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Dissertations / Theses on the topic 'MOX Gas sensor'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Priščák, Juraj. "Charakterizace senzitivních nanomateriálů pro MOX senzory plynů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442521.

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This thesis deals with one-dimensional (1D) and two-dimensional nanomaterials (2D) in terms of their utilization for new types of gas sensors. Thesis focuses on study of sensing elements for gas sensors based on semiconductor metal oxide materials (MOX) and their manufacturing technology. The objective of the thesis is the design and implementation of a sensing elements formed by selected nanomaterials based on the structure of interdigital electrodes. The result of the practical part of the thesis is the characterization and comparison of materials in terms of their detection parameters in th

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2

CICIOTTI, FULVIO. "Oscillator-Based CMOS Readout Interfaces for Gas Sensing Applications." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2019. http://hdl.handle.net/10281/241089.

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Il rilevamento di gas tossici e pericolosi è sempre stato necessario per motivi di sicurezza. Negli ultimi anni, in particolare, l’attenzione per lo sviluppo di sistemi portatili e a basso costo per il rilevamento dei gas è aumentata notevolmente. Questa tesi presenta circuiti CMOS versatili, veloci, ad alta precisione e basso consumo per applicazioni portatili di rilevamento di gas. I sensori target sono i Metal Oxide Semiconductor (MOX). Questi sensori sono ampiamente utilizzati per la loro intrinseca compatibilità con le tecnologie MEMS integrate. Le tipologie di lettura scelte sono basate

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3

KRIK, Soufiane. "Low-operating temperature chemiresistive gas sensors: Fabrication and DFT calculations." Doctoral thesis, Università degli studi di Ferrara, 2021. http://hdl.handle.net/11392/2488099.

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Despite advantages highlighted by Metal OXides (MOX) based gas sensors, these devices still present drawbacks in their performances (e.g. selectivity, stability and high operating temperature), so further investigations are necessary. Researchers tried to address these problems in several ways, which includes new synthesis methods for innovative materials based on MOX, such as solid solutions, addition of catalysts and doping of MOX by using external atoms or oxygen vacancies. Concerning this last issue, literature presents a lack of studies on how the arrangement and number of oxygen vacancie

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4

Malaver, Rojas Jairo Alexander. "Development of gas sensing technology for ground and airborne applications powered by solar energy : methodology and experimental results." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/74644/1/74644.pdf.

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Monitoring gases for environmental, industrial and agricultural fields is a demanding task that requires long periods of observation, large quantity of sensors, data management, high temporal and spatial resolution, long term stability, recalibration procedures, computational resources, and energy availability. Wireless Sensor Networks (WSNs) and Unmanned Aerial Vehicles (UAVs) are currently representing the best alternative to monitor large, remote, and difficult access areas, as these technologies have the possibility of carrying specialised gas sensing systems, and offer the possibility

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5

Alolaywi, Haidar. "Electrochemical MoOx/Carbon Nanocomposite Gas Sensor for Formaldehyde Detection at Room Temperature." University of Toledo / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1596821142716346.

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6

Magalhães, Filipe Bento. "Capacitor MOS aplicado em sensor de imagem química." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-06072014-230841/.

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O desenvolvimento de sensores em sistemas para controle ambiental tem-se mostrado uma área de elevado interesse científico e técnico. Os principais desafios nesta área estão relacionados ao desenvolvimento de sensores com capacidade de detecção de várias substâncias. Neste contexto, os capacitores MOS apresentam-se como dispositivos versáteis para a geração de imagens químicas com potencial de detecção e classificação de diferentes substâncias a partir de apenas um único sensor. No presente trabalho, foi proposto um sensor MOS com um perfil geométrico de porta em forma de cata-vento composta p

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7

Moghe, Ameya S. "Synthesis and Gas Sensing Properties of MOD Ni-Zr02 Cermet Films on Silicon Substrate." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1131983774.

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8

Nickerl, Georg, Irena Senkoska, and Stefan Kaskel. "Tetrazine functionalized zirconium MOF as an optical sensor for oxidizing gases." Royal Society of Chemistry, 2015. https://tud.qucosa.de/id/qucosa%3A36053.

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Dihydro-1,2,4,5-tetrazine-3,6-dicarboxylate was introduced into the chemically stable UiO-66 structure by a postsynthetic linker exchange reaction to create an optical sensor material for the detection of oxidative agents such as nitrous gases. The incorporated tetrazine unit can be reversibly oxidized and reduced, which is accompanied by a drastic colour change from yellow to pink and vice versa. The high stability of the framework during redox reaction was proven by powder X-ray diffraction and nitrogen physisorption measurements.

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9

Kristiansen, Pontus, and Roman Postnikov. "Tillståndsövervakning av rullningslager med hjälp av E-näsa." Thesis, Luleå tekniska universitet, Drift, underhåll och akustik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71064.

