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. 2020 Jun 18;20(12):3453. doi: 10.3390/s20123453

Figure 1.

Figure 1

Sensor architecture. Scheme of the device geometry (a); experimental setup employed for the gate electrode modification (b); processes occurring at the gate electrode, where nitrate reduction induces the increase of OH concentration, resulting in the precipitation of the Layered Double Hydroxide (LDH)/enzyme composite (c).