Therefore, we put this solution aside and in order to solve the problem electrode C2 is chosen as the point of current injection and the base electrode
is chosen to be C8.
Consequently, we fabricated the SPE as described in Section 2 and applied an AChEChOx-modified biosensor as a base electrode
. From the SEM images of the bare SPE (Figure 4(a)), MWNT-modified SPE (Figure 4(b)), COOH-modified SPE (Figure 4(c)), and AChE-ChOx-modified SPE (Figure 4(d)), it can be seen that the surface morphology of the AChE-ChOx-modified SPE demonstrates a polymer-like connection structure partially among the MWNTs because of the loading of bienzymes.
Each CNT row must have a different base electrode
so that a different potential can be applied to it.
The base electrode
was cleaned by giving a dip in 50% nitric acid solution and thorough washing with distilled water ensuring complete removal of any previous deposit on the base, before starting every new electrodeposion.
Attraction of the functionalized magnetic nanoparticles to the probe surface with an external magnet activates the electrical contact between the immobilized proteins and the base electrode
, and the sensor's circuit is switched on.
The activity of lead dioxide is increased with increasing the concentration of cerium ions in the PbO2 deposits but due to enhanced passivity of the base electrode
the activity of the deposit increases.