 3.0 μm and L pore = 40 nm. I p and t d denote the pulse height and width, respectively.
