Готові списки джерел за темами / TiO2 Thin Film Gas Sensors

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Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "TiO2 Thin Film Gas Sensors"

1

Mohammadi, M. R., Mohammad Ghorbani, and Derek J. Fray. "Influence of Secondary Oxide Phases on Microstructural and Gas Sensitive Properties of Nanostructured Titanium Dioxide Thin Films." Advanced Materials Research 47-50 (June 2008): 41–44. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.41.

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A systematic comparison of single and binary metal oxide TiO2, TiO2-Ga2O3, TiO2-Er2O3 and TiO2-Ta2O5 gas sensors with nanocrystalline and mesoporous microstructure, prepared by solgel route, was conducted. The gas sensitivity was increased by secondary phase introduction into TiO2 film via two mechanisms, firstly through the inhibition of anatase-to-rutile transformation, since the anatase phase accommodates larger amounts of adsorbed oxygen, and secondly through the retardation of grain growth, since the higher surface area provides more active sites for gas molecule adsorption. The binary metal oxides exhibited a remarkable response towards low concentrations of CO and NO2 gases at low operating temperature of 200°C, resulting in increasing thermal stability of sensing films as well as decreasing their power consumption. The calibration curves revealed that all sensors followed the power law ( B gas A S ] [ = ) (where S is sensor response, coefficients A and B are constants and [gas] is gas concentration). The response magnitude of the sensors obtained in this work is superior to TiO2-based sensors reported in previous studies.
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2

Almaev, Aleksei V., Nikita N. Yakovlev, Bogdan O. Kushnarev, Viktor V. Kopyev, Vadim A. Novikov, Mikhail M. Zinoviev, Nikolay N. Yudin, et al. "Gas Sensitivity of IBSD Deposited TiO2 Thin Films." Coatings 12, no. 10 (October 17, 2022): 1565. http://dx.doi.org/10.3390/coatings12101565.

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TiO2 films of 130 nm and 463 nm in thickness were deposited by ion beam sputter deposition (IBSD), followed by annealing at temperatures of 800 °C and 1000 °C. The effect of H2, CO, CO2, NO2, NO, CH4 and O2 on the electrically conductive properties of annealed TiO2 thin films in the operating temperature range of 200–750 °C were studied. The prospects of IBSD deposited TiO2 thin films in the development of high operating temperature and high stability O2 sensors were investigated. TiO2 films with a thickness of 130 nm and annealed at 800 °C demonstrated the highest response to O2, of 7.5 arb.un. when exposed to 40 vol. %. An increase in the annealing temperature of up to 1000 °C at the same film thickness made it possible to reduce the response and recovery by 2 times, due to changes in the microstructure of the film surface. The films demonstrated high sensitivity to H2 and nitrogen oxides at an operating temperature of 600 °C. The possibility of controlling the responses to different gases by varying the conditions of their annealing and thicknesses was shown. A feasible mechanism for the sensory effect in the IBSD TiO2 thin films was proposed and discussed.
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3

Galatsis, K., Y. X. Li, W. Wlodarski, E. Comini, G. Faglia, and G. Sberveglieri. "Semiconductor MoO3–TiO2 thin film gas sensors." Sensors and Actuators B: Chemical 77, no. 1-2 (June 2001): 472–77. http://dx.doi.org/10.1016/s0925-4005(01)00737-7.

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4

Samransuksamer, Benjarong, Mati Horprathum, Pitak Eiamchai, Viyapol Patthanasettakul, Anurat Wisitsoraat, Chanunthorn Chananonnawathorn, Ditsayut Phokharatkul, et al. "Decoration of Gold Nanoparticles on TiO2 Thin Films for Enhanced Response of Ethanol Gas Sensors." Advanced Materials Research 979 (June 2014): 251–54. http://dx.doi.org/10.4028/www.scientific.net/amr.979.251.

