Download or read book Film Bulk Acoustic Resonators of High Quality Factors in Liquid Environments for Biosensing Applications written by Wencheng Xu and published by . This book was released on 2011 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro-electro-mechanical systems (MEMS) film bulk acoustic resonator (FBAR) demonstrates label-free biosensing capabilities and is considered to be a promising alternative of quartz crystal microbalance (QCM). FBARs achieve great success in vacuum, or in the air, but find limited applications in liquid media because squeeze damping significantly degrades quality factor (Q) and results in poor frequency resolution. A transmission-line model shows that by confining the liquid in a thickness comparable to the acoustic wavelength of the resonator, Q can be considerably improved. The devices exhibit damped oscillatory patterns of Q as the liquid thickness varies. Q assumes its maxima and minima when the channel thickness is an odd and even multiple of the quarter-wavelength of the resonance, respectively. Microfluidic channels are integrated with longitudinal-mode FBARs (L-FBARs) to realize this design; a tenfold improvement of Q over fully-immersed devices is experimentally verified. Microfluidic integrated FBAR sensors have been demonstrated for detecting protein binding in liquid and monitoring the Vroman effect (the competitive protein adsorption behavior), showing their potential as a promising bio-analytical tool. A contour-mode FBAR (C-FBAR) is developed to further improve Q and to alleviate the need for complex integration of microfluidic channels. The C-FBAR consists of a suspended piezoelectric ring made of aluminum nitride and is excited in the fundamental radial-extensional mode. By replacing the squeeze damping with shear damping, high Qs (189 in water and 77 in human whole blood) are obtained in semi-infinite depth liquids. The C-FBAR sensors are characterized by aptamer - thrombin binding pairs and aqueous glycerine solutions for mass and viscosity sensing schemes, respectively. The C-FBAR sensor demonstrates accurate viscosity measurement from 1 to 10 centipoise, and can be deployed to monitor in-vitro blood coagulation processes in real time. Results show that its resonant frequency decreases as the viscosity of the blood increases during the fibrin generation process after the coagulation cascade. The coagulation time and the start/end of the fibrin generation are quantitatively determined, showing the C-FBAR can be a low-cost, portable yet reliable tool for hemostasis diagnostics.
Download or read book Multilayer Integrated Film Bulk Acoustic Resonators written by Yafei Zhang and published by Springer Science & Business Media. This book was released on 2012-08-28 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mulilayer Integrated Film Bulk Acoustic Resonators mainly introduces the theory, design, fabrication technology and application of a recently developed new type of device, multilayer integrated film bulk acoustic resonators, at the micro and nano scale involving microelectronic devices, integrated circuits, optical devices, sensors and actuators, acoustic resonators, micro-nano manufacturing, multilayer integration, device theory and design principles, etc. These devices can work at very high frequencies by using the newly developed theory, design, and fabrication technology of nano and micro devices. Readers in fields of IC, electronic devices, sensors, materials, and films etc. will benefit from this book by learning the detailed fundamentals and potential applications of these advanced devices. Prof. Yafei Zhang is the director of the Ministry of Education’s Key Laboratory for Thin Films and Microfabrication Technology, PRC; Dr. Da Chen was a PhD student in Prof. Yafei Zhang’s research group.
