Investigation Of Nanostructured Thin Films On Surface Acoustic Wave And Conductometric Transducers For Gas Sensing Applications
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Investigation Of Nanostructured Thin Films On Surface Acoustic Wave And Conductometric Transducers For Gas Sensing Applications
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Author : Rashidah Arsat
language : en
Publisher:
Release Date : 2009
Investigation Of Nanostructured Thin Films On Surface Acoustic Wave And Conductometric Transducers For Gas Sensing Applications written by Rashidah Arsat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Gas detectors categories.
Engineered Nanostructured Thin Films For Enhanced Surface Acoustic Wave Sensors
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Author : Jonathan K. Kwan
language : en
Publisher:
Release Date : 2013
Engineered Nanostructured Thin Films For Enhanced Surface Acoustic Wave Sensors written by Jonathan K. Kwan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Nanostructured Gas Sensors
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Author : Ankur Gupta
language : en
Publisher: CRC Press
Release Date : 2023-01-06
Nanostructured Gas Sensors written by Ankur Gupta and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-01-06 with Science categories.
Nanostructured materials exhibit distinct properties by virtue of their nanoscale morphological variations, which open up endless possibilities to investigate unexplored and interesting applications. This textbook broadly covers the fabrication and characterization of nanostructured films and exploration of their gas-sensing applications. It presents the fundamentals of gas-sensing technology and a comprehensive study on smart gas sensing technology. Readers will find basics, analytical techniques, nanotechnology-enabled experimental findings, and future directions of smart gas-sensing technology at one place. Through the inclusion of up-to-date experimental knowledge of synthesis, processing, and application development, the book is suitable for academics at all levels.
Theoretical And Experimental Investigation On The Use Of Surface Acoustic Wave Sensors For Evaluating The Adhesion Of Su 8 Thin Films
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Author : Mohamed M. T. E. L. Gowini
language : en
Publisher:
Release Date : 2015
Theoretical And Experimental Investigation On The Use Of Surface Acoustic Wave Sensors For Evaluating The Adhesion Of Su 8 Thin Films written by Mohamed M. T. E. L. Gowini and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Acoustic surface wave devices categories.
This research investigates the use of a SU-8/AlN/Si SAW sensor for evaluating the adhesion of SU-8 thin films. A theoretical model is developed to plot the wave dispersion profile for the SU-8/AlN/Si configuration. A spring interface model is utilized to represent the SU-8/AlN interface using a series of massless springs with stiffness K (N/m^3). The value of the interface spring stiffness K is changed to represent different levels of SU-8 adhesion. The wave dispersion profiles for the intermediate adhesion levels are plotted using the theoretical model. The change in wave velocity due to the change in adhesion of the SU-8 thin film is evaluated. The sensitivities of different configurations of the SU-8/AlN/Si SAW sensors are investigated. Four SAW sensor designs are selected to evaluate the adhesion of the SU-8 thin film. The four SAW sensors operate in the frequency range of 84-208MHz. A process flow for fabricating the SAW sensors at the University of Alberta micro-and nanofabrication facility "nanofab" is developed. The fabricated sensors are packaged using wire bonding to allow measurement of their frequency responses using a Vector Network Analyzer. For each of the four SAW sensor designs two sensor configurations will be developed. In one configuration the SU-8 film will be patterned on top of a thin gold film on the surface of the AlN/Si layers and in the second configuration the gold film will be coated with an Omnicoat layer prior to patterning the SU-8 film. Omnicoat is an adhesion promoter that is widely used to improve the adhesion of SU-8 to gold. The frequency responses from both sensor configurations are measured for each of the four SAW sensor designs and the frequency shift is evaluated. The frequency shift illustrates the change in adhesion of the SU-8 film with and without omnicoat. The phase velocity values also shift to a higher value for the sensor configurations without omnicoat. As the adhesion of the SU-8 film drops in the absence of omnicoat the stresses transferred to the SU-8 layer drop and accordingly the wave propagation is concentrated in the AlN/Si layers, which have a higher wave velocity than SU-8. However, in the presence of omnicoat the adhesion of the SU-8 layer improves and the surface acoustic wave propagates in the SU-8 layer, which leads to a drop in the phase velocity. The theoretical model is used to find the equivalent interface spring stiffness values for the two cases of SU-8 adhesion i.e. with and without omnicoat. This is accomplished by curve fitting the dispersion curves to the phase velocity values for from both sensor configurations. The equivalent interface spring stiffness values are found to be 8.0992 x10^9 N/m^3 and 7.9492x10^9 N/m3 for the SAW sensors with omnicoat and without omnicoat, respectively. These values indicate that when omnicoat is used as an adhesion promoter for SU-8 the interface spring stiffness increases due to the improved adhesion. However, without omnicoat the adhesion of the SU-8 layer drops, which corresponds to the lower interface spring stiffness value.
Measurement Instrumentation And Sensors Handbook
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Author : John G. Webster
language : en
Publisher: CRC Press
Release Date : 2017-12-19
Measurement Instrumentation And Sensors Handbook written by John G. Webster and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Medical categories.
