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Dynamic analysis of the extended space charge layer using chronopotentiometric measurements

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Authors
Cho, Inhee; Lee, Hyomin; Kim, Sung Jae
Issue Date
2020-06-05
Publisher
Springer Open
Citation
Micro and Nano Systems Letters. 2020 Jun 05;8(1):10
Keywords
Ion concentration polarizationChronopotentiometric measurementExtended space charge layer
Abstract
In this paper, we experimentally verified the length (LESC) and the concentration (cESC) of the extended space charge (ESC) layer in front of the electrical double layer (EDL) using the chronopotentiometric measurement and the equivalent circuit model analysis. From the experimentation, the coupled-response of the EDL and the ESC layer was discriminated from the contribution of electro-osmotic flow (EOF). In addition, we derived the potential differences across the ESC (VESC) layer using the circuit model of the ICP layer under rigorous consideration of ESC and EDL. As a result, we obtained that VESC was linearly proportional to the square of the applied current (iapplied). Hence, LESC and cESC were quantitatively provided, where LESC is linear to the iapplied and cESC is constant regardless of iapplied. Thus, this experimentation could not only clarify an essential ICP theory but also guide in ESC-based applications.
ISSN
2213-9621
Language
English
URI
https://doi.org/10.1186/s40486-020-00112-1

http://hdl.handle.net/10371/168551
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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