Figure 1

Spike parameters in the time domain: an amperometric spike is characterized by the Pre-Spike Foot (PSF), rising phase, spike and the falling phase. Here \(I_\textrm{max}\) is the peak current, \(t_\textrm{rise}\) is the rise time (from \(25\%\) to \(75\%\) of \(I_\textrm{max}\)), \(t_\frac{1}{2}\) is the half peak width, \(I_\textrm{foot}\) is the PSF current, \(t_\textrm{foot}\) is the PSF duration, \(Q_\textrm{spike}\) is the charge of the spike and \(Q_\textrm{foot}\) is the charge of the PSF.