Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode

Atmospheric photoionization is a widely applied soft ionization mechanism in gas sensing devices for the detection of volatile organic compounds in ambient air. Photoionization is typically induced by low-pressure Vacuum Ultraviolet (VUV) lamps with MgF<sub>2</sub> or LiF lamp surface wi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Adelaide Miranda, Pieter A. A. De Beule
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	photoionization photoionization detector volatile organic compounds gas sensing gas sensor nanolayer thin film Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/31d35343eaf14e8787be21db965ca0c5
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:31d35343eaf14e8787be21db965ca0c5
record_format	dspace
spelling	oai:doaj.org-article:31d35343eaf14e8787be21db965ca0c52021-11-25T18:58:54ZAtmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode10.3390/s212277381424-8220https://doaj.org/article/31d35343eaf14e8787be21db965ca0c52021-11-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/22/7738https://doaj.org/toc/1424-8220Atmospheric photoionization is a widely applied soft ionization mechanism in gas sensing devices for the detection of volatile organic compounds in ambient air. Photoionization is typically induced by low-pressure Vacuum Ultraviolet (VUV) lamps with MgF<sub>2</sub> or LiF lamp surface windows depending on the gas fill and the required wavelength transmission window. These lamps are known to exhibit gradually reduced VUV transmission due to hydrocarbon contamination. LiF surface windows are known to be especially problematic due to their hygroscopic nature, reducing VUV lamp lifetime to a mere 100 h, approximately. Here, we present a new design for the electrode of a photoionization detector based on thin-film technology. By replacing the commonplace metal grid electrode’s VUV lamp surface window with a chromium/gold thin film we obtain a doubling of photon efficiency for photoionization. Replacing the hygroscopic LiF lamp window surface with a metallic layer additionally offers the possibility to vastly increase operational lifetime of low-pressure Argon VUV lamps.Adelaide MirandaPieter A. A. De BeuleMDPI AGarticlephotoionizationphotoionization detectorvolatile organic compoundsgas sensinggas sensornanolayer thin filmChemical technologyTP1-1185ENSensors, Vol 21, Iss 7738, p 7738 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	photoionization photoionization detector volatile organic compounds gas sensing gas sensor nanolayer thin film Chemical technology TP1-1185
spellingShingle	photoionization photoionization detector volatile organic compounds gas sensing gas sensor nanolayer thin film Chemical technology TP1-1185 Adelaide Miranda Pieter A. A. De Beule Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode
description	Atmospheric photoionization is a widely applied soft ionization mechanism in gas sensing devices for the detection of volatile organic compounds in ambient air. Photoionization is typically induced by low-pressure Vacuum Ultraviolet (VUV) lamps with MgF<sub>2</sub> or LiF lamp surface windows depending on the gas fill and the required wavelength transmission window. These lamps are known to exhibit gradually reduced VUV transmission due to hydrocarbon contamination. LiF surface windows are known to be especially problematic due to their hygroscopic nature, reducing VUV lamp lifetime to a mere 100 h, approximately. Here, we present a new design for the electrode of a photoionization detector based on thin-film technology. By replacing the commonplace metal grid electrode’s VUV lamp surface window with a chromium/gold thin film we obtain a doubling of photon efficiency for photoionization. Replacing the hygroscopic LiF lamp window surface with a metallic layer additionally offers the possibility to vastly increase operational lifetime of low-pressure Argon VUV lamps.
format	article
author	Adelaide Miranda Pieter A. A. De Beule
author_facet	Adelaide Miranda Pieter A. A. De Beule
author_sort	Adelaide Miranda
title	Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode
title_short	Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode
title_full	Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode
title_fullStr	Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode
title_full_unstemmed	Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode
title_sort	atmospheric photoionization detector with improved photon efficiency: a proof of concept for application of a nanolayer thin-film electrode
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/31d35343eaf14e8787be21db965ca0c5
work_keys_str_mv	AT adelaidemiranda atmosphericphotoionizationdetectorwithimprovedphotonefficiencyaproofofconceptforapplicationofananolayerthinfilmelectrode AT pieteraadebeule atmosphericphotoionizationdetectorwithimprovedphotonefficiencyaproofofconceptforapplicationofananolayerthinfilmelectrode
_version_	1718410454733160448

Atmospheric Photoionization Detector with Improved Photon Efficiency: A Proof of Concept for Application of a Nanolayer Thin-Film Electrode

Ejemplares similares