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Low Temperature Gas Sensing with Novel Top-bottom Electrode Configuration

Haidry, Azhar Ali and Ciftyurek, Engin and Saruhan, Bilge (2015) Low Temperature Gas Sensing with Novel Top-bottom Electrode Configuration. Procedia Engineering, 120. Elsevier BV.

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Official URL: http://www.sciencedirect.com/science/article/pii/S1877705815022572

Abstract

Gas sensors based on undoped and Cr doped TiO2 layers with novel top and bottom electrode (TBE) configuration have been employed for NO2 and H2 gas sensing. The sensing layers of about 2 micro-meter thickness were sandwiched between 200 nm thick Pt top and bottom electrodes. These sensors with TBE configuration show promising gas sensing behaviour towards both oxidizing and reducing gases. The crystal structure, microstructure and chemical composition studies of the sensors were performed by X-ray diffraction technique (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), respectively. The comparative structural, morphological and compositional studies enable us to understand the effect of Cr3+ (0.755 Å) substitution within Ti4+ (0.745 Å) lattice on gas sensing properties (24°-200°C). The Cr doped TiO2 sensors were able to detect various concentrations of NO2 at 200 °C and H2 at room temperature. Response/recovery times for 90% change in sensor resistance are in the order of tens of seconds for NO2 at 200 °C and a few minutes for H2 at room temperature.

Item URL in elib:https://elib.dlr.de/98244/
Document Type:Proceedings
Additional Information:referierten
Title:Low Temperature Gas Sensing with Novel Top-bottom Electrode Configuration
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Haidry, Azhar AliAzhar.Haidry (at) dlr.deUNSPECIFIED
Ciftyurek, EnginEngin.Ciftyuerek (at) dlr.deUNSPECIFIED
Saruhan, Bilgebilge.saruhan (at) dlr.deUNSPECIFIED
Date:11 September 2015
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:120
DOI :DOI: 10.1016/j.proeng.2015.08.594
Page Range:pp. 245-248
Publisher:Elsevier BV
Series Name:Procedia Engineering
Status:Published
Keywords:Titanium dioxide, Cr-doping, NO2 sensors; TBE electrode configuration; operating temperature
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > High Temperature and Functional Coatings
Deposited By: Haidry, Azhar Ali
Deposited On:13 Jan 2016 13:15
Last Modified:31 Jul 2019 19:55

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