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Author: Stephen Lewis Publisher: ISBN: Category : Languages : en Pages : 229
Book Description
This dissertation describes the fabrication and operation of porous silicon gas sensors. The first chapter describes the motivation behind gas sensor research and provides the reader with background knowledge of gas sensors including the terminology and a review of various gas sensors. The following two chapters describe both how the porous silicon gas sensors are created and how they have been tested in the laboratory. Chapter 4 describes the steps required to create arrays of gas sensors to provide for a selective device through the application of patented selective coatings. Chapter 5 proposes a physical model that leads to a numerical solution for predicting the operation of the gas sensor. The next chapter builds from this model to analyze and optimize the experimental methods that are used to test both this and other gas sensors. The final chapter of this dissertation describes the prototype gas sensor system that has most recently been created, the company that was formed to further the development of that system, and the future applications of the porous silicon gas sensor.
Author: Stephen Lewis Publisher: ISBN: Category : Languages : en Pages : 229
Book Description
This dissertation describes the fabrication and operation of porous silicon gas sensors. The first chapter describes the motivation behind gas sensor research and provides the reader with background knowledge of gas sensors including the terminology and a review of various gas sensors. The following two chapters describe both how the porous silicon gas sensors are created and how they have been tested in the laboratory. Chapter 4 describes the steps required to create arrays of gas sensors to provide for a selective device through the application of patented selective coatings. Chapter 5 proposes a physical model that leads to a numerical solution for predicting the operation of the gas sensor. The next chapter builds from this model to analyze and optimize the experimental methods that are used to test both this and other gas sensors. The final chapter of this dissertation describes the prototype gas sensor system that has most recently been created, the company that was formed to further the development of that system, and the future applications of the porous silicon gas sensor.
Author: Serdar Ozdemir Publisher: ISBN: Category : Gas detectors Languages : en Pages :
Book Description
Nanopore covered microporous silicon interfaces have been formed via an electrochemical etch for gas sensor applications. Rapid reversible and sensitive gas sensors have been fabricated. Both top-down and bottom-up approaches are utilized in the process. A nano-pore coated micro-porous silicon surface is modified selectively for sub-ppm detection of NH3, PH3, NO, H2S, SO2. The selective depositions include electrolessly generated SnO2, CuxO, AuxO, NiO, and nanoparticles such as TiO2, MgO doped TiO2, Al2O3, and ZrO2. Flow dynamics are analyzed via numerical simulations and response data. A general coating selection method for chemical sensors is established via an extrapolation on the inverse of the Hard-Soft Acid-Base concept.
Author: Raivo Jaaniso Publisher: Woodhead Publishing ISBN: 0081025602 Category : Technology & Engineering Languages : en Pages : 510
Book Description
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
Author: Dong Thanh Lieu Publisher: ISBN: Category : Languages : en Pages : 138
Book Description
ABSTRACT: Single crystalline cubic silicon carbide (3C-SiC) is one of the promising materials that can be used for high-power, high-frequency, and high-temperature devices. Thus, preparation of high quality single crystalline cubic silicon carbide and reproducible fabricated electronic devices based on 3C-SiC will have important technological impacts. In this thesis, we have developed a method for the fabrication of heterojunction Schottky diode gas sensors based on porous silicon and silicon carbide. Due to the large surface area of the porous layer, the adsorb gas species modify the I-V behavior of the Schottky diode or the silicon/silicon carbide heterojunction. It was found that the I-V behavior of the Schottky diodes strongly depends on the type of gases used. It was shown that a shift in the breakdown voltage ranging from I0V to 40V could be obtained depending on the structure of the gas sensor and the types of gas used. The porous silicon was made by anodization of p-type silicon using a mixture of hydrofluoric acid and ethanol. Chemical vapor deposition (CVD) was used to grow silicon carbide. Fourier Transform Infrared Spectroscopy (FTIR) and Secondary Ion Mass Spectrometry (SIMS) were used to verify the existence and stoichiometry of SiC in the prepared samples. X-Ray Diffraction and Transmission Electron Microscopy (TEM) were used to verify the crystalline structure of resulting SiC. Atomic Force Microscopy (AFM) tests were used to view the surface morphology of resulting samples.
Author: Ghenadii Korotcenkov Publisher: Springer Science & Business Media ISBN: 1461473888 Category : Science Languages : en Pages : 453
Book Description
The two volumes of Handbook of Gas Sensor Materials provide a detailed and comprehensive account of materials for gas sensors, including the properties and relative advantages of various materials. Since these sensors can be applied for the automation of myriad industrial processes, as well as for everyday monitoring of such activities as public safety, engine performance, medical therapeutics, and in many other situations, this handbook is of great value. Gas sensor designers will find a treasure trove of material in these two books.
Author: Yonghui Deng Publisher: Springer Nature ISBN: 9819926211 Category : Science Languages : en Pages : 402
Book Description
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.
Author: Ghenadii Korotcenkov Publisher: CRC Press ISBN: 1482264579 Category : Science Languages : en Pages : 418
Book Description
Porous silicon is rapidly attracting increasing interest from various fields, including optoelectronics, microelectronics, photonics, medicine, chemistry, and biosensing. This nanostructured and biodegradable material has a range of unique properties that make it ideal for many applications. For example, the pores and surface chemistry of the mater
Author: G. Sberveglieri Publisher: Springer Science & Business Media ISBN: 9401127379 Category : Technology & Engineering Languages : en Pages : 413
Book Description
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.
Author: Stephen Lewis
Author: Stephen Lewis
Author: Dani Hak
Author: Serdar Ozdemir
Author: Raivo Jaaniso
Author: 
Author: Dong Thanh Lieu
Author: Ghenadii Korotcenkov
Author: Yonghui Deng
Author: Ghenadii Korotcenkov
Author: G. Sberveglieri