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This work investigated the decoration of the gold (Au) nanoparticles (NPs) on the TiO2 thin films for the applications in ethanol gas sensors. The Au-decorated TiO2 thin films (Au-TiO2) were prepared by the DC magnetron sputtering on the silicon (100) wafers and alumina substrates, interdigitated with Au electrodes. The distribution and size of Au nanoparticles were controlled by varying the sputtering time. Morphologies and element composition of the Au-TiO2 films were examined by field-emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDX) respectively. The FE-SEM micrographs when the sputtering time was increased, the average size of the Au NPs was also increased. On the other hand, the distribution of the Au NPs was decreased. The change in size and distribution of the Au NPs consequently improved the response of ethanol gas sensors. The prepared Au-TiO2 was tested, in comparison with TiO2 reference films, as the ethanol sensors at 250-350oC in 50-1,000 ppm gas concentration. The results showed that the TiO2 thin film with Au-decorated at 6 sec sputtering time yielded the highest response of 514 at 350oC operating temperature and 1,000 ppm gas concentration.
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Raza, Muhammad Akram, Anam Habib, Zakia Kanwal, Syed Sajjad Hussain, Muhammad Javaid Iqbal, Murtaza Saleem, Saira Riaz, and Shahzad Naseem. "Optical CO2 Gas Sensing Based on TiO2 Thin Films of Diverse Thickness Decorated with Silver Nanoparticles." Advances in Materials Science and Engineering 2018 (July 19, 2018): 1–12. http://dx.doi.org/10.1155/2018/2780203.

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The fabrication, characterization, and CO2 gas detection performance of single component-based and hetero-nanostructure-based optical gas sensors are reported in the present work. Single component-based structures include (i) TiO2 thin films with varied film thickness (37.45 nm, 51.92 nm, and 99.55 nm) fabricated via the RF sputtering system for different deposition times and (ii) silver nanoparticles (AgNPs) deposited on the glass substrate by the wet chemical method. Hetero-nanostructures were achieved by decorating the AgNPs on the predeposited TiO2 thin films. The structural, morphological, and optical characteristics of prepared samples were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and ellipsometry, respectively. XRD analysis of AgNPs confirmed the crystalline nature of prepared particles with average crystallite size of 21 nm, however, in the case of TiO2 films XRD results suggested amorphous structure of all as-deposited films. size 21 nm. The SEM micrographs confirmed the deposition of AgNPs on the TiO2 thin films. With increasing sputtering time, TiO2 films were found to be denser and more compact, indicating a reduced porosity and higher film thickness. CO2 gas-sensing properties were investigated by measuring the optical transmission spectra in alone air and in CO2 gaseous atmosphere at room temperature. It was observed that neither TiO2 thin films even with higher thickness nor alone AgNPs could demonstrate any substantial gas-sensing activity. Nevertheless, TiO2/AgNP hetero-nanostructured substrates exhibited excellent CO2 gas-sensing performance as indicated by a huge change in the transmission spectra. The enhanced sensing efficiency of TiO2/AgNP nanostructures owing to synergistic effects suggests a promising role of our manufactured sensors in practical applications.
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Vishwakarma, Ankit Kumar, Nitish Kumar Yadav, and Lallan Yadava. "Detection of Toluene Using CdS–TiO2 Thin Film Gas Sensor." Sensor Letters 17, no. 10 (October 1, 2019): 804–6. http://dx.doi.org/10.1166/sl.2019.4149.

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In recent years, significant interest has been shown in the design and development of sensing devices which can be used to identify toxic, combustible gases and organic vapors. The detection of air pollutants such as hydrocarbons, which often has to face in everyday life, is the necessity of mankind. In the present study, undoped and the CdS-doped titanium dioxide (CdS–TiO2) thin film has been fabricated on the glass substrate by the thermal evaporation method using High Hind Vacuum coating unit model number 12 A4D. The several samples of different thickness lie in rang (450 μm to 500 μm) were fabricated. The sensing properties of fabricated CdS-doped TiO2 thin film were examined for toluene gas at room temperature (300 K). The response and recovery time of the sensor were measured varying the concentration of toluene (0–5000 ppm) in air ambient and it is 22 for undoped TiO2 and 38 for CdS–TiO2 thin film. The response and recovery time of the sensors is the 70 s and 125 s for exposed toluene gas at room temperature. We observed that the fabricated CdS–TiO2 thin film is a suitable detector for detection of toluene gas at room temperature.
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Pozos, Heberto Gómez, Karthik Tangirala Venkata Krishna, María de la Luz Olvera Amador, Yuriy Kudriavtsev, and Arturo Maldonado Alvarez. "TiO2 thin film based gas sensors for CO-detection." Journal of Materials Science: Materials in Electronics 29, no. 18 (June 21, 2018): 15829–37. http://dx.doi.org/10.1007/s10854-018-9477-2.

