Extended Data Figure 3: Characterization of CNT porins.
From: Stochastic transport through carbon nanotubes in lipid bilayers and live cell membranes

a, Histogram of the diameters of short CNT fragments measured with AFM. Most CNT porins show diameters between 1 and 2 nm. Inset, high-magnification AFM image of a single CNT on a bare mica surface. b, Histogram of the diameters of CNT porins inserted into the lipid vesicles measured by cryo-TEM. c, Raman spectrum of the short-CNT/lipid complex after 16 h of sonication-assisted cutting. Inset, magnified view of the radial breathing mode region of the CNT spectrum (100–300 cm−1).