Download or read book Electrical studies on the response characteristics of tin dioxide based semiconductor gas sensors written by Pentti Romppainen and published by . This book was released on 1988 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semiconductor Gas Sensors written by Raivo Jaaniso and published by Woodhead Publishing. This book was released on 2019-09-24 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor Gas Sensors, Second Edition, summarizes recent research on basic principles, new materials and emerging technologies in this essential field. Chapters cover the foundation of the underlying principles and sensing mechanisms of gas sensors, include expanded content on gas sensing characteristics, such as response, sensitivity and cross-sensitivity, present an overview of the nanomaterials utilized for gas sensing, and review the latest applications for semiconductor gas sensors, including environmental monitoring, indoor monitoring, medical applications, CMOS integration and chemical warfare agents. This second edition has been completely updated, thus ensuring it reflects current literature and the latest materials systems and applications. - Includes an overview of key applications, with new chapters on indoor monitoring and medical applications - Reviews developments in gas sensors and sensing methods, including an expanded section on gas sensor theory - Discusses the use of nanomaterials in gas sensing, with new chapters on single-layer graphene sensors, graphene oxide sensors, printed sensors, and much more
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 Semiconducting Metal Oxides for Gas Sensing written by Yonghui Deng and published by Springer Nature. This book was released on 2023-08-23 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this book focuses on the synthesis, design, and application of semiconducting metal oxides as gas sensing materials, including the gas sensing mechanism, and modification methods for sensing materials, while also providing a comprehensive introduction to semiconductor gas sensing devices. As an essential part of IoT (Internet of things), gas sensors have shown great significance and promising prospects. Therefore, studies on functional mesoporous metal oxides, one of the most important gas sensing materials based on their unique Knudsen diffusion behavior and tailored pore structure, have increasingly attracted attention from various disciplines. The book offers a valuable reference guide to metal oxide gas sensing materials for undergraduate and graduate students alike. It will also benefit all researchers who are involved in synthesis and gas sensing of metal oxides nanomaterials with relevant frontier theories and concepts. Engineers working on research and development of semiconductor gas sensors will also find some new ideas for sensor design.
Download or read book The Stannic Oxide Gas SensorPrinciples and Applications written by Kousuke Ihokura and published by CRC Press. This book was released on 2017-12-14 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Stannic Oxide Gas Sensor presents a comprehensive overview of the background science and technology of the subject, including practical information on its applications and the electronic circuits with which it is associated. The book explains the chemistry of the device and covers typical methods of fabrication. Sensitivity and selectivity are addressed, and the problems of drift with ambient temperature, relative humidity, and time are fully discussed. The book also presents examples of industrial, commercial, and domestic applications. It explains the design of appropriate electronic circuits and describes methods for testing and characterizing sensors. Advantages and disadvantages of sensors are assessed as well.
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 Gas Sensors Based on Conducting Metal Oxides written by Nicolae Barsan and published by Elsevier. This book was released on 2018-10-17 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gas Sensors Based on Conducting Metal Oxides: Basic Understanding, Technology and Applications focuses on two distinct types of gas sensors based on conducting metal oxides. Ion conduction, applied in so-called solid-state electrolytic sensors for one, and electronic conduction used in semiconductivity gas sensors for the other. The well-known ?–probe, a key component to optimize combustion in car engines, is an example of the former type, and the in-cabin car air-quality control SnO2 and WO2 sensor array stands for the semiconductivity type. Chapters cover basic aspects of functioning principles and describe the technologies and challenges of present and future sensors. - Provides reader background and context on sensors, principles, fabrication and applications - Includes chapters on specific technological applications, such as exhaust sensors, environmental sensors, explosive gases alarms and more - Presents a structured presentation that allows for quick reference of vital information