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Khalil, Souad G., and Mahdi M. Mutter. "Synthesis and Characterization of Semiconductor Composites Gas Sensors Based on ZnO Doped TiO2 Thin Films by Laser-Induced Plasma." Key Engineering Materials 900 (September 20, 2021): 112–20. http://dx.doi.org/10.4028/www.scientific.net/kem.900.112.

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This work presents the development of n-type (TiO2) and p-type (ZnO) gas-sensitive materials from ZnO doped TiO2 thin films prepared by pulsed laser deposition technique (PLD) on a glass substrate as a gas sensor of CO2 gas. TiO2 gas-sensing layers have been deposited over a range of ZnO content (0, 20, and 40) wt %. The obtained thin films analysis by atomic force microscopy (AFM), and X-ray diffraction (XRD). Electrical characterization shows that TiO2:ZnO thin films were p-type conductivity and ZnO added was unable to change the composition to the n-type conductivity. There are notable gas-sensing response differences between n-type and p-type ZnO doped TiO2 thin film. The responses toward all tested oxidizing gases tend to increase with operating temperature for the n-type TiO2 films. Besides, the p-type ZnO doping results in a significant response improvement toward tested oxidizing gases such as CO2 gas at the low operating temperature of 60 °C.
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Maziarz, Wojciech. "TiO2/SnO2 and TiO2/CuO thin film nano-heterostructures as gas sensors." Applied Surface Science 480 (June 2019): 361–70. http://dx.doi.org/10.1016/j.apsusc.2019.02.139.

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10

Lo, Tzu-Hsuan, Pen-Yuan Shih, and Chiu-Hsien Wu. "The Response of UV/Blue Light and Ozone Sensing Using Ag-TiO2 Planar Nanocomposite Thin Film." Sensors 19, no. 23 (November 20, 2019): 5061. http://dx.doi.org/10.3390/s19235061.

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We successfully fabricated a planar nanocomposite film that uses a composite of silver nanoparticles and titanium dioxide film (Ag-TiO2) for ultraviolet (UV) and blue light detection and application in ozone gas sensor. Ultraviolet-visible spectra revealed that silver nanoparticles have a strong surface plasmon resonance (SPR) effect. A strong redshift of the plasmonic peak when the silver nanoparticles covered the TiO2 thin film was observed. The value of conductivity change for the Ag-TiO2 composite is 4–8 times greater than that of TiO2 film under UV and blue light irradiation. The Ag-TiO2 nanocomposite film successfully sensed 100 ppb ozone. The gas response of the composite film increased by roughly six and four times under UV and blue light irradiation, respectively. We demonstrated that a Ag-TiO2 composite gas sensor can be used with visible light (blue). The planar composite significantly enhances photo catalysis. The composite films have practical application potential for wearable devices.
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Дисертації з теми "TiO2 Thin Film Gas Sensors"

1

Brown, J. R. "Tin oxide thin film gas sensors deposited by MOCVD." Thesis, Keele University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434038.

