Download or read book New Approaches for the Basic Understanding of Semiconducting Metal Oxide Based Gas Sensors Sensing Transduction and Appropriate Modeling written by Michael Hübner and published by . This book was released on 2012-03-26 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Gas Sensing Fundamentals written by Claus-Dieter Kohl and published by Springer. This book was released on 2014-08-18 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, which addresses various basic sensor principles, covers micro gravimetric sensors, semiconducting and nano tube sensors, calorimetric sensors and optical sensors. Furthermore, the authors discuss recent developments in the related sensitive layers including new properties of nano structured metal oxide layers. They provide in-depth insights into the unique chemistry and signal generation of copper oxide in percolating sensors and present a variety of applications of functional polymers made possible by proper imprinting. Highlights of the subjects covered include: • requirements for high-temperature sensors • carbon nano tube sensors • new sensing model for nanostructured In2O3 • bio mimetic approach for semiconductor sensor-based systems • optical readout for inorganic and organic semiconductor sensors • concept of virtual multisensors to improve specificity and selectivity • calorimetric sensors for hydrogen peroxide detection • percolation effect-based sensors to implement dosimeters • imprinted polymer layers for bulk and surface acoustic wave sensors

Download or read book Selectivity Mechanisms of Gas sensitive Hetero structural Semiconducting Metal Oxides written by Janine Walker (Ph. D. in materials science) and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of facile methods to produce hetero-structural metal oxides with highly controlled nano-scale morphology could have implications for resistive-type gas sensing as well as related fields such as catalysis and energy applications. Nano-scale metal oxides are ideal materials for resistive-type sensors because surface processes can cause large modulation in resistance. For n-type metal oxides such as SnO2, ZnO, and TiO2 at elevated temperatures, ambient oxygen adsorbs onto the sensor surface and abstracts electrons from the material. When the metal oxide has dimensions in the range of the Debye length, the presence of this adsorbed oxygen can cause a significant effect on charge carriers in the sensing material. This surface charge accumulation causes upward band bending resulting in a high junction potential and a surface depletion layer which causes increased resistance. When a reducing gas is introduced, oxygen can react with the adsorbed gas molecules and electrons will be released back into the sensing material thereby decreasing resistance. This change in measured resistance can be used to detect ppm levels of a variety of reducing gasses. SnO2 based sensors in particular have shown good sensitivity and stability to a variety of important gasses. Improvements in sensitivity and selectivity would further increase the implementation of this technology. Decoration of p-type materials such as CuO, Co3O4, and NiO onto n-type metal oxides has shown to improve sensor sensitivity and selectivity. The reduction of free carriers in SnO2, due to the presence of a p-n junction results in band bending and resistance modulation. Increased surface reactivity can facilitate more reactions between adsorbed oxygen and the gas analyte. This may both improve resistance modulation and response time as well as improve gas selectivity. Performance improvement in these hetero-structural resistive-type sensors has often been attributed to: 1) Fermi level equilibration that results in charge carrier depletion in the major conducting channels and 2) Increased surface activity due to the catalytic nature of the decorated p-type metal oxides. However, fundamental understanding of the mechanisms dictating gas selectivity in hetero-structural sensors is lacking, necessitating the need for further investigation of selective sensing behavior. Selectivity improvements have been attributed to gas-surface interactions and the electronic structure of the two materials. In this dissertation, concepts relating both to receptive and transduction sensor mechanisms are explained. The effects due to gas surface interactions and electronic equilibration are compared and discussed. Both modeling efforts and experimental literature are presented to explain fundamental mechanisms that control sensor selectivity. In this dissertation, an overview of the mechanisms responsible for selective detection will be covered in Chapter 1 and Chapter 2. Chapter 3 will discuss synthesis and oxide selection. Chapter 4 and Chapter 5 will discuss the development of a database to find trends in resistive-type sensing research. Chapter 6 will show sensing results obtained to examine selectivity changes due to changes in oxide selection and oxide ratio. Chapter 7 will present mechanistic models that may be used to design selective sensing material. Finally, Chapter 8 will discuss future outlook and conclusions of this research.

