Download or read book Tio2 Thick Film Gas Sensor written by Chandrakant Dighavkar and published by LAP Lambert Academic Publishing. This book was released on 2011-07 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid state gas sensors have proved to be very promising for monitoring the emission of air pollutant and toxic gases because they are a low cost element. Titanium dioxide (TiO2) is metal oxide semiconductor.TiO2 has been extensively studied owing to its wide range of applications which include photo catalysis, heterogeneous catalysis, energy storage, solar cell components, corrosion-protective coatings,optical coatings and gas sensing.The objectives of this project was to study the structural, electrical and gas sensing properties of undoped and doped TiO2 thick films.Gas sensing properties of the films were studied in static gas sensing system by exposing the films to the different gases as CO2, H2S, NH3,Ethanol, LPG and NO2 at different operating temperatures. The optimum operating temperature,sensitivity, selectivity, response, recovery time and the active region of detected gas were determined.Results showed that the doping alters the orientation of microstructure, grain size, composition, electrical and gas sensing characteristics.TiO2 films were observed to be most sensitive to reducing gases than oxidizing gases.
Download or read book Novel Strategies for Design of High Temperature Titania based Gas Sensors for Combustion Process Monitoring written by Marla Lea Frank and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: TiO2 -based sensors were developed and characterized for improvement of selectivity and sensitivity towards CO gas at high temperatures. Selectivity was improved by combining several sensors into an array, while sensitivity improvement was studied by examination of the effects of various metal and metal oxide additives and reactive sputtering film preparation. TiO2-based sensors containing La2O3 and La2O3/CuO were combined into an array for testing of CO and O2 gas mixtures. Nonlinear regression analysis was developed to determine the concentrations of gases in the mixture. The regression technique can be used to determine the prediction ability of gas sensor combinations for given gas concentration ranges using a defined orthogonality index, as well as to determine the amount of each gas in the mixture based on the responses of a set of sensors. The prediction ability for a La2O3-containing sensor combined with La2O3/CuO-containing sensors with varying levels of CuO are compared for a range of CO and O2 concentrations. Concentrations of CO and O2 in gas mixtures are predicted using the La2O3- and La2O3/CuO-containing sensors and the regression analysis. Addition of various metals and metal oxides, including Au, CuO and La2O3 to TiO2-based gas sensors has been examined to determine the effect of additives on the gas-surface reactivity and electrical response of the sensors. Electrical measurements show that sensor sensitivity is decreased upon addition of La2O3 with only a slight increase in sensitivity when CuO is added to La2O3-containing sensors. Au, however, was found to increase the sensitivity of the TiO2-based sensors with and without La2O3. Gas chromatography was used to determine the catalytic conversion of CO for the various sensor materials at different temperatures for comparison with electrical measurements. General guidelines for additive selection have been proposed based on the results. Reactively sputtered thin film TiO2 gas sensors have been fabricated and characterized for improved sensitivity to CO gas. Sensitivity of optimized thin film sensors to CO was found to be much higher than for traditional thick film TiO2-based sensors. Characterization of the phase and morphology of the sensors using XRD, TEM and AFM show that the film consists of a dense layer of TiO2 in the rutile phase, with surface roughness changing with film thickness. Sensitivity of the thin film sensor could be varied by changing the film thickness, with a film thickness of 240 nm showing the best sensitivity to CO gas, although response and recovery times were slow.
Download or read book Gas Sensors written by G. Sberveglieri and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: There were two reasons that induced me to plan and to organize this book, the first was the lack of a text entirely devoted to the subject of gas sensors, notwithstanding some books devoted to the various kind of chemical sensors have recently been published. The second reason was the need of introducing the basic topics of gas detection mechanisms to a growing number of researchers active in research and development laboratories of industries and uni versities. The field of chemical sensors is indeed in fast and consistent growth, as it is proved by the increased number of participants to the congresses that were recently held on this subject, namely the Third Meeting on Chemical Sensors (September 24 - 26, 1990, Cleveland), Transducers' 91 (June 24 - 27, 1991, S. Francisco) and EUROSENSORS V (September 30 - October 3, 1991, Rome). Therefore, this book is mainly intended as a reference text for researchers with a MS degree in physics, chemistry and electrical engineering; it reports the last progresses in the R. & D. and in the technology of gas sensors. I choose to deal specifically with the topic of gas sensors because these devices show a very large number of applications in the domestic and industrial field and they are characterized by a great effort of research and development.