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I dagsläget finns det ingen standardiserad metod för att mäta en enhets tillstånd medhjälp av dofter. Vid tillståndsövervakning av rullningslager är vibrationsmätning denmest dominanta metoden. I samband med vibrationsmätning används i vissa falltemperaturövervakning för att få en bättre insikt på rullningslagrets tillstånd. I det härarbetet undersöks de om en elektronisk näsa kan avgöra ett rullningslagers tillstånd.Innan några mätningar påbörjas monterades en elektronisk näsa ihop i ett hölje sombestår av ett kretskort, metalloxid-sensorer och en fläkt för att styra dofter med ettkonstant fl

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10

Perrot, Virginie. "Méthode innovante de croissance de couches minces de MOF par CVD pour la détection de gaz." Thesis, Lyon, 2021. http://www.theses.fr/2021LYSE1331.

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La mesure sur site et en temps réel des concentrations de gaz est cruciale pour la compréhension et la surveillance des processus industriels et environnementaux. Ces dernières années, il devient de plus en plus nécessaire de développer des outils d'analyse multigaz portatifs permettant la détection in situ de mélanges gazeux complexes, principalement pour des raisons de sécurité, de processus et d'environnement. Une approche prometteuse est basée sur l'intégration de différentes parties de systèmes analytiques de détection (par exemple pré-concentrateur, colonne de chromatographie en phase ga

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11

Heitz, Jérôme. "Etude, modélisation et conception d'un multicapteur chimique à base de CNTFET." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAD031/document.

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Depuis quelques années, les explosifs artisanaux à base de peroxyde sont fréquemment utilisés dans les actes de terrorisme. Leur simplicité de conception ne les rend pas moins inoffensifs car ils sont tout aussi puissants que ceux à base de TNT (trinitrotoluène). Au regard des enjeux majeurs de la sécurité globale et en particulier de la protection du citoyen, il devient nécessaire de bénéficier d'instruments de détection fiables. C'est dans ce cadre que s'inscrit ce travail de thèse qui vise à développer un capteur intégré, sensible et sélectif aux traces d'explosifs, notamment ceux à base de

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12

Hetznecker, Alexander. "Untersuchung der gassensitiven Eigenschaften von SnO2/NASICON-Kompositen." Doctoral thesis, [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975219723.

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13

Jhang, Jyun-Hao, and 張均豪. "Preparation of ZnO nanostructure for MOS gas sensor by sol-gel method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/qus43r.

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14

Li, Chia-Yu, and 李佳諭. "Preparation of inkjet printed flexible MOF-derived porous ZnO/CuO gas sensor with low operating temperature." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/kbe2mh.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系博碩士班<br>106<br>In this study, inkjet printing technology was used to prepare a looped electrode composed of silver nanoparticles on a flexible polyimide (PI) film, and a porous semiconductor-type gas-sensing material such as zinc oxide and copper oxide, which were derived from a metal-organic framework material was used as sensing layer, and coated onto nanosilver loop type electrode. To investigate the sensing capability of the homemade gas sensor under reducing gas atmosphere at room temperature with a low wattage UV-LED (10 W) lamp irradiated, to improve the se

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15

Hsin-HouLu and 呂鑫豪. "Fabrication of Metal-Semiconductor (MS) and Metal-Oxide-Semiconductor (MOS) Type Hydrogen Sensors Based on GaN/AlGaN Heterostructures." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/a6m6z7.

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碩士<br>國立成功大學<br>微電子工程研究所<br>105<br>In this thesis, a series of GaN/AlGaN Schottky diode based hydrogen sensors have been fabricated and studied. Pd was chosen as Schottky contacts metal to detect hydrogen gas. Hydrogen sensing behaviors of the studied devices are investigated by sensing response and response time under different gas concentrations, and we compare the gas sensing properties of devices with and without H2O2 treatment. First, Pd/HfO2/GaN/AlGaN Schottky diode-type hydrogen sensor is fabricated and studied. Using RF sputtering to deposite HfO2 between Pd and GaN. HfO2 layer can dec

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16

Jana, Ajay Kumar. "Metal-Organic Framework (MOF) Compounds : Synthesis, Structure, Sensing and Catalytic Studies." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/3774.

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The metal-organic framework (MOF) compounds have witnessed rapid growth in the past decade and currently emerged as a highly unique area in the field of chemistry, materials science, and multiple branches of engineering. It presents applications in diverse fields such as gas sorption, catalysis, ionic conductivity, sensing etc. These compounds are built by the inorganic metal ions which are bridged by organic linkers to form extended structures. These compounds are mainly synthesized by either one-pot synthesis or in a sequential manner. In the former case, the inorganic metal ions and the res

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17

Jana, Ajay Kumar. "Metal-Organic Framework (MOF) Compounds : Synthesis, Structure, Sensing and Catalytic Studies." Thesis, 2017. http://etd.iisc.ernet.in/2005/3774.

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The metal-organic framework (MOF) compounds have witnessed rapid growth in the past decade and currently emerged as a highly unique area in the field of chemistry, materials science, and multiple branches of engineering. It presents applications in diverse fields such as gas sorption, catalysis, ionic conductivity, sensing etc. These compounds are built by the inorganic metal ions which are bridged by organic linkers to form extended structures. These compounds are mainly synthesized by either one-pot synthesis or in a sequential manner. In the former case, the inorganic metal ions and the res

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