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Table 3 Summary of ionic rectification factor on DWCNT membrane after water plasma oxidation to remove gatekeepers

From: Single-step electrochemical functionalization of double-walled carbon nanotube (DWCNT) membranes and the demonstration of ionic rectification

Concentration Rectification factor
(mM) Potassium ferricyanide NDS Sodium benzenesulfonate
10 3.2 ± 0.3 1.7 ± 0.2 2.4 ± 0.2
50 2.8 ± 0.3 1.5 ± 0.07 2.0 ± 0.2
100 2.4 ± 0.2 1.4 ± 0.0.02 2.0 ± 0.2