The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations
Analyte flow influences the performance of every gas sensor; thus, most of these sensors usually contain a diffusion barrier (layer, cover, inlet) that can prevent the negative impact of a sudden change of direction and/or the rate of analyte flow, as well as various unwanted impacts from the surrou...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-02-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/4/1038 |
| _version_ | 1811186432205651968 |
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| author | Petr Sedlák Petr Kuberský |
| author_facet | Petr Sedlák Petr Kuberský |
| author_sort | Petr Sedlák |
| collection | DOAJ |
| description | Analyte flow influences the performance of every gas sensor; thus, most of these sensors usually contain a diffusion barrier (layer, cover, inlet) that can prevent the negative impact of a sudden change of direction and/or the rate of analyte flow, as well as various unwanted impacts from the surrounding environment. However, several measurement techniques use the modulation of the flow rate to enhance sensor properties or to extract more information about the chemical processes that occur on a sensitive layer or a working electrode. The paper deals with the experimental study on how the analyte flow rate and the orientation of the electrochemical sensor towards the analyte flow direction influence sensor performance and current fluctuations. Experiments were carried out on a semi-planar, three-electrode topology that enabled a direct exposure of the working (sensing) electrode to the analyte without any artificial diffusion barrier. The sensor was tested within the flow rate range of 0.1−1 L/min and the orientation of the sensor towards the analyte flow direction was gradually set to the four angles 0°, 45°, 90° and 270° in the middle of the test chamber, while the sensor was also investigated in the standard position at the bottom of the chamber. |
| first_indexed | 2024-04-11T13:46:21Z |
| format | Article |
| id | doaj.art-96a23c7739184057bc5646c76dfcf5e5 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:46:21Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-96a23c7739184057bc5646c76dfcf5e52022-12-22T04:21:05ZengMDPI AGSensors1424-82202020-02-01204103810.3390/s20041038s20041038The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current FluctuationsPetr Sedlák0Petr Kuberský1Faculty of Electrical Engineering and Communications, Brno University of Technology, Technická 10, Brno 616 00, Czech RepublicFaculty of Electrical Engineering, Regional Innovation Centre for Electric Engineering, University of West Bohemia, Univerzitni 8, Plzen 301 00, Czech RepublicAnalyte flow influences the performance of every gas sensor; thus, most of these sensors usually contain a diffusion barrier (layer, cover, inlet) that can prevent the negative impact of a sudden change of direction and/or the rate of analyte flow, as well as various unwanted impacts from the surrounding environment. However, several measurement techniques use the modulation of the flow rate to enhance sensor properties or to extract more information about the chemical processes that occur on a sensitive layer or a working electrode. The paper deals with the experimental study on how the analyte flow rate and the orientation of the electrochemical sensor towards the analyte flow direction influence sensor performance and current fluctuations. Experiments were carried out on a semi-planar, three-electrode topology that enabled a direct exposure of the working (sensing) electrode to the analyte without any artificial diffusion barrier. The sensor was tested within the flow rate range of 0.1−1 L/min and the orientation of the sensor towards the analyte flow direction was gradually set to the four angles 0°, 45°, 90° and 270° in the middle of the test chamber, while the sensor was also investigated in the standard position at the bottom of the chamber.https://www.mdpi.com/1424-8220/20/4/1038analyte flowcurrent fluctuationsamperometric sensorsignal-to-noise ratio |
| spellingShingle | Petr Sedlák Petr Kuberský The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations Sensors analyte flow current fluctuations amperometric sensor signal-to-noise ratio |
| title | The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations |
| title_full | The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations |
| title_fullStr | The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations |
| title_full_unstemmed | The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations |
| title_short | The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations |
| title_sort | effect of the orientation towards analyte flow on electrochemical sensor performance and current fluctuations |
| topic | analyte flow current fluctuations amperometric sensor signal-to-noise ratio |
| url | https://www.mdpi.com/1424-8220/20/4/1038 |
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