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Jin, Yoonsil. "Toxic gas sensors using thin film transistor platform at low temperature." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/46669.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.
Includes bibliographical references (leaves [71-73]).
Semiconducting metal-oxides such as SnO₂, TiO₂, ZnO and WO₃ are commonly used for gas sensing in the form of thin film resistors (TFRs) given their high sensitivity to many vapor species, simple construction and capability for miniaturization. Furthermore, they are generally more stable than polymer-based gas sensors. However, unlike polymers, metal oxide gas sensors must typically be operated between 200-400°C to insure rapid kinetics. Another problem impacting TFR performance and reproducibility is related to poorly understood substrate-semiconductor film interactions. Space charges at this heterojunction are believed to influence chemisorption on the semiconductor-gas interface, but unfortunately, in an unpredictable manner. In this study, the feasibility of employing illumination and the thin film transistor (TFT) platform as a means of reducing operation temperature was investigated on ZnO based TFTs for gas sensors applications. Response to NO₂ is observed at significantly reduced temperature. Photoconductivity measurements, performed as a function of temperature on ZnO based TFRs, indicate that this results in a photon-induced desorption process. Also, transient changes in TFT channel conductance and transistor threshold voltage are obtained with application of gate bias, suggesting that TFTs offer additional control over chemisorption at the semiconductor-gas interface.
by Yoonsil Jin.
S.M.
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3

Rasheed, Raymond Kelvin. "New sensing materials for the detection of malodours." Thesis, University of the West of England, Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308791.

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Kirchner, Patrick [Verfasser], and Michael [Akademischer Betreuer] Keusgen. "Thin-film calorimetric gas sensors for hydrogen peroxide monitoring in aseptic food processes / Patrick Kirchner. Betreuer: Michael Keusgen." Marburg : Philipps-Universität Marburg, 2013. http://d-nb.info/1038786169/34.

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5

Zhang, Jian. "Zeolite Thin Film-Fiber Integrated Optical Sensors for Highly Sensitive Detection of Chemicals in Gas and Liquid Phases." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1195680520.

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6

Abhijith, N. "Semi Conducting Metal Oxide Gas Sensors: Development And Related Instrumentation." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/281.

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A sensor is a technological device or biological organ that detects, or senses, a signal or physical condition and chemical compounds. Technological developments in the recent decades have brought along with it several environmental problems and human safety issues to the fore. In today's world, therefore, sensors, which detect toxic and inflammable chemicals quickly, are necessary. Gas sensors which form a subclass of chemical sensors have found extensive applications in process control industries and environmental monitoring. The present thesis reports the attempt made in development of Zinc oxide thin film based gas sensors. ZnO is sensitive to many gases of interest like hydrocarbons, hydrogen, volatile organic compounds etc. They exhibit high sensitivity, satisfactory stability and rapid response. In the present work the developed sensors have been tested for their sensitivity for a typical volatile organic compound, acetone. An objective analysis of the various substrates namely borosilicate glass, sintered alumina and hard anodized alumina, has been performed as a part of this work. The substrates were evaluated for their electrical insulation and thermal diffusivity. The microstructure of the gas sensitive film on the above mentioned substrates was studied by SEM technique. The gas sensitive Zinc oxide film is deposited by D.C reactive magnetron sputtering technique with substrate bias arrangement. The characterization of the as-deposited film was performed by XRD, SEM and EDAX techniques to determine the variation of microstructure, crystallite size, orientation and chemical composition with substrate bias voltage. The thesis also describes the development of the gas sensor test setup, which has been used to measure the sensing characteristics of the sensor. It was observed that the ZnO sensors developed with higher bias voltages exhibited improved sensitivity to test gas of interest. Gas sensors essentially measure the concentration of gas in its vicinity. In order to determine the distribution of gas concentration in a region, it is necessary to network sensors at remote locations to a host. The host acts as a gateway to the end user to determine the distribution of gas concentration in a region. However, wireless gas sensor networks have not found widespread use because of two inherent limitations: Metal oxide gas sensors suffer from output drift over time; frequent recalibration of a number of sensors is a laborious task. The gas sensors have to be maintained at a high temperature to perform the task of gas sensing. This is power intensive operation and is not well suited for wireless sensor network. This thesis reports an exploratory study carried out on the applicability of gas sensors in wireless gas sensor network. A simple prototype sensing node has been developed using discrete electronic components. A methodology to overcome the problem of frequent calibration of the sensing nodes, to tackle the sensor drift with ageing, is presented. Finally, a preliminary attempt to develop a strategy for using gas sensor network to localize the point of gas leak is given.
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Fisher, Brian. "Surface Acoustic Wave (SAW) Cryogenic Liquid and Hydrogen Gas Sensors." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5208.

