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Fluctuation enhanced gas sensing with WO3-based nanoparticle gas sensors modulated by UV light at selected wavelengths.

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Title: Fluctuation enhanced gas sensing with WO3-based nanoparticle gas sensors modulated by UV light at selected wavelengths.
Authors: Trawka, Maciej1, Smulko, Janusz1 jsmulko@eti.pg.gda.pl, Hasse, Lech1, Granqvist, Claes-Göran2, Annanouch, Fatima Ezahra3, Ionescu, Radu3
Source: Sensors & Actuators B: Chemical. Oct2016, Vol. 234, p453-461. 9p.
Subjects: Gas detectors, Tungsten trioxide, Metal nanoparticles, Ultraviolet radiation, Wavelengths, Fluctuations (Physics)
Abstract: The sensitivity and selectivity of WO 3 -based gas sensors can be enhanced by UV-irradiation-induced modulation, especially if different wavelengths are employed. We used fluctuation-enhanced gas sensing, based on measurements of resistance fluctuations in the gas sensor, to study the effects of such modulation on the noise intensity for ambient atmospheres of synthetic air without and with additions of small amounts of ethanol, methane and formaldehyde. Our data confirmed that the method is energy efficient and can be applied to improve gas detection sensitivity and selectivity. The results are strongly dependent on the gaseous species, and a single UV-modulated WO 3 -based gas sensor discriminate between different gases. [ABSTRACT FROM AUTHOR]
Copyright of Sensors & Actuators B: Chemical is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 116405005
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Fluctuation enhanced gas sensing with WO3-based nanoparticle gas sensors modulated by UV light at selected wavelengths.
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  Data: <searchLink fieldCode="AR" term="%22Trawka%2C+Maciej%22">Trawka, Maciej</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Smulko%2C+Janusz%22">Smulko, Janusz</searchLink><relatesTo>1</relatesTo><i> jsmulko@eti.pg.gda.pl</i><br /><searchLink fieldCode="AR" term="%22Hasse%2C+Lech%22">Hasse, Lech</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Granqvist%2C+Claes-Göran%22">Granqvist, Claes-Göran</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Annanouch%2C+Fatima+Ezahra%22">Annanouch, Fatima Ezahra</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Ionescu%2C+Radu%22">Ionescu, Radu</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Sensors+%26+Actuators+B%3A+Chemical%22">Sensors & Actuators B: Chemical</searchLink>. Oct2016, Vol. 234, p453-461. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Gas+detectors%22">Gas detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Tungsten+trioxide%22">Tungsten trioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+nanoparticles%22">Metal nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet+radiation%22">Ultraviolet radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Wavelengths%22">Wavelengths</searchLink><br /><searchLink fieldCode="DE" term="%22Fluctuations+%28Physics%29%22">Fluctuations (Physics)</searchLink>
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  Data: The sensitivity and selectivity of WO 3 -based gas sensors can be enhanced by UV-irradiation-induced modulation, especially if different wavelengths are employed. We used fluctuation-enhanced gas sensing, based on measurements of resistance fluctuations in the gas sensor, to study the effects of such modulation on the noise intensity for ambient atmospheres of synthetic air without and with additions of small amounts of ethanol, methane and formaldehyde. Our data confirmed that the method is energy efficient and can be applied to improve gas detection sensitivity and selectivity. The results are strongly dependent on the gaseous species, and a single UV-modulated WO 3 -based gas sensor discriminate between different gases. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Sensors & Actuators B: Chemical is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.snb.2016.05.032
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      – Code: eng
        Text: English
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        Type: general
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      – SubjectFull: Metal nanoparticles
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              Text: Oct2016
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