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about impedance of microdisk electrode

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I want to calculate impedance of microelectrode.
In this paper impedance is calculated by COMSOL.

[ C. Gabrielli, M. Keddam, V. Vivier, J.Phys.Chem. B, 110, 20478-20485 (2006)]


Could anyone tell me how to calculate this impedance by COMSOL.


6 Replies Last Post Dec 27, 2010, 8:52 p.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago Dec 24, 2010, 4:49 a.m. EST
Hi

in which version ? in anycase check the doc (do an indexed search) and use the lumped ports, the work is then mostly done by COMSOL

--
Good luck
Ivar
Hi in which version ? in anycase check the doc (do an indexed search) and use the lumped ports, the work is then mostly done by COMSOL -- Good luck Ivar

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Posted: 1 decade ago Dec 24, 2010, 9:37 a.m. EST
Hello. Mr. Ivar

I use COMSOL ver.4.0 to simulate microelectrode's impedance.


I am Japanese,so I am poor at English.
Could you tell me the meaning of [anycae] and[lumped ports] in easy expression?


Shoui Kawakita
Hello. Mr. Ivar I use COMSOL ver.4.0 to simulate microelectrode's impedance. I am Japanese,so I am poor at English. Could you tell me the meaning of [anycae] and[lumped ports] in easy expression? Shoui Kawakita

Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago Dec 24, 2010, 12:17 p.m. EST
Hi

sorry I was typing too quickly I have corrected the typo.

If you are using 4.0, then find out how to get 4.1 and update it with latest patch (main web site "updates") as there are several errors or complications in it's use This is much easier in 4.1 and the doc is also better
--
Good luck
Ivar
Hi sorry I was typing too quickly I have corrected the typo. If you are using 4.0, then find out how to get 4.1 and update it with latest patch (main web site "updates") as there are several errors or complications in it's use This is much easier in 4.1 and the doc is also better -- Good luck Ivar

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Posted: 1 decade ago Dec 26, 2010, 8:27 p.m. EST
Dear Mr. Ivar.


Thank you for your reply. So you mean it is difficult to simulate diffusion impedance of microelectrode?

In Version4.0, I found [Surface integration]comand in Derived Values Comand. I think it comand can display the flux on the electrode surface. Use this value I thnk I can calculate impedance use fourier expression.

How do you think this plan?
Dear Mr. Ivar. Thank you for your reply. So you mean it is difficult to simulate diffusion impedance of microelectrode? In Version4.0, I found [Surface integration]comand in Derived Values Comand. I think it comand can display the flux on the electrode surface. Use this value I thnk I can calculate impedance use fourier expression. How do you think this plan?

Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago Dec 27, 2010, 2:23 a.m. EST
Hi

I do not say it's difficult, it is just that depending on how you set up the model, you must either write out the formulas, and the integrations, yourself fully (as you are saying) or often if you can use the lumped "port" BC you have most impedance calculation already prepared.

The best way to learn is do go through several of the examples in the model library:

for that use rather >= v4.1 (far more models available)
1) printout the pdf
2) follow the steps of the pdf,
3) then compare to the model itself already prepared that you also find side-by side with the pdf

--
Good luck
Ivar
Hi I do not say it's difficult, it is just that depending on how you set up the model, you must either write out the formulas, and the integrations, yourself fully (as you are saying) or often if you can use the lumped "port" BC you have most impedance calculation already prepared. The best way to learn is do go through several of the examples in the model library: for that use rather >= v4.1 (far more models available) 1) printout the pdf 2) follow the steps of the pdf, 3) then compare to the model itself already prepared that you also find side-by side with the pdf -- Good luck Ivar

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Posted: 1 decade ago Dec 27, 2010, 8:52 p.m. EST
Thank you Mr. Ivar.

Because the version which we use is ver.4.0,so I'll try to make model myself.

Shoui Kawakita
Thank you Mr. Ivar. Because the version which we use is ver.4.0,so I'll try to make model myself. Shoui Kawakita

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