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This research was born from NASA Kennedy Space Center's (KSC) need for passive, wireless and individually distinguishable cryogenic liquid and H2 gas sensors in various facilities. The risks of catastrophic accidents, associated with the storage and use of cryogenic fluids may be minimized by constant monitoring. Accidents involving the release of H2 gas or LH2 were responsible for 81% of total accidents in the aerospace industry. These problems may be mitigated by the implementation of a passive (or low-power), wireless, gas detection system, which continuously monitors multiple nodes and reports temperature and H2 gas presence. Passive, wireless, cryogenic liquid level and hydrogen (H2) gas sensors were developed on a platform technology called Orthogonal Frequency Coded (OFC) surface acoustic wave (SAW) radio frequency identification (RFID) tag sensors. The OFC-SAW was shown to be mechanically resistant to failure due to thermal shock from repeated cycles between room to liquid nitrogen temperature. This suggests that these tags are ideal for integration into cryogenic Dewar environments for the purposes of cryogenic liquid level detection. Three OFC-SAW H2 gas sensors were simultaneously wirelessly interrogated while being exposed to various flow rates of H2 gas. Rapid H2 detection was achieved for flow rates as low as 1ccm of a 2% H2, 98% N2 mixture. A novel method and theory to extract the electrical and mechanical properties of a semiconducting and high conductivity thin-film using SAW amplitude and velocity dispersion measurements were also developed. The SAW device was shown to be a useful tool in analysis and characterization of ultrathin and thin films and physical phenomena such as gas adsorption and desorption mechanisms.?
Ph.D.
Doctorate
Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering
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8

Kitenge, Denis. "Optical detection of CO and H2 based on surface plasmon resonance with Ag-YSZ, Au and Ag-Cu nanoparticle films." Scholar Commons, 2009. http://scholarcommons.usf.edu/etd/2047.

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Silver, gold, and copper metallic nanoparticle films have been utilized in various MEMS devices due to not only their electrical but also their optical properties. The focus of this research is to study the detection at room temperature of carbon monoxide (CO) and hydrogen (H2) via Surface Plasmon Resonance (SPR) phenomenon of silver-embedded Yttrium Stabilized Zirconium (Ag-YSZ) nanocomposite film, gold (Au) nanoparticle film, and an alloy film of silver-copper (Ag-Cu) , grown by the Pulsed Laser Deposition (PLD). To determine the appropriate film materials for quick and accurate CO and H2 detection at room temperature with the PLD technique, the growth process was done repeatedly. Optical tools such as X-Ray Diffraction, Alpha Step 200 Profilometer, Atomic Force Microscopy, and Scanning Electron Microscopy were used to characterize thin films. The gas sensing performance was studied by monitoring the SPR band peak behavior via UV/vis spectrophotometer when the films were exposed to CO and H2 and estimating the percent change in wavelength. The metallic nanoparticle films were tested for concentration of CO (100 to 1000 ppm) and H2 (1 to 10%). Silver based sensors were tested for the cross-selectivity of the gases. Overall the sensors have a detection limit of 100 ppm for CO and show a noticeable signal for H2 in the concentration range as low as 1%. The metallic films show stable sensing over a one-hour period at room temperature. The SPR change by UV/vis spectrophotometer shows a significant shift of 623 nm wavelength between 100 ppm CO gas and dry air at room temperature for the alloy films of Ag-Cu with a wider curve as compared to silver and gold films upon their exposure to CO and H2 indicating an improvement in accuracy and quick response. The results indicate that in research of CO and H2 detection at room temperature, optical gas sensors rather than metal oxide sensors are believed to be effective due to not only the absence of chemical involvement in the process but also the sensitivity improvement and accuracy, much needed characteristics of sensors when dealing with such hazardous gases.
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Cavallari, Marco Roberto. "Filmes de poli (3-hexiltiofeno) (P3HT) para transistores de filmes finos orgânicos utilizados como sensores." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-29122014-165104/.

