Quantitative fluctuation-enhanced sensing in amperometric NO2 sensors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F15%3A43923214" target="_blank" >RIV/49777513:23220/15:43923214 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/14:39898561 RIV/00216305:26220/15:PU114494

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0301010414002900" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0301010414002900</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemphys.2014.10.021" target="_blank" >10.1016/j.chemphys.2014.10.021</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantitative fluctuation-enhanced sensing in amperometric NO2 sensors

Popis výsledku v původním jazyce

Nitrogen dioxide represents threat to human health even at low concentrations. A new amperometric sensor with three-electrode topology (platinum/solid polymer electrolytes/carbon) was developed to overcome limitations of standard solid NO2 sensors based on inorganic materials. The paper aims to the study of fluctuation phenomena in amperometric sensor and presents preparation technology. The sensor has been exposed to NO2 concentration from 0 to 3 ppm. Experimental results show that thermal noise is only apparent for zero concentration. For higher NO2 concentrations, adsorption-desorption (A-D) noise and diffusion noise become main components of current fluctuations, and the noise spectra exhibit Lorentzian-like shape. The spectral density of current noise at frequency 0.2 Hz depends linearly on NO2 concentration. This linear behavior can be described by adsorption-desorption model for the interaction for two reservoirs. Thus, considering adsorption-desorption noise as a dominant noise source, the noise model is introduced based on Langmuir theory.

Název v anglickém jazyce

Quantitative fluctuation-enhanced sensing in amperometric NO2 sensors

Popis výsledku anglicky

Nitrogen dioxide represents threat to human health even at low concentrations. A new amperometric sensor with three-electrode topology (platinum/solid polymer electrolytes/carbon) was developed to overcome limitations of standard solid NO2 sensors based on inorganic materials. The paper aims to the study of fluctuation phenomena in amperometric sensor and presents preparation technology. The sensor has been exposed to NO2 concentration from 0 to 3 ppm. Experimental results show that thermal noise is only apparent for zero concentration. For higher NO2 concentrations, adsorption-desorption (A-D) noise and diffusion noise become main components of current fluctuations, and the noise spectra exhibit Lorentzian-like shape. The spectral density of current noise at frequency 0.2 Hz depends linearly on NO2 concentration. This linear behavior can be described by adsorption-desorption model for the interaction for two reservoirs. Thus, considering adsorption-desorption noise as a dominant noise source, the noise model is introduced based on Langmuir theory.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Chemical Physics

ISSN

0301-0104

e-ISSN

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Svazek periodika

456

Číslo periodika v rámci svazku

July 2015

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

111-117

Kód UT WoS článku

000356102300019

EID výsledku v databázi Scopus

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