Enhanced sensing performance of the amperometric gas sensor by laser-patterning of the polymer membrane electrode

Measurement Uncertainty Estimation in Amperometric Sensors: A Tutorial Review

“…The limiting current is proportional to the electrochemically active surface area, i.e. , the three-phase boundary (TPB: interface between the gas, the electrode and the electrolyte) area, because the electrochemical reaction takes place only in this area [ 22 ]. Nanostructures can dramatically increase the three-phase boundary area, followed by an enhancement of the sensors sensitivity [ 5 ].…”

“…Because of the nature of amperometric measurement described in the previous section it is clear that it is affected by numerous uncertainty sources. In the literature there is no shortage of reports that describe amperometric sensors of different design and address their characteristics, such as response time, detection limit, linearity, repeatability and sensitivity of sensors [ 14 , 16 , 22 , 33 – 43 ]. There are also works that discuss accuracy [ 38 , 44 ] and drift [ 34 , 36 , 37 ].…”

“…In the literature many repeatability estimates for different sensors can be found [ 16 , 22 , 33 – 37 ]. Sensitivity of the sensor is closely related to repeatability.…”

“…It is a parameter describing dynamic properties of the sensor with respect to changes of the analyte concentration [ 14 ]. Response time of amperometric sensors has been investigated extensively both experimentally [ 16 , 22 , 35 , 36 , 38 , 41 – 43 , 59 , 72 ] and via theoretical simulations [ 32 , 73 ].…”

“…Under these conditions zero current is the stationary current of the sensor. In the literature only few authors have addressed zero current [ 22 , 31 , 36 ].…”