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A importância da pesquisa em eletrônica orgânica, se comparada à microeletrônica convencional baseada principalmente em silício, surge pela presença de inúmeros semicondutores e técnicas de deposição de baixo custo e em grande superfície. Os Transistores de Filmes Finos Orgânicos (OTFTs, do inglês Organic Thin-Film Transistors) são a unidade fundamental em circuitos eletrônicos e, geralmente, apresentam a estrutura de um transistor de efeito de campo. Podem ser fabricados sobre substratos plásticos e oferecem grande número de aplicações como: mostradores, etiquetas de identificação por rádio frequência e eletrônica têxtil. Além disso, há demanda por componentes eletrônicos portáteis e baratos, principalmente como sensores em diagnósticos médicos e veterinários in-situ. A geometria de OTFT mais utilizada em sensores na atualidade é a bottom gate sobre substratos de silício altamente dopado e com óxido de porta inorgânico. Polímeros como poli(3-hexiltiofeno) (P3HT) vêm sendo amplamente utilizados pela comunidade científica, atestando o potencial comercial deste semicondutor em sensores. Neste contexto, esta tese apresenta o desenvolvimento de transistores à base de P3HT como sensores na detecção de analitos em fase vapor. O estudo é composto por uma etapa inicial de caracterização da mobilidade dos portadores de carga por técnicas de transiente de corrente, seguida pela otimização do desempenho de parâmetros elétricos do transistor através de alterações no processamento dos filmes dielétrico e semicondutor. Enfim, conclui-se a investigação através do entendimento dos fatores ligados à degradação do OTFT após exposição à atmosfera e sob estresse elétrico, além do detalhamento da sensibilidade e especificidade do sensor. Sensores de P3HT oferecem enorme potencial de detecção de amônia, cetonas e compostos organoclorados. Outros semicondutores poliméricos são provavelmente necessários para maior especificidade em relação a vapor dágua e álcoois.
Research on organic electronics, compared to conventional silicon-based microelectronics, is necessary as it offers plenty of semiconductors and low-cost deposition techniques that can be performed over wide surfaces. Organic Thin-Film Transistors (OTFTs) are the fundamental unity in electronic circuits and, usually, display the metal insulator semiconductor field-effect transistor (MISFET) structure. OTFTs can be processed over cheap plastic substrates and integrate a high number of applications as: flexible displays, radio frequency identification tags, textile electronics and sensors (e.g. chemical and biological compounds). Nowadays, consumers demand portable and low-cost electronic devices, mainly as sensors for in-situ medical and veterinarian diagnosis. The most widely used OTFT structure in sensing is the bottom-gate/bottom-contact FET over highly-doped silicon substrates and inorganic dielectrics. Polymers as poly(3-hexylthiophene) (P3HT) have found increasing acceptance by the scientific community, attesting their potential as semiconductors for commercial applications. In this context, the thesis lies in the development of organic transistors based in P3HT polymer for the detection of vapor-phase compounds. This study begins with transistor performance optimization through changes in dielectric and semiconductor processing. Thin-film thickness and P3HT cast solution drying time are the main studied parameters. It involves also the understanding of device performance degradation when exposed to atmosphere and under bias stress, before finally mapping sensitivity and specificity against gaseous analytes. P3HT-based sensors are potentially interesting for ammonia, ketones and organochlorides detection. Other polymeric semiconductors may be necessary to increase specificity against water steam and alcohol analytes.
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Raval, Mehul Chandrakant. "Sol-Gel Derived Titania Films And Their Potential Application As Gas Sensor." Thesis, 2008. http://hdl.handle.net/2005/930.

