UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing

Abstract We demonstrate that UV-light activation of polycrystalline ZnO films on flexible polyimide (Kapton) substrates can be used to detect and differentiate between environmental changes in oxygen and water vapor. The in-plane resistive and impedance properties of ZnO films, fabricated from bacte...

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Autores principales:	Christopher B. Jacobs, Artem B. Maksov, Eric S. Muckley, Liam Collins, Masoud Mahjouri-Samani, Anton Ievlev, Christopher M. Rouleau, Ji-Won Moon, David E. Graham, Bobby G. Sumpter, Ilia N. Ivanov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ee6d9d897cfb4fa4b11c5a8391efef04
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spelling	oai:doaj.org-article:ee6d9d897cfb4fa4b11c5a8391efef042021-12-02T15:05:26ZUV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing10.1038/s41598-017-05265-52045-2322https://doaj.org/article/ee6d9d897cfb4fa4b11c5a8391efef042017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05265-5https://doaj.org/toc/2045-2322Abstract We demonstrate that UV-light activation of polycrystalline ZnO films on flexible polyimide (Kapton) substrates can be used to detect and differentiate between environmental changes in oxygen and water vapor. The in-plane resistive and impedance properties of ZnO films, fabricated from bacteria-derived ZnS nanoparticles, exhibit unique resistive and capacitive responses to changes in O2 and H2O. We propose that the distinctive responses to O2 and H2O adsorption on ZnO could be utilized to statistically discriminate between the two analytes. Molecular dynamic simulations (MD) of O2 and H2O adsorption energy on ZnO surfaces were performed using the large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) with a reactive force-field (ReaxFF). These simulations suggest that the adsorption mechanisms differ for O2 and H2O adsorption on ZnO, and are governed by the surface termination and the extent of surface hydroxylation. Electrical response measurements, using DC resistance, AC impedance spectroscopy, and Kelvin Probe Force Microscopy (KPFM), demonstrate differences in response to O2 and H2O, confirming that different adsorption mechanisms are involved. Statistical and machine learning approaches were applied to demonstrate that by integrating the electrical and kinetic responses the flexible ZnO sensor can be used for detection and discrimination between O2 and H2O at low temperature.Christopher B. JacobsArtem B. MaksovEric S. MuckleyLiam CollinsMasoud Mahjouri-SamaniAnton IevlevChristopher M. RouleauJi-Won MoonDavid E. GrahamBobby G. SumpterIlia N. IvanovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christopher B. Jacobs Artem B. Maksov Eric S. Muckley Liam Collins Masoud Mahjouri-Samani Anton Ievlev Christopher M. Rouleau Ji-Won Moon David E. Graham Bobby G. Sumpter Ilia N. Ivanov UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing
description	Abstract We demonstrate that UV-light activation of polycrystalline ZnO films on flexible polyimide (Kapton) substrates can be used to detect and differentiate between environmental changes in oxygen and water vapor. The in-plane resistive and impedance properties of ZnO films, fabricated from bacteria-derived ZnS nanoparticles, exhibit unique resistive and capacitive responses to changes in O2 and H2O. We propose that the distinctive responses to O2 and H2O adsorption on ZnO could be utilized to statistically discriminate between the two analytes. Molecular dynamic simulations (MD) of O2 and H2O adsorption energy on ZnO surfaces were performed using the large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) with a reactive force-field (ReaxFF). These simulations suggest that the adsorption mechanisms differ for O2 and H2O adsorption on ZnO, and are governed by the surface termination and the extent of surface hydroxylation. Electrical response measurements, using DC resistance, AC impedance spectroscopy, and Kelvin Probe Force Microscopy (KPFM), demonstrate differences in response to O2 and H2O, confirming that different adsorption mechanisms are involved. Statistical and machine learning approaches were applied to demonstrate that by integrating the electrical and kinetic responses the flexible ZnO sensor can be used for detection and discrimination between O2 and H2O at low temperature.
format	article
author	Christopher B. Jacobs Artem B. Maksov Eric S. Muckley Liam Collins Masoud Mahjouri-Samani Anton Ievlev Christopher M. Rouleau Ji-Won Moon David E. Graham Bobby G. Sumpter Ilia N. Ivanov
author_facet	Christopher B. Jacobs Artem B. Maksov Eric S. Muckley Liam Collins Masoud Mahjouri-Samani Anton Ievlev Christopher M. Rouleau Ji-Won Moon David E. Graham Bobby G. Sumpter Ilia N. Ivanov
author_sort	Christopher B. Jacobs
title	UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing
title_short	UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing
title_full	UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing
title_fullStr	UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing
title_full_unstemmed	UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing
title_sort	uv-activated zno films on a flexible substrate for room temperature o2 and h2o sensing
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/ee6d9d897cfb4fa4b11c5a8391efef04
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UV-activated ZnO films on a flexible substrate for room temperature O2 and H2O sensing

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