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 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 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 Metal Oxide Nanoparticles 2 Volume Set written by Oliver Diwald and published by John Wiley & Sons. This book was released on 2021-09-14 with total page 903 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanoparticles A complete nanoparticle resource for chemists and industry professionals Metal oxide nanoparticles are integral to a wide range of natural and technological processes—from mineral transformation to electronics. Additionally, the fields of engineering, electronics, energy technology, and electronics all utilize metal oxide nanoparticle powders. Metal Oxide Nanoparticles: Formation, Functional Properties, and Interfaces presents readers with the most relevant synthesis and formulation approaches for using metal oxide nanoparticles as functional materials. It covers common processing routes and the assessment of physical and chemical particle properties through comprehensive and complementary characterization methods. This book will serve as an introduction to nanoparticle formulation, their interface chemistry and functional properties at the nanoscale. It will also act as an in-depth resource, sharing detailed information on advanced approaches to the physical, chemical, surface, and interface characterization of metal oxide nanoparticle powders and dispersions. Addresses the application of metal oxide nanoparticles and its economic impact Examines particle synthesis, including the principles of selected bottom-up strategies Explores nanoparticle formulation—a selection of processing and application routes Discusses the significance of particle surfaces and interfaces on structure formation, stability and functional materials properties Covers metal oxide nanoparticle characterization at different length scales With this valuable resource, academic researchers, industrial chemists, and PhD students can all gain insight into the synthesis, properties, and applications of metal oxide nanoparticles.

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.

Download or read book Nanostructure Based Sensors for Gas Sensing from Devices to Systems written by Sabrina Grassini and published by MDPI. This book was released on 2019-10-29 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of solid state gas sensors based on microtransducers and nanostructured sensing materials is the key point in the design of portable measurement systems able to reach sensing and identification performance comparable with analytical ones. In such a context several efforts must be spent of course in the development of the sensing material, but also in the choice of the transducer mechanism and its structure, in the electrical characterization of the performance and in the design of suitable measurement setups. This call for papers invites researchers worldwide to report about their novel results on the most recent advances and overview in design and measurements for applications in gas sensors, along with their relevant features and technological aspects. Original research papers are welcome (but not limited) on all aspects that focus on the most recent advances in: (i) basic principles and modeling of gas and VOCs sensors; (ii) new gas sensor principles and technologies; (iii) Characterization and measurements methodologies; (iv) transduction and sampling systems; (vi) package optimization; (vi) gas sensor based systems and applications.

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 Proceedings of the 12th Italian Conference Sensors and Microsystems Napoli Italy 12 14 February 2007 written by Girolamo Di Francia and published by World Scientific. This book was released on 2008 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a selection of papers presented at the 10th Italian Conference on Sensors and Microsystems. It provides a unique perspective on the research and development of sensors, microsystems and related technologies in Italy. The scientific values of the papers also offers an invaluable source to analysts intending to survey the Italian situation about sensors and microsystems. In an interdisciplinary approach, many aspects of the disciplines are covered, ranging from materials science, chemistry, applied physics, electronic engineering and biotechnologies.

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 Gas Sensors written by Sher Bahadar Khan and published by BoD – Books on Demand. This book was released on 2020-03-25 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the applications of nanomaterials in the fabrication of gas sensors. It covers recent developments of different materials used to design gas sensors, such as conducting polymers, semiconductors, as well as layered and nanosized materials. The widespread applications of various gas sensors for the detection of toxic gases are also discussed. The book provides a concise but thorough coverage of nanomaterials applications and utilization in gas sensors. In addition, it overviews recent developments in and the fabrication of gas sensors and their attributes for a broad audience, including beginners, graduate students, and specialists in both academic and industrial sectors.

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 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 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