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Simultaneous optical and electrical CO2 detection in one sensitive film.

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Title: Simultaneous optical and electrical CO2 detection in one sensitive film.
Authors: Henfling, M.1,2 Michael.Henfling@emft.fraunhofer.de, Gossner, U.2, Kutter, C.1,2, Hansch, W.2, Trupp, S.1,2
Source: Sensors & Actuators B: Chemical. Mar2017, Vol. 241, p1256-1260. 5p.
Subjects: Gas detectors, Carbon dioxide, Volta effect, Ultraviolet spectroscopy, Optical detectors
Abstract: We are presenting a combination of two measurement methods for simultaneous generation of optical and electrical signals out of one gasochromic film. For this purpose we combined the UV–vis spectroscopy with the contact potential difference (CPD) measurement. To demonstrate the advantages of this combined measurement we chose a well-known gasochromic system. For testing the benefits and limitations of the concept, we used a phenol red based film with known sensitivity to CO 2 . Getting in contact with CO 2 the phenol red based sensitive layer shows changes in absorption spectra and in contact potential difference (CPD). Due to the combination of both measurement techniques the influence of temperature and humidity, which is always a challenge in gas detection, can be identified and eliminated. We see different signal behaviour of the two measurement methods at humidity and temperature changes. In dry conditions the optical signal response towards CO 2 is reduced, whereas the electrical signal is increased. Whereas the optical signal response is strongly dependent on the temperature, the electrical signal seems to be independent. These reactions look promising for future gas sensor applications in the field of gasochromic sensor dye evaluation. [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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Header DbId: egs
DbLabel: Engineering Source
An: 120406175
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Simultaneous optical and electrical CO2 detection in one sensitive film.
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  Data: <searchLink fieldCode="AR" term="%22Henfling%2C+M%2E%22">Henfling, M.</searchLink><relatesTo>1,2</relatesTo><i> Michael.Henfling@emft.fraunhofer.de</i><br /><searchLink fieldCode="AR" term="%22Gossner%2C+U%2E%22">Gossner, U.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kutter%2C+C%2E%22">Kutter, C.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hansch%2C+W%2E%22">Hansch, W.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Trupp%2C+S%2E%22">Trupp, S.</searchLink><relatesTo>1,2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Sensors+%26+Actuators+B%3A+Chemical%22">Sensors & Actuators B: Chemical</searchLink>. Mar2017, Vol. 241, p1256-1260. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Gas+detectors%22">Gas detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+dioxide%22">Carbon dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Volta+effect%22">Volta effect</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet+spectroscopy%22">Ultraviolet spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+detectors%22">Optical detectors</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: We are presenting a combination of two measurement methods for simultaneous generation of optical and electrical signals out of one gasochromic film. For this purpose we combined the UV–vis spectroscopy with the contact potential difference (CPD) measurement. To demonstrate the advantages of this combined measurement we chose a well-known gasochromic system. For testing the benefits and limitations of the concept, we used a phenol red based film with known sensitivity to CO 2 . Getting in contact with CO 2 the phenol red based sensitive layer shows changes in absorption spectra and in contact potential difference (CPD). Due to the combination of both measurement techniques the influence of temperature and humidity, which is always a challenge in gas detection, can be identified and eliminated. We see different signal behaviour of the two measurement methods at humidity and temperature changes. In dry conditions the optical signal response towards CO 2 is reduced, whereas the electrical signal is increased. Whereas the optical signal response is strongly dependent on the temperature, the electrical signal seems to be independent. These reactions look promising for future gas sensor applications in the field of gasochromic sensor dye evaluation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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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.2016.10.004
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        Text: English
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        Type: general
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      – SubjectFull: Volta effect
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      – SubjectFull: Ultraviolet spectroscopy
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      – SubjectFull: Optical detectors
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      – TitleFull: Simultaneous optical and electrical CO2 detection in one sensitive film.
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              Text: Mar2017
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