Effect of various flow rate on current fluctuations of amperometric gas sensors
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F19%3A43953384" target="_blank" >RIV/49777513:23220/19:43953384 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26220/19:PU130482
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0925400518321257" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925400518321257</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.snb.2018.12.006" target="_blank" >10.1016/j.snb.2018.12.006</a>
Alternative languages
Result language
angličtina
Original language name
Effect of various flow rate on current fluctuations of amperometric gas sensors
Original language description
The flow rate of analyte is a key parameter in the measurement system that influences response of gas sensors. The paper focuses on possibility of improved gas detection by modulation of analyte flow rate around amperometric sensors at equilibrium conditions by studying the direct current level and its fluctuations at selected concentration. To independently explore an impact of concentration and flow rate on spectral density of current fluctuations, all measurements were provided out under the same temperature, and each sample sensor was put to the same position at the test chamber to be under same fluidic condition. The experiments were carried out on the fully-printed amperometric NO2 sensor based on a semi-planar three electrode topology. The aims of this experimental study are two-fold: firstly, to show that spectral density of current fluctuations significantly changes in the level and the shape as flow rate increases at constant concentration of detected gas; and secondly, to demonstrate that evaluation of these fluctuations and DC component can be used to compensate the negative effect of flow rate on sensor responses. The spectral density of current fluctuations develops as several mechanisms related to fluctuation phenomena become dominant with increasing flow rate. Thus, signal-to-noise ratio of current response on detected gas decreases as flow rate increases, while the ratio is almost invariant to gas concentration.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering
Result continuities
Project
<a href="/en/project/GA18-19104S" target="_blank" >GA18-19104S: Effect of polymer electrolyte crystallinity and carbon electrode morphology on charge transport and its fluctuations in electrochemical gas sensors</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Sensors and Actuators. B, Chemical
ISSN
0925-4005
e-ISSN
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Volume of the periodical
283
Issue of the periodical within the volume
15 March
Country of publishing house
CH - SWITZERLAND
Number of pages
8
Pages from-to
321-328
UT code for WoS article
000455854000040
EID of the result in the Scopus database
2-s2.0-85058367092