Currently Iam working on amperometric biosensor using SPCE (screen printed carbon electrode) but I still confuse to figure out what is the different between this electrode with Interdigitated array electrode (IDA) since I want to know whether I can work at the same condition between these two.
Thank you.
Hi Tasneem,
A screen-printed electrode (SPE) refers to the way of fabrication, and an IDA electrode refers to the geometry (two interdigitated series). Usually IDAs are fabricated following a thin-film technology (nm-scale layers) and SPEs form thick films (micrometer-scale layers). The main advantage of IDAs is redox cycling, then, the choice will depend on the system.
Hello Tasneem,
When a stencil is being used to print conductive electrode material on a substrate, the sensor is called SPE. When you have a pair of working electrodes very close to each other it is called IDE. Usually, different voltages is applied to these pair to have oxidation on one electrode and reduction on the other one.
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