Modeling of the Electrochemical Motion Sensor Conversion Factor at High Frequencies
The conversion factor of the electrochemical motion sensors at low frequencies is usually quite high. At the same time, it decreases significantly with the increase in frequency. Thus, increasing the conversion factor for high frequencies is essential for practical use. In this work, the theoretical...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/13/2/153 |
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| author | Vadim Agafonov Iuliia Kompaniets Bowen Liu Jian Chen |
| author_facet | Vadim Agafonov Iuliia Kompaniets Bowen Liu Jian Chen |
| author_sort | Vadim Agafonov |
| collection | DOAJ |
| description | The conversion factor of the electrochemical motion sensors at low frequencies is usually quite high. At the same time, it decreases significantly with the increase in frequency. Thus, increasing the conversion factor for high frequencies is essential for practical use. In this work, the theoretical model that allows establishing the basic laws governing the conversion of high-frequency signals in an electrochemical cell has been suggested. The approach was based on the fact that in the case of high frequencies, the diffusion length is less than the distance between the electrodes and the thickness of the channel and it is enough to consider the transformation of the fluid motion into electrical current only near the cathodes. It was found that the signal output current can be represented as the sum of the term which is proportional to the steady-state concentration gradient along the surface on which the cathode is located, and the term proportional to the concentration gradient normal to the surface. Both first and second terms and the total signal current have been calculated for a particular case of a four-electrode planar system. The practical conclusion is that the high frequency conversion factor increases with the interelectrode distance and the channel width decreases compared to the cathode dimension. |
| first_indexed | 2024-03-09T21:25:54Z |
| format | Article |
| id | doaj.art-a99035b16ab54719b2aca5cda5ffcefc |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T21:25:54Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
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| series | Micromachines |
| spelling | doaj.art-a99035b16ab54719b2aca5cda5ffcefc2023-11-23T21:09:26ZengMDPI AGMicromachines2072-666X2022-01-0113215310.3390/mi13020153Modeling of the Electrochemical Motion Sensor Conversion Factor at High FrequenciesVadim Agafonov0Iuliia Kompaniets1Bowen Liu2Jian Chen3Moscow Institute of Physics and Technology, 141701 Dolgoprudny, RussiaMoscow Institute of Physics and Technology, 141701 Dolgoprudny, RussiaState Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, ChinaThe conversion factor of the electrochemical motion sensors at low frequencies is usually quite high. At the same time, it decreases significantly with the increase in frequency. Thus, increasing the conversion factor for high frequencies is essential for practical use. In this work, the theoretical model that allows establishing the basic laws governing the conversion of high-frequency signals in an electrochemical cell has been suggested. The approach was based on the fact that in the case of high frequencies, the diffusion length is less than the distance between the electrodes and the thickness of the channel and it is enough to consider the transformation of the fluid motion into electrical current only near the cathodes. It was found that the signal output current can be represented as the sum of the term which is proportional to the steady-state concentration gradient along the surface on which the cathode is located, and the term proportional to the concentration gradient normal to the surface. Both first and second terms and the total signal current have been calculated for a particular case of a four-electrode planar system. The practical conclusion is that the high frequency conversion factor increases with the interelectrode distance and the channel width decreases compared to the cathode dimension.https://www.mdpi.com/2072-666X/13/2/153electrochemical sensorMET sensormicroelectrodesmicrohydrodynamicsdiffusionelectrolyte |
| spellingShingle | Vadim Agafonov Iuliia Kompaniets Bowen Liu Jian Chen Modeling of the Electrochemical Motion Sensor Conversion Factor at High Frequencies Micromachines electrochemical sensor MET sensor microelectrodes microhydrodynamics diffusion electrolyte |
| title | Modeling of the Electrochemical Motion Sensor Conversion Factor at High Frequencies |
| title_full | Modeling of the Electrochemical Motion Sensor Conversion Factor at High Frequencies |
| title_fullStr | Modeling of the Electrochemical Motion Sensor Conversion Factor at High Frequencies |
| title_full_unstemmed | Modeling of the Electrochemical Motion Sensor Conversion Factor at High Frequencies |
| title_short | Modeling of the Electrochemical Motion Sensor Conversion Factor at High Frequencies |
| title_sort | modeling of the electrochemical motion sensor conversion factor at high frequencies |
| topic | electrochemical sensor MET sensor microelectrodes microhydrodynamics diffusion electrolyte |
| url | https://www.mdpi.com/2072-666X/13/2/153 |
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