Download or read book Titanium Dioxide based Carbon Monoxide Gas Sensors written by Zachary Mark Seeley and published by . This book was released on 2009 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TiO2 Thin Films Produced by Ultrasonic Agitation Assisted Sol Gel for Propane Gas Sensor written by Dwight Acosta-Najarro and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: TiO2 films were deposited by the sol,Äìgel dip coating method assisted by ultra sonic agitation, for their use as propane gas sensors. XRD anlaysis revealed the TiO2 anatase phase for all samples. The film thickness was controlled with the number of the dip-coating immersion cycles, obtaining thicknesses from 10 to 130¬†nm and a growing rate of 18¬†nm per immersion. Surface morphology shows that films grow more compact and densely packed as the number of immersion cycles increase. Gas sensing studies indicate that work temperatures above 300¬∞C are needed for sensing activation of the films. Gas sensors sensitivity as a function of propane concentration and film thickness revealed a two-regime behavior: for partial pressures of propane above 400¬†ppm the sensitivity is not dependent of the film thickness, whereas it is dependent on this parameter at lower partial pressures. Such behavior is attributed to a space charge region and a change in surface structure. For the low concentration regime, the maximum sensitivity was obtained for a film thickness of 110¬†nm or 5 inmersions.
Download or read book Science and Technology of Chemiresistor Gas Sensors written by Dinesh K. Aswal and published by Nova Publishers. This book was released on 2007 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas sensor technology has advanced remarkably during past few decades and has become one of the indispensable technologies for modern society. Varieties of gas sensors are commercially available and, using innovative ideas, efforts are being made to develop gas sensors of next generation having very small size with very low power consumption. The ultimate model for this is probably given by sensory organs of our own body, which are implanted finely and work well with a very modest amount of energy. In order to achieve this goal, it is essential that various aspects of gas sensors are seriously considered. These include understanding of gas sensing mechanisms, development of new materials and methods to synthesise them into selective sensors, innovations in nanostructured materials, measurement methods, microfabrication of sensors, exploring intelligent sensing system, etc. This book examines these issues pertaining to chemiresistive gas sensors.
Download or read book Chemical Sensing with Solid State Devices written by Marc J. Madou and published by Elsevier. This book was released on 2012-12-02 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a lucid presentation for chemists, electrical engineers, surface scientists, and solid-state physicists, of the fundamentals underlying the construction of simple and small chemical sensors. The first part of the book is a review of the theoretical background in solid state physics, chemistry and electronics. Semiconductor and solid electrolyte bulk models are reviewed as well as solid/gas and solid/liquid interface models. Membranes and catalysis theory are also covered expansively. The second part is a discussion of more complete sensor devices, their essential components, and of the important developments in this area over the last fifteen to twenty years. The book provides guidance through the multidisciplinary world of chemical sensors. It should be understandable to students with some training in physics and chemistry and a general knowledge of electronics. Finally, comments on economic considerations in the development of new sensor products and suggestionsfor future research and development should be of value to company R&D planners.
Download or read book Science and Technology of Chemiresistor Gas Sensors written by Dinesh K. Aswal and published by Nova Publishers. This book was released on 2007 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas sensor technology has advanced remarkably during past few decades and has become one of the indispensable technologies for modern society. Varieties of gas sensors are commercially available and, using innovative ideas, efforts are being made to develop gas sensors of next generation having very small size with very low power consumption. The ultimate model for this is probably given by sensory organs of our own body, which are implanted finely and work well with a very modest amount of energy. In order to achieve this goal, it is essential that various aspects of gas sensors are seriously considered. These include understanding of gas sensing mechanisms, development of new materials and methods to synthesise them into selective sensors, innovations in nanostructured materials, measurement methods, microfabrication of sensors, exploring intelligent sensing system, etc. This book examines these issues pertaining to chemiresistive gas sensors.
