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Table 2 Comparison of ionic current rectification factor in K 3 Fe(CN) 6 solution

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

Concentration of K3Fe (CN)6

Rectification factor

(mM)

As-made

Single-step electrooxidation of amine

Electrochemical grafting of diazonium and coupling of dye

Chemical grafting of diazonium and coupling of dye

10

3.9 ± 0.8

14.4 ± 0.6

2.9 ± 0.2

4.0 ± 0.4

50

4.4 ± 0.9

9.8 ± 0.3

2.9 ± 0.2

3.3 ± 0.07

100

3.4 ± 0.1

8.0 ± 0.4

3.2 ± 0.3

3.6 ± 0.2

  1. Rectification factor was calculated by the ratio of ionic transport current at ±0.6-V bias. Linear scan was from −0.60 to + 0.60 V with the scan rate at 50 mV/s.

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