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. 2014 Aug 13;86(17):8568–8575. doi: 10.1021/ac5003273

Figure 7.

Figure 7

PEI-CNT fiber microelectrodes maintain antifouling properties in brain slices. (A,B) Serotonin (25 μM) was exogenously applied near a PEI-CNT fiber electrode in a brain slices every 2 min for 10 min. (A) The black trace shows the initial serotonin CV, and the dashed red trace shows the fifth serotonin CV. The CVs are similar. (B) Serotonin current does not significantly change with ejection number (repeated measures one-way ANOVA, p = 0.21, n = 6, error bars SEM). (C,D) Exogenous serotonin was applied, the slice bathed in 10 μM 5-HIAA and serotonin applied again after 30 min, and then the 5-HIAA was washed out and exogenous serotonin applied again. (C) Serotonin CVs before (black trace), after 30 min perfusion of 5-HIAA (red trace), and after 5-HIAA washout (blue trace) are similar. (D) The peak serotonin oxidative current did not significantly change in the presence of 5-HIAA (repeated measures one-way ANOVA, p = 0.46, n = 6, error bars SEM).