Download or read book Sensors for Chemical and Biological Applications written by Manoj Kumar Ram and published by CRC Press. This book was released on 2018-10-03 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, sensor research has undergone a quiet revolution that will have a significant impact on a broad range of applications in areas such as health care, the environment, energy, food safety, national security, and manufacturing. Sensors for Chemical and Biological Applications discusses in detail the potential of chemical and biological sensors and examines how they are meeting the challenges of chem-bio terrorism by monitoring through enhanced specificity, fast response times, and the ability to determine multiple hazardous substances. Exploring the nanotechnology approach, and carrying this theme throughout the book, the chapters cover the sensing principles for, chemical, electrical, chromatographic, magnetic, biological, fluidic, optical, and ultrasonic and mass sensing systems. They address issues associated with cost, synthesis, and testing of new low cost materials with high sensitivity, selectivity, robustness, and speed for defined sensor applications. The book extensively discusses the detailed analysis of future impact of chemical and biological sensors in day-to-day life. Successful development of improved chemical sensor and biosensor systems and manufacturing procedures will not only increase the breadth and depth of the sensor industry, but will spill over into the design and manufacture of other types of sensors and devices that use nanofabrication and microfabrication techniques. This reference not only supplies versatile, hands-on tools useful in a broad array of disciplines, but also lays the interdisciplinary groundwork required for the achievement of sentient processing.
Download or read book The Study of Thin Film TiO2 Nb and TiO2 Cr as Gas Sensors written by Aminooraza Abd. Razak and published by . This book was released on 2009 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrospinning for High Performance Sensors written by Antonella Macagnano and published by Springer. This book was released on 2015-04-07 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to present the different aspects of electrospinning for designing and fabricating high performing materials for sensors applied in gaseous and liquid environments. Since electrospinning is a versatile and inexpensive manufacturing technology, the book emphasizes the industrial applications perspective. The volume is an edited collection of the most recent and encouraging results concerning advanced nanostructured (bio) sensors. The feats achieved by these sensors range from high sensitivity to extreme operating conditions and satisfy a wide range of requirements. Most of the contributions in this book come from First International Workshop on Electrospinning for High Performance Sensing (EHPS2014) that was held in Rome in 2014, as part of the European COST Action MP1206 Electrospun Nanofibres for bio inspired composite materials and innovative industrial applications.
Download or read book Metal Oxide Nanostructures as Gas Sensing Devices written by G. Eranna and published by Taylor & Francis. This book was released on 2016-04-19 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanostructures as Gas Sensing Devices explores the development of an integrated micro gas sensor that is based on advanced metal oxide nanostructures and is compatible with modern semiconductor fabrication technology. This sensor can then be used to create a compact, low-power, handheld device for analyzing air ambience.The book first c
Download or read book Nanostructured Titanium Dioxide Materials written by Ali Reza Khataee and published by World Scientific. This book was released on 2012 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ch. 1. Introduction -- ch. 2. Properties of titanium dioxide and its nanoparticles. 2.1. Structural and crystallographic properties. 2.2. Photocatalytic properties of nanostructured titanium dioxide -- ch. 3. Preparation of nanostructured titanium dioxide and titanates. 3.1. Vapor deposition method. 3.2. Solvothermal method. 3.3. Electrochemical approaches. 3.4. Solution combustion method. 3.5. Microemulsion technique. 3.6. Micelle and inverse Micelle methods. 3. 7. Combustion flame-chemical vapor condensation process. 3.8. Sonochemical reactions. 3.9. Plasma evaporation. 3.10. Hydrothermal processing. 3.11. Sol-Gel technology -- ch. 4. Applications of nanostructured titanium dioxide. 4.1. Dye-sensitized solar cells. 4.2. Hydrogen production. 4.3. Hydrogen storage. 4.4. Sensors. 4.5. Batteries. 4.6. Cancer prevention and treatment. 4.7. Antibacterial and self-cleaning applications. 4.8. Electrocatalysis. 4.9. Photocatalytic applications of titanium dioxide nanomaterials -- ch. 5. Supported and immobilized titanium dioxide nanomaterials. 5.1. Immobilization on glass substrates. 5.2. Immobilization on stone, ceramic, cement and zeolite. 5.3. Immobilization on metallic and metal oxide materials. 5.4. Immobilization on polymer substrates
Download or read book Sensing Technology Current Status and Future Trends I written by Alex Mason and published by Springer Science & Business Media. This book was released on 2013-12-09 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written for academic and industry professionals working in the field of sensing, instrumentation and related fields, and is positioned to give a snapshot of the current state of the art in sensing technology, particularly from the applied perspective. The book is intended to give a broad overview of the latest developments, in addition to discussing the process through which researchers go through in order to develop sensors, or related systems, which will become more widespread in the future.