Download or read book Enhancement of Nanocrystalline Zinc Oxide Based Electronic Gas Sensor by Surface Modification written by Yue Hou and published by . This book was released on 2014 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing concerns of industrial safety, chemical control and environmental pollution are spurring demand for high performance gas sensors. Growing use of gas sensors is making gas sensors on demand. After decades of research and development activities, semiconductor based gas sensors are now used in a variety of applications. However, challenges still remain in the area of sensitivity, selectivity, response and recovery speeds and power consumption. Therefore, improvement of metal oxide gas sensors by the incorporation of different technology is important. In this research, modification of metal oxide semiconductor based gas sensor by impurity doping, laser irradiation, and plasma treatment was investigated. Zinc oxide (ZnO) is an n-type semiconductor with a wide direct band gap (~3.3 eV) and large binding energy (~60 meV). Due to its superior electrical properties and chemical stability, ZnO has been considered one of the most promising materials for gas sensor applications. ZnO thin films have been fabricated by different techniques, such as rf magnetron sputtering, pulsed laser deposition, molecular beam epitaxy, and sol-gel. Sol-gel is a powerful alternative for vacuum deposition. The purpose of this research was to enhance properties and gas sensor performance of nanocrystalline so-gel derived ZnO thin films via surface modification techniques. The effects of process conditions, impurity doping, laser irradiation, laser doping and plasma treatment on properties and gas sensor performance were investigated. The gas sensor performance of ZnO thin films was investigated at different operating temperatures for various reducing and oxidizing gases such as H2, NH3, CH4 and NOx. Al-doped ZnO thin films were prepared using the sol-gel process by changing the Al concentration from 0 to 5.0 at% using two different Zn precursors. It was found that 3.0 at% Al-doped ZnO films had optimum properties such as high electrical conductivity, crystallinity, high sensing response and short response time for ZnO films derived with both Zn precursors. Ga-doped ZnO thin films were also presented by changing the concentration of Ga from 0.1 to 1.0 at%. The gas sensing behavior was investigated at an operating temperature of 130oC. It was found that the 0.3 at% Ga-doped ZnO thin film sensor had more than a 40% higher sensing response and a shorter response time than the sensors made with as-deposited films. Laser irradiation was utilized as a novel heat treatment method in this dissertation. A pulsed laser system with a wavelength of 532 nm was used as the irradiation source. Laser irradiation produced two kinds of Al-doped ZnO films depending on the laser energy level. The impact of laser irradiation was also varied according to the film thickness. The Al-doped ZnO sensors exhibited enhanced sensor performance with optimum laser fluence compared with that of as-deposited sensors. The results suggested that the crystallinity of the Al-doped ZnO thin films was essential to achieve an optimum gas detection capability. A laser doping process using a pre-deposited Al precursor layer for ZnO thin films was also investigated. Plasma treatment was utilized in the research with the intention to adjust the number of intrinsic defects in ZnO films. Both O2 and H2 plasmas were carried out with the treatment time varying from 3 to 15 min. The gas sensor performance was investigated for NH3 and NOx at various concentrations. An improvement of more than 50% in sensing response was observed with the optimum treatment time for NH3 detection. The impact of H2 plasma treatment of ZnO sensors on its gas sensor performance was also studied. The selectivity was studied for a likelihood mixture of reducing gases. The results indicated that ZnO sensors had a low detection limit towards NH3. It was found that the selectivity of these reducing gases was in the order of NH3> H2> CH4. However, unless high concentration of NH3 exposure is a factor, ZnO sensors are selective respond to H2. Furthermore, the ZnO sensors are also capable of discriminating different gases such as NH3, H2, CH4 and NOx. This research involves different techniques, which have been employed on the ZnO thin film based gas sensors in order to enhance the gas sensing characteristics such as sensing response and response time. As expected, the ZnO sensors exhibited high response, short response time and decent selectivity toward target gases with optimum treatment conditions. The results also suggested that the ZnO sensors were capable of detecting ppm level gases at relatively low operating temperature range (100 ~ 200oC), which is beneficial in many applications. Therefore, these techniques can be utilized to manufacture gas sensors using metal oxide semiconductors.
Download or read book Sulfur Dioxide Sensors written by Loveleen Kaur Gulati and published by Materials Research Forum LLC. This book was released on 2021-03-08 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent progress on the sensing and monitoring of sulfur dioxide in the environment is presented. The sensing materials covered include potentiometric gas sensors, amperometric sensors, optical sensors involving colorimetric and fluorescence changes, sensors based on ionic liquids, semiconducting metal-oxide sensors, photoacoustic detectors and biosensors. Keywords: Sulfur Dioxide Toxicity, Environmental Effects of SO2, Health Effects of SO2, Potentiometric Gas Sensing, Amperometric Gas Sensing, Optical Gas Sensing, Colorimetric Gas Sensing, Fluorescence-based Gas Sensing, Ionic Liquids for SO2 Sensing, Semiconducting Metal-Oxides for SO2 Detection, Photoacoustic Gas Detectors, Biosensors for SO2 Monitoring.
