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. Author manuscript; available in PMC: 2014 Jan 22.
Published in final edited form as: ACS Nano. 2012 Dec 24;7(1):689–694. doi: 10.1021/nn3050598

Figure 2.

Figure 2

Current vs. voltage for various salt concentrations, C, for a SWCNT device on a glass cover slip (A). The slight asymmetry at the highest salt concentration is probably a consequence of the larger surface charge density in these devices compared to devices made with PMMA barriers. Plotted vs. concentration (B), the conductance changes according to G~Cm where m~0.3. This is a concentration dependence only observed in ion transport through small-diameter SWCNTs. As we have explained in previous reports8–10, it is a consequence of significant electroosmotic flow in a very small frictionless channel.