Effect of various flow rate on current fluctuations of amperometric gas sensors

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216305:26220/19:PU130482

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of various flow rate on current fluctuations of amperometric gas sensors

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Effect of various flow rate on current fluctuations of amperometric gas sensors

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/GA18-19104S" target="_blank" >GA18-19104S: Vliv krystalinity polymerního elektrolytu a morfologie uhlíkové elektrody na transport náboje a jeho fluktuace v elektrochemických plynových senzorech</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Sensors and Actuators. B, Chemical

ISSN

0925-4005

e-ISSN

—

Svazek periodika

283

Číslo periodika v rámci svazku

15 March

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

321-328

Kód UT WoS článku

000455854000040

EID výsledku v databázi Scopus

2-s2.0-85058367092