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. 2019 Jan 30;13(1):011301. doi: 10.1063/1.5083913

FIG. 3.

FIG. 3.

The rectification properties of single glass nano pipettes. (a)–(c) Current-voltage curves of a nano pipette recorded in (a) 1 M KCl, (b) 0.1 M KCl, and (c) 10 mM KCl. (d) Scanning electron microscopic image of a glass nano pipette whose transport properties are shown in (e). The narrow opening of this pipette was about 20 nm diameter. (e) The current-voltage curves recorded before and after modifying the nano pipette shown in (d) with poly-l-lysine (PLL) in 25 mM KCl, pH 5.0. Reproduced with permission from Z. S. Siwy and S. Howorka, Chem. Soc. Rev. 39(3), 1115–1132 (2010). Copyright 2010 The Royal Society of Chemistry.