TABLE I:
Electrochemical Data. Some data is reproduced with permission from reference 32. A chart of the approximate area, limit of detection for dopamine, overpotentials, and ratios of peak reductive to peak oxidative currents comparing CFMEs to ACID CNTFMEs, PEI CNTFMEs, PVA-CNTFMEs, and CNTYMEs. The geometric approximations for areas were calculated using the formulas: πr2 + 2πrh for cylinder electrodes and πr2 for disc electrodes with r being the radius of the fiber and h being the length protruding.
| 1 μM DA | n | Approximate Area (μm2) | LOD (nM) | ΔEp (mV) | ip,c/ip,a |
|---|---|---|---|---|---|
| CFME | 4 | 362 π | 24 ± 2 nM | 680 ± 5 | 0.63 ± 0.01 |
| ACID-CNTFME | 6 | 400 π | 3 ± 0.5 nM | 570 ± 7 | 0.95 ± 0.01 |
| PEI-CNTFME | 6 | 156 π | 5 ± 1 nM | 670 ± 6 | 0.78 ± 0.01 |
| PVA-CNTFME | 6 | 156 π | 53 ± 5 nM | 970 ± 3 | 0.72 ± 0.01 |
| CNTYME | 5 | 156 π | 10 ± 0.8 nM | 580 ± 3 | 0.77 ± 0.01 |