Download or read book Tuneable Film Bulk Acoustic Wave Resonators written by Spartak Gevorgian and published by Springer Science & Business Media. This book was released on 2013-02-14 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: To handle many standards and ever increasing bandwidth requirements, large number of filters and switches are used in transceivers of modern wireless communications systems. It makes the cost, performance, form factor, and power consumption of these systems, including cellular phones, critical issues. At present, the fixed frequency filter banks based on Film Bulk Acoustic Resonators (FBAR) are regarded as one of the most promising technologies to address performance -form factor-cost issues. Even though the FBARs improve the overall performances the complexity of these systems remains high. Attempts are being made to exclude some of the filters by bringing the digital signal processing (including channel selection) as close to the antennas as possible. However handling the increased interference levels is unrealistic for low-cost battery operated radios. Replacing fixed frequency filter banks by one tuneable filter is the most desired and widely considered scenario. As an example, development of the software based cognitive radios is largely hindered by the lack of adequate agile components, first of all tuneable filters. In this sense the electrically switchable and tuneable FBARs are the most promising components to address the complex cost-performance issues in agile microwave transceivers, smart wireless sensor networks etc. Tuneable Film Bulk Acoustic Wave Resonators discusses FBAR need, physics, designs, modelling, fabrication and applications. Tuning of the resonant frequency of the FBARs is considered. Switchable and tuneable FBARs based on electric field induced piezoelectric effect in paraelectric phase ferroelectrics are covered. The resonance of these resonators may be electrically switched on and off and tuned without hysteresis. The book is aimed at microwave and sensor specialists in the industry and graduate students. Readers will learn about principles of operation and possibilities of the switchable and tuneable FBARs, and will be given general guidelines for designing, fabrication and applications of these devices.
Download or read book In liquid Bulk Acoustic Wave Resonators for Biosensing Applications written by Girish Rughoobur and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Issues in Applied Physics 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 6150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Applied Physics / 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Applied Physics. The editors have built Issues in Applied Physics: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Applied Physics in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Applied Physics: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Acoustic Wave and Electromechanical Resonators written by Humberto Campanella and published by Artech House. This book was released on 2010 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This groundbreaking book provides you with a comprehensive understanding of FBAR (thin-film bulk acoustic wave resonator), MEMS (microelectomechanical system), and NEMS (nanoelectromechanical system) resonators. For the first time anywhere, you find extensive coverage of these devices at both the technology and application levels. This practical reference offers you guidance in design, fabrication, and characterization of FBARs, MEMS and NEBS. It discusses the integration of these devices with standard CMOS (complementary-metal-oxide-semiconductor) technologies, and their application to sensing and RF systems. Moreover, this one-stop resource looks at the main characteristics, differences, and limitations of FBAR, MEMS, and NEMS devices, helping you to choose the right approaches for your projects. Over 280 illustrations and more than 130 equations support key topics throughout the book.
Download or read book Documents concernant le film Quand l agneau se f che 1918 written by and published by . This book was released on with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biosensors written by Pier Andrea Serra and published by BoD – Books on Demand. This book was released on 2011-07-18 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: A biosensor is a detecting device that combines a transducer with a biologically sensitive and selective component. Biosensors can measure compounds present in the environment, chemical processes, food and human body at low cost if compared with traditional analytical techniques. This book covers a wide range of aspects and issues related to biosensor technology, bringing together researchers from 19 different countries. The book consists of 27 chapters written by 106 authors and divided in three sections: Biosensors Technology and Materials, Biosensors for Health and Biosensors for Environment and Biosecurity.
Download or read book Design Modeling and Fabrication of Shear Mode Bulk Acoustic Wave Sensor as a Potential Biosensor written by Chi-Jung Cheng and published by . This book was released on 2012 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been an increasing interest in development of thin film bulk acoustic wave resonator devices for chemical and biological sensing applications in the environmental and biomedical industries. The zinc oxide thin film FBAR devices provide attractive advantages, such as high resonant frequency, small size, and rapid response. Typically, the ZnO-based FBAR devices are operated in the longitudinal wave mode where the ZnO crystallites are perpendicular to the substrate. However, the longitudinal wave mode is adversely affected when used in liquid environments. To overcome this limitation, the shear mode solidly mounted film bulk acoustic wave resonator device is presented in this dissertation.
Download or read book Biosensors and Cancer written by Victor R. Preedy and published by CRC Press. This book was released on 2012-07-27 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the importance and application of biosensors is complicated by the diverse range of methods and applications. Furthermore, existing texts are somