Fig. 5
From: Designable and dynamic single-walled stiff nanotubes assembled from sequence-defined peptoids
Mechanical properties of PNTs. a Height vs. force curves. For all experiments, the same silicon nitride cantilever (k = 0.4 N/m) was used. All force measurements were performed in an AFM fluid cell with deionized water. b A representative force vs. displacement curves. Before tapping the PNTs surface, the deflection voltage was around 0 (horizontal segment). After contacting with PNT’s surface, the deflection voltage increased gradually (slope segment). c, d FEM simulation for indentation of a PNT. The curvature radius of the indenter was set at 5 nm. The length to diameter ratio of the PNT was 10:1. c Before indentation. d After indentation