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Today there is a great deal of interest in the development of gas sensors for various applications like monitoring of toxic gases, detection in oil reservoirs, mines, homes etc. Solid-state gas sensors have many advantages over the conventional analytical methods and hence are widely used. Amongst them, semiconducting metal-oxides based sensors are popular due to many advantages like low cost, small size, high sensitivity and long life. The present thesis reports a detailed work of TiO2 (Titania) thin film fabrication based on sol-gel method, study of their crystallization behavior and surface morphology, and characterizing them for alcohol sensing properties Sol-gel method is a wet chemical technique with many advantages over the conventional methods and offers a high degree of versatility to modify the film properties. Titania thin films were made with titanium isopropoxide as the precursor and ethanol and isopropanol as the solvents. Also effect of surfactants(PEG and CTAB) on the sol properties and film properties have experimentally examined. A in-house gas sensor testing setup has been designed and fabricated to characterize the sensors. Sensors with three different electrode configurations and also two different electrode material have been tested. The electrode geometry and material play a significant role on the sensing behavior and results for the same have been discussed.
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Книги з теми "TiO2 Thin Film Gas Sensors"

1

Laconte, J. Micromachined thin-film sensors for SOI-CMOS co-integration. New York: Springer, 2011.

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Micromachined Thin-Film Sensors for SOI-CMOS Co-Integration. Springer, 2006.

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Частини книг з теми "TiO2 Thin Film Gas Sensors"

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Hajjaji, Anouar, Mosbah Amlouk, Mounir Gaidi, Brahim Bessais, and My Ali El Khakani. "Gas Sensors and Photo-Conversion Applications." In Chromium Doped TiO2 Sputtered Thin Films, 57–74. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-13353-9_4.

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Demarne, V., and R. Sanjinés. "Thin Film Semiconducting Metal Oxide Gas Sensors." In Gas Sensors, 89–116. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2737-0_3.

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Sengupta, Amretashis. "Nanocrystalline Thin Film Gas Sensors." In Introduction to Nano, 205–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-47314-6_9.

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4

Kong, L. B., and H. Huang. "Thin Film Gas Sensors Based on Nanocarbon Materials." In Nanoscale Sensors, 189–223. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-02772-2_7.

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5

Sakhuja, Neha, and Navakanta Bhat. "TiO2 Thin Film Optimization for Ammonia Gas Sensing." In Springer Proceedings in Physics, 819–28. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-97604-4_123.

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Weppner, Werner. "Thin Film Solid State Ionic Gas Sensors." In Solid State Microbatteries, 395–405. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2263-2_24.

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Korotcenkov, Ghenadii. "Gas Sensors Based on Thin-Film Transistors." In Integrated Analytical Systems, 415–32. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7165-3_20.

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Schierbaum, K. D., X. Wei-Xing, S. Fischer, and W. Göpel. "Schottky Barriers and Ohmic Contacts with Pt/TiO2(110): Implications to Control Gas Sensor Properties." In Adsorption on Ordered Surfaces of Ionic Solids and Thin Films, 268–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78632-7_24.

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Vallejos, Stella, and Chris Blackman. "II-VI Semiconductor-Based Thin Film Electric and Electronic Gas Sensors." In Handbook of II-VI Semiconductor-Based Sensors and Radiation Detectors, 177–99. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-24000-3_7.

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Berouaken, Malika, Chafiaa Yaddadene, Katia Chebout, Maha Ayat, Hamid Menari, Sabrina Belaid, and Noureddine Gabouze. "CO2 Gas Sensors Based on Hydrophilic Vanadium Oxide Thin Film Coated QCM." In ICREEC 2019, 633–38. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5444-5_79.

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Тези доповідей конференцій з теми "TiO2 Thin Film Gas Sensors"

1

Wisitsoraat, A., E. Comini, G. Sberveglieri, W. Wlodarski, and A. Tuantranont. "Gas-Sensing Characterization of TiO2-ZnO Based Thin Film." In 2006 5th IEEE Conference on Sensors. IEEE, 2006. http://dx.doi.org/10.1109/icsens.2007.355784.

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2

Mills, Steven, Bongmook Lee, and Veena Misra. "Atomic Layer Deposited TiO2 thin films for environmental gas sensing." In 2013 IEEE Sensors. IEEE, 2013. http://dx.doi.org/10.1109/icsens.2013.6688516.

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3

Rydosz, Artur, Adam Czapla, Wojciech Maziarz, Katarzyna Zakrzewska, and Andrzej Brudnik. "CuO and CuO/TiO2-y Thin-Film Gas Sensors of H2 and NO2." In 2018 XV International Scientific Conference on Optoelectronic and Electronic Sensors (COE). IEEE, 2018. http://dx.doi.org/10.1109/coe.2018.8435156.

