Publication detail

The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations

SEDLÁK, P. KUBERSKÝ, P.

Original Title

The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations

English Title

The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations

Type

journal article in Web of Science

Language

en

Original Abstract

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.

English abstract

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.

Keywords

analyte flow; current fluctuations; amperometric sensor; signal-to-noise ratio

Released

14.02.2020

Publisher

MDPI

Location

ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND

ISBN

1424-8220

Periodical

SENSORS

Year of study

20

Number

4

State

CH

Pages from

1

Pages to

17

Pages count

17

URL

Full text in the Digital Library

Documents

BibTex


@article{BUT162256,
  author="Petr {Sedlák} and Petr {Kuberský}",
  title="The Effect of the Orientation Towards Analyte Flow on Electrochemical Sensor Performance and Current Fluctuations",
  annote="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.",
  address="MDPI",
  chapter="162256",
  doi="10.3390/s20041038",
  howpublished="online",
  institution="MDPI",
  number="4",
  volume="20",
  year="2020",
  month="february",
  pages="1--17",
  publisher="MDPI",
  type="journal article in Web of Science"
}