Download or read book TMS 2020 149th Annual Meeting Exhibition Supplemental Proceedings written by The Minerals, Metals & Materials Society and published by Springer Nature. This book was released on 2020-02-13 with total page 2046 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection presents papers from the 149th Annual Meeting & Exhibition of The Minerals, Metals & Materials Society.
Download or read book Sensors and Microsystems written by Corrado Di Natale and published by World Scientific. This book was released on 2004 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes a selection of papers presented at the 8th Italian Conference on Sensors and Microsystems. It contains contributions on sensors, microsystems, actuators and related interface electronics. Aspects of chemistry, biology and materials science are also covered. In addition, special sensor applications of industrial interest are presented and discussed.The proceedings have been selected for coverage in: ? Materials Science Citation Index?? Index to Scientific & Technical Proceedings? (ISTP? / ISI Proceedings)? Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)? CC Proceedings ? Engineering & Physical Sciences
Download or read book Metal Oxide Semiconductors written by Zhigang Zang and published by John Wiley & Sons. This book was released on 2023-12-11 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Semiconductors Up-to-date resource highlighting highlights emerging applications of metal oxide semiconductors in various areas and current challenges and directions in commercialization Metal Oxide Semiconductors provides a current understanding of oxide semiconductors, covering fundamentals, synthesizing methods, and applications in diodes, thin-film transistors, gas sensors, solar cells, and more. The text presents state-of-the-art information along with fundamental prerequisites for understanding and discusses the current challenges in pursuing commercialization and future directions of this field. Despite rapid advancements in the materials science and device physics of oxide semiconductors over the past decade, the understanding of science and technology in this field remains incomplete due to its relatively short research history; this book aims to bridge the gap between the rapidly advancing research progress in this field and the demand for relevant materials and devices by researchers, engineers, and students. Written by three highly qualified authors, Metal Oxide Semiconductors discusses sample topics such as: Fabrication techniques and principles, covering vacuum-based methods, including sputtering, atomic layer deposition and evaporation, and solution-based methods Fundamentals, progresses, and potentials of p–n heterojunction diodes, Schottky diodes, metal-insulator-semiconductor diodes, and self-switching diodes Applications in thin-film transistors, detailing the current progresses and challenges towards commercialization for n-type TFTs, p-type TFTs, and circuits Detailed discussions on the working mechanisms and representative devices of oxide-based gas sensors, pressure sensors, and PH sensors Applications in optoelectronics, both in solar cells and ultraviolet photodetectors, covering their parameters, materials, and performance Memory applications, including resistive random-access memory, transistor-structured memory devices, transistor-structured artificial synapse, and optical memory transistors A comprehensive monograph covering all aspects of oxide semiconductors, Metal Oxide Semiconductors is an essential resource for materials scientists, electronics engineers, semiconductor physicists, and professionals in the semiconductor and sensor industries who wish to understand all modern developments that have been made in the field.
