Fig. 5
From: Role of outer surface probes for regulating ion gating of nanochannels
Revealing ion-gating efficiency through probes density calculation. a Schematic showing IT (dashed gray arrow) and ET (dashed blue arrow) through DNA SS–RuHex system. CP capture probe; CS1 complementary strand 1; and CS2 complementary strand 2 (also see Supplementary Fig. 2). b, c Dynamic response to ATP of regionally assembled DNA SS–RuHex system using differential pulse voltammetry (DPV, b) and chronocoulometry (CC, c) measurements. d, e Chronocoulometry response curves of thiolated CP + MCH monolayers with (solid line) and without (dashed line) RuHex ions adsorption at the inner wall (d) and outer surface (e) of nanochannels, respectively. Here, Qad and Qdl represent the charge from electrochemical reduction of the adsorbed RuHex ions and the capacitive charge, respectively. f Comparison of DNA probe assembly density, regionally functional area, and probe molecule amount at different domains of the nanochannels. Error bars represent standard deviations of independent triple experiments
