in electrochemical sensing an analytes we use to detect, sometimes show its own response without using material. after that when working electrode is used the response where the analytes showed is enhanced. so tell how to overcome this problem.
The unmodified sensor is not necessarily unresponsive to the analyte. In fact, it is very common that the unmodified electrode also responds to the analyte, but when the sensor is modified the current is enhanced. This depends on what phenomenon governs the electrochemical response of the modified sensor. If it is a material that responds selectively to the analyte, then it is likely that the unmodified electrode will not respond to the analyte. However, when it is a response due to electrocatalytic effect or increased electroactive area, then it is common for the unmodified electrode to also respond but when the modifying material is used, it significantly improves the response.
In addition, it is important to note that the modified electrode may have a lower detection limit than the unmodified electrode when responding to the analyte, but may also show a wider linear range or better linearity in the analytical response. All this must be taken into account as part of the improvement of the sensor when it is modified.
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