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 Solid State Gas Sensors written by P. T. Moseley and published by CRC Press. This book was released on 1987 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the principles & current technology of the main sensor types used for flammable gas detection, oxygen monitoring in combustion & car-exhaust control. Also includes toxic gas monitoring. A companion volume to Techniques & Mechanisms in Gas Sensing.
Download or read book Complex and Composite Metal Oxides for Gas VOC and Humidity Sensors Volume 2 written by Bal Chandra Yadav and published by Elsevier. This book was released on 2024-04-01 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approx.530 pages Provides an overview of the material preparation and synthesis strategies of metal oxide composite and metal oxide hybrid materials for use in gas and humidity sensors Reviews emerging advanced metal oxide materials such as perovskites, spinel ferrites, and quaternary materials for gas and VOC sensors Discusses the potential opportunities and challenges to be circumvented in the use of metal oxide materials to enable new sensor technologies
Download or read book Noble Metal Metal Oxide Hybrid Nanoparticles written by Satyabrata Mohapatra and published by Elsevier. This book was released on 2018-10-11 with total page 675 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noble Metal-Metal Oxide Hybrid Nanoparticles: Fundamentals and Applications sets out concepts and emerging applications of hybrid nanoparticles in biomedicine, antibacterial, energy storage and electronics. The hybridization of noble metals (Gold, Silver, Palladium and Platinum) with metal-oxide nanoparticles exhibits superior features when compared to individual nanoparticles. In some cases, metal oxides act as semiconductors, such as nano zinc oxide or titanium oxide nanoparticles, where their hybridization with silver nanoparticles, enhanced significantly their photocatalytic efficiency. The book highlights how such nanomaterials are used for practical applications. - Examines the properties of metal-metal oxide hybrid nanoparticles that make them so adaptable - Explores the mechanisms by which nanoparticles interact with each other, showing how these can be exploited for practical applications - Shows how metal oxide hybrid nanomaterials are used in a range of industry sectors, including energy, the environment and healthcare
Download or read book Doped Tin Oxide Gas Sensors written by Shriram Patil and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our society requires gas sensors for domestic, automotive, industrial applications due to the implication of gases in environmental control or dangerous emissions. Metal oxide resistive gas sensors are used in monitoring toxic gases as they offer very high sensitivity and relatively long-term stability. To enhance the sensor behavior doped semiconductor oxides material is used. In this context the author's contribution was to use the dopant like cobalt and molybdenum in noble material SnO2, which is the most extensively studied oxide for the sensor application. Its objectives were to develop a smart, mobile gas sensor system with low power consumption. For the synthesis spray Pyrolysis system has been used.To study the sensing characteristics towards detection of different gases and vapors, in air, compatible gas sensing systems were used. The author has investigated the influence of synthesis temperature, concentrations of precursor and dopant materials on gas sensing behavior in terms of the sensitivity, selectivity, response and recovery times. This book will help, who work on synthesis of thin films, especially using spray pyrolysis technique and the gas sensing characteristics.
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 Metal Oxide Nanostructures written by Daniela Nunes and published by Elsevier. This book was released on 2018-11-01 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanostructures: Synthesis, Properties and Applications covers the theoretical and experimental aspects related to design, synthesis, fabrication, processing, structural, morphological, optical and electronic properties on the topic. In addition, it reviews surface functionalization and hybrid materials, focusing on the advantages of these oxide nanostructures. The book concludes with the current and future prospective applications of these materials. Users will find a complete overview of all the important topics related to oxide nanostructures, from the physics of the materials, to its application. - Delves into hybrid structured metal oxides and their promising use in the next generation of electronic devices - Includes fundamental chapters on synthesis design and the properties of metal oxide nanostructures - Provides an in-depth overview of novel applications, including chromogenics, electronics and energy
Download or read book Advanced Gas Sensing written by Theodor Doll and published by Springer Science & Business Media. This book was released on 2011-06-27 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Gas Sensing focuses on the Electroadsorptive Effect: its theory, experimental measurement and applications in consumer gas sensors as well as in surface physics laboratory work. The Electroadsorptive Effect is invaluable when used in MEMS gas sensors. The authors use a general approach that covers new insights into temperature modulation and the use of light. The emphasis is given to electrical fields in gas sensors, which cause the Electroadsorptive Effect. The effect has long been known by experts working in the field, but has been regarded as too difficult for use until recently because of increasing sensor miniaturization. The book will serve as an introduction to sensitivity tuning of semiconductor gas sensors, introducing the underlying theory and experimental models before moving on to design considerations, applications and market considerations. A literature review and examples of experimental data are included.
