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| Author | : Daniel Gallagher |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2009 |
| Genre | : Acoustic surface wave filters |
| ISBN | : |
| Author | : Daniel Gallagher |
| Publisher | : |
| Total Pages | : 288 |
| Release | : 2009 |
| Genre | : Acoustic surface wave filters |
| ISBN | : |
| Author | : H. Wohltjen |
| Publisher | : |
| Total Pages | : 21 |
| Release | : 1985 |
| Genre | : |
| ISBN | : |
This paper describes some of the operational characteristics and performance limitations of microfabricated sensors for chemical vapors which use surface acoustic wave (SAW) phenomena to probe a vapor sensitive coating. Comparisons are made with bulk wave piezoelectric crystal sensors and key technical challenges for future development of SAW vapor sensors are discussed.
| Author | : D. S. Ballantine Jr. |
| Publisher | : Elsevier |
| Total Pages | : 451 |
| Release | : 1996-10-21 |
| Genre | : Science |
| ISBN | : 0080523331 |
Written by an interdisciplinary group of experts from both industry and academia, Acoustic Wave Sensors provides an in-depth look at the current state of acoustic wave devices and the scope of their use in chemical, biochemical, and physical measurements, as well as in engineering applications. Because of the inherent interdisciplinary applications of these devices, this book will be useful for the chemist and biochemist interested in the use and development ofthese sensors for specific applications; the electrical engineer involved in the design and improvement of these devices; the chemical engineer and the biotechnologist interested in using these devices for process monitoring and control; and the sensor community at large. Provides in-depth comparison and analyses of different types of acoustic wave devices Discusses operating principles and design considerations Includes table of relevant material constants for quick reference Presents an extensive review of current uses of these devices for chemical, biochemical, and physical measurements, and engineering applications
| Author | : Don Dissanayake |
| Publisher | : IntechOpen |
| Total Pages | : 478 |
| Release | : 2010-09-28 |
| Genre | : Technology & Engineering |
| ISBN | : 9789533071114 |
SAW devices are widely used in multitude of device concepts mainly in MEMS and communication electronics. As such, SAW based micro sensors, actuators and communication electronic devices are well known applications of SAW technology. For example, SAW based passive micro sensors are capable of measuring physical properties such as temperature, pressure, variation in chemical properties, and SAW based communication devices perform a range of signal processing functions, such as delay lines, filters, resonators, pulse compressors, and convolvers. In recent decades, SAW based low-powered actuators and microfluidic devices have significantly added a new dimension to SAW technology. This book consists of 20 exciting chapters composed by researchers and engineers active in the field of SAW technology, biomedical and other related engineering disciplines. The topics range from basic SAW theory, materials and phenomena to advanced applications such as sensors actuators, and communication systems. As such, in addition to theoretical analysis and numerical modelling such as Finite Element Modelling (FEM) and Finite Difference Methods (FDM) of SAW devices, SAW based actuators and micro motors, and SAW based micro sensors are some of the exciting applications presented in this book. This collection of up-to-date information and research outcomes on SAW technology will be of great interest, not only to all those working in SAW based technology, but also to many more who stand to benefit from an insight into the rich opportunities that this technology has to offer, especially to develop advanced, low-powered biomedical implants and passive communication devices.
| Author | : Michael Thompson |
| Publisher | : Wiley-Interscience |
| Total Pages | : 224 |
| Release | : 1997-04-11 |
| Genre | : Science |
| ISBN | : |
This book concerns the design, operation and application of devices capable of generating acoustic waves in the ultrasonic frequency range. It emphasizes the study of chemical and/or biochemical systems imposed on the surface of such devices, whether operated in the gas- or liquid-phase, i.e. on acoustic wave chemical and biological sensors. It focuses on devices that employ acoustic waves launched and received on the same surface. It touches upon such diverse areas as acoustic wave physics, applied mathematics, chemistry, electronics, fluid mechanics, materials science and polymer science.
| Author | : Dennis M. Davis |
| Publisher | : |
| Total Pages | : 29 |
| Release | : 1988 |
| Genre | : |
| ISBN | : |
Surface Acoustic Wave (SAW) devices are potentially useful as small, sensitive chemical vapor sensors. The operating principles of these devices have been described in detail. The use of SAW devices for detecting dimethyl methylphosphonate (DMMP) vapor has been reported elsewhere. The basic operating principle of the SAW devices is the reversible adsorption of chemical vapors by adsorbent coatings that are sensitive and selective to the vapor that one is trying to detect. That is, SAW devices act as mass sensitive detectors. The SAW device used in this study consists of an array of four coated sensor elements with each coating giving a characteristic response to each of the vapors to be detected. The coatings used for the four sensors are fluoropolyol (FPOL), poly(ethylene maleate) (PEM), ethyl cellulose (ECEL), and polyvinyl pyrrolidone (PVP). Surface acoustic wave, Microsensors, Detection, Chemical warfare agents. (mjm).
| Author | : G. Sberveglieri |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 413 |
| Release | : 2012-12-06 |
| Genre | : Technology & Engineering |
| ISBN | : 9401127379 |
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 | : Dennis M. Davis |
| Publisher | : |
| Total Pages | : 28 |
| Release | : 1988 |
| Genre | : |
| ISBN | : |
Surface Acoustic Wave (SAW) devices are potentially useful as small, sensitive chemical vapor sensors. The operating principles of these devices have been described in detail. Their use in detecting dimethyl methylphosphonate vapor has been reported previously. The basic operating principle for the SAW devices is the reversible adsorption of chemical vapors by adsorbent coatings that are sensitive and selective to the vapors that one is trying to detect. That is, SAW devices act as mass sensitive detectors. The SAW device used in this study consists of an array of four coated sensor elements with each coating giving a characteristic response to each of the vapors to be detected. Surface acoustic wave, Microsensors, Simulants, Detection. (mjm).
| Author | : H. Wohltjen |
| Publisher | : |
| Total Pages | : 42 |
| Release | : 1984 |
| Genre | : Acoustic surface wave devices |
| ISBN | : |
Surface acoustic wave (SAW) devices offer many attractive features for application as vapor phase chemical microsensors. This paper describes the characteristics of SAW devices and techniques by which they can be employed as vapor sensors. The perturbation of SAW amplitude and velocity by polymeric coating films was investigated both theoretically and experimentally. High sensitivity can be achieved when the device is used as the resonating element in a delay line oscillator circuit. A simple equation has been developed from theoretical considerations which offers reasonably accurate quantitative predictions of SAW Device frequency shifts when subjected to a given mass loading. In this mode the SAW device behaves in a fashion very similar to conventional bulk wave quartz crystal microbalance except that the sensitivity can be several orders of magnitude higher and the device size can be several orders of magnitude smaller. Detection of mass changes of less than 1 femtogram by a SAW device having a surface area of 0.0001 square cm. is theoretically possible.