The Second Edition of the bestselling Measurement, Instrumentation, and Sensors Handbook brings together all aspects of the design and implementation of measurement, instrumentation, and sensors. Reflecting the current state of the art, it describes the use of instruments and techniques for performing practical measurements in engineering, physics, chemistry, and the life sciences and discusses processing systems, automatic data acquisition, reduction and analysis, operation characteristics, accuracy, errors, calibrations, and the incorporation of standards for control purposes. Organized according to measurement problem, the Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement volume of the Second Edition: Contains contributions from field experts, new chapters, and updates to all 98 existing chapters Covers sensors and sensor technology, time and frequency, signal processing, displays and recorders, and optical, medical, biomedical, health, environmental, electrical, electromagnetic, and chemical variables A concise and useful reference for engineers, scientists, academic faculty, students, designers, managers, and industry professionals involved in instrumentation and measurement research and development, Measurement, Instrumentation, and Sensors Handbook, Second Edition: Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement provides readers with a greater understanding of advanced applications.
Measurement Instrumentation And Sensors Handbook Second Edition
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Author : John G. Webster
language : en
Publisher: CRC Press
Release Date : 2014-02-03
Measurement Instrumentation And Sensors Handbook Second Edition written by John G. Webster and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-02-03 with Medical categories.
The Second Edition of the bestselling Measurement, Instrumentation, and Sensors Handbook brings together all aspects of the design and implementation of measurement, instrumentation, and sensors. Reflecting the current state of the art, it describes the use of instruments and techniques for performing practical measurements in engineering, physics, chemistry, and the life sciences and discusses processing systems, automatic data acquisition, reduction and analysis, operation characteristics, accuracy, errors, calibrations, and the incorporation of standards for control purposes. Organized according to measurement problem, the Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement volume of the Second Edition: Contains contributions from field experts, new chapters, and updates to all 98 existing chapters Covers sensors and sensor technology, time and frequency, signal processing, displays and recorders, and optical, medical, biomedical, health, environmental, electrical, electromagnetic, and chemical variables A concise and useful reference for engineers, scientists, academic faculty, students, designers, managers, and industry professionals involved in instrumentation and measurement research and development, Measurement, Instrumentation, and Sensors Handbook, Second Edition: Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement provides readers with a greater understanding of advanced applications.
Sensors For Environmental Control Proceedings Of The International Workshop On New Environmentals
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Author : Pietro Siciliano
language : en
Publisher: World Scientific
Release Date : 2003-04-03
Sensors For Environmental Control Proceedings Of The International Workshop On New Environmentals written by Pietro Siciliano and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-04-03 with Science categories.
This book contains updated results of both theoretical and applied research in the field of sensors and methods for environmental control, mainly with regard to the detection of pollutant species in gaseous and liquid ambients.The main arguments are related to: development of new nanostructured materials as sensing layers and new detection mechanisms; development of micro- and nano-systems and their integration in miniaturised instruments; application of innovative devices in the detection of contaminant chemical species and their monitoring.The proceedings have been selected for coverage in:• Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)
Environmental Gas Sensors Based On Nanostructured Thin Films
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Author : Atanu Dutta
language : en
Publisher:
Release Date : 2020
Environmental Gas Sensors Based On Nanostructured Thin Films written by Atanu Dutta and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Technology & Engineering categories.
Since the discovery of electron microscopes, nanomaterials and nanotechnology have been influencing academic and industrial research greatly for bringing out newer and better products with improved materials,Äô properties. In the field of environmental gas sensors too, the demonstration of nanomaterials for sensing various gases has become a common practice. Environmental gas pollution has turned out to be a huge concern in the society due to the progress of civilization. The awareness of health hazard for different toxic/polluting gases and rectification measure by imposing stricter norms has prompted extensive research to develop efficient gas sensors to detect trace level of pollution from various sources. Thin film, ultrathin film, and nanostructure materials of metal oxide semiconductor, polymer, metal, carbon nanotube, graphene, etc. with or without sensitizers have been investigated for sensing various toxic gases. New device structures have been fabricated to achieve high sensitivity, selectivity, fast response, etc. The microstructure and thickness of film are found to influence the performance greatly. Various methods of preparations and mechanism of sensing are being explored. All these aspects and the challenges were discussed in this chapter.
The Investigation Of Coating Techniques For Surface Acoustic Wave Gas Sensors
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Author : A. A. Bello
language : en
Publisher:
Release Date : 1988
The Investigation Of Coating Techniques For Surface Acoustic Wave Gas Sensors written by A. A. Bello and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.
Nanomaterial Synthesis And Integration For Sensors Electronics Photonics And Electro Optics
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Author : Nibir K. Dhar
language : en
Publisher: SPIE-International Society for Optical Engineering
Release Date : 2006
Nanomaterial Synthesis And Integration For Sensors Electronics Photonics And Electro Optics written by Nibir K. Dhar and has been published by SPIE-International Society for Optical Engineering this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Technology & Engineering categories.
Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.