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4

Zakrzewska, K., P. Nowak, W. Maziarz, A. Rydosz, and K. Kowalski. "P1GS.16 - SnO2/TiO2 thin film n-n heterostructures for H2 and NO2 gas sensing." In 17th International Meeting on Chemical Sensors - IMCS 2018. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2018. http://dx.doi.org/10.5162/imcs2018/p1gs.16.

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5

Wisitsoraat, A., E. Comini, G. Sberveglieri, W. Wlodarski, and A. Tuantranont. "TiO2 Based Nanocrystalline Thin Film Gas Sensors Prepared by Ion-assisted Electron beam Evaporation." In 2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2007. http://dx.doi.org/10.1109/nems.2007.352241.

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Mallick, Shoaib, Zubair Ahmad, and Farid Touati. "Polymer Nanocomposite-based Moisture Sensors for Monitoring of the Water Contents in the Natural Gas Pipelines." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0073.

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Анотація:
In this study, the polymer-based humidity sensors were investigated for humidity sensing applications. The key advantages of polymers that have garnered this attraction are their lightweight, easy preparation, and low cost of both materials and fabrication process. Different techniques are used to enhance the surface morphology and sensitivity of polymeric films, which include synthesis of nanocomposites, copolymerization techniques, and blending of polymers. The incorporation of nanoparticles to the polymer matrix improves the electrical and mechanical properties of the polymeric film. We have investigated different polymer nanocomposites based humidity sensors on enhancing the sensitivity of the sensor, on achieving faster response and recovery time and lower hysteresis loss as compared to the polymeric humidity sensors. In the first phase, we investigated the PLA-TiO2 nanocomposite for humidity sensing applications. We have optimized the concentration of TiO2 in the PLA-TiO2 nanocomposite and apply acetone for the surface treatment of the sensing film. In the second phase, we studied the PVDF-TiO2 nanocomposite-based humidity sensor, achieved a linear response of the sensor, and optimized the concentration of PVDF. In the third phase, we incorporated the BaTiO3 nanoparticles within optimized PVDF and studied the dielectric property of the nanocomposite film. PVDF-BaTiO3 sensors show a smaller hysteresis response. In the 4th phase, we blend the PVDF with SPEEK polymer; the optimized concentration of SPEEK improves the sensitivity of the humidity sensors at a lower humidity level.
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7

Galatsis, Kosmas, Yongxiang Li, Wojtek Wlodarski, Elisabetta Comini, and Giorgio Sberveglieri. "Binary Metal Oxide MoO3-TiO2 and MoO3-WO3 Thin Film Gas Sensors for Environmental Applications." In Proceedings of the International Workshop on New Developments. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812704306_0006.

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8

Izzuddin, Izura, Norhashimah Ramli, Muhamad Mat Salleh, Muhammad Yahaya, and Mohammad Hafizuddin Jumali. "Development of gas sensor system based on the TiO2/Pani composite thin film." In 2008 IEEE International Conference on Semiconductor Electronics (ICSE). IEEE, 2008. http://dx.doi.org/10.1109/smelec.2008.4770336.

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9

Jaaniso, R., A. Gerst, A. Floren, T. Avarmaa, V. Sammelselg, and H. Mandar. "Electrical and Gas Sensing Properties of Cr2O3-TiO2 Thin Films made by Pulsed Laser Deposition." In 2006 5th IEEE Conference on Sensors. IEEE, 2006. http://dx.doi.org/10.1109/icsens.2007.355559.

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Sarode, M. T., S. W. Gosavi, Y. B. Khollam, B. B. Kale, S. R. Jadkar, and K. C. Mohite. "Sol-gel deposition of nanocrystalline TiO2 thin films useful for hydrogen gas sensing application." In 2012 1st International Symposium on Physics and Technology of Sensors (ISPTS). IEEE, 2012. http://dx.doi.org/10.1109/ispts.2012.6260911.

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