Is it possible that when we have improved the conductivity of the electrode the sensitivity performance does not give significant changes from before optimizing the electrode?
Hi
when you are saying "increase the conductivity" what are you referring to?
- Increase the size? because then the answer is the the signal is proportional to the size of the electrode
- change the the material? if so you are changing the electron transfer properties
Tomer
Hello, Tomer Noyhouzer, I'm referring to the current generated by the modified electrode. For example, when I modified electrode with nanomaterial, the current of modified electrode in ferricyanide is more higher than bare electrode due to the improvement of electron transfer. I just wondering, is it possible when I have improve this "conductivity" modified electrode, the limit of detection (LOD) sensor also enhance.
Ok so this is doing two things at once your are not also changing the electron transfer properties but at the same time your are changing the electrode surface (making it more rough) bot more important is the size to ratio properties of NPs so you will have a dramatic increase in the current and if the NPs are of a different material lets say Au NPs on a ITO electrode your are also changing your Electron transfer kinetics, SO for your question you have a surface modified electrode that can act as a selective electrode towards a specific species.
If you like I wrote a paper on this exact issue in Analytical Chemistry:
http://pubs.acs.org/doi/abs/10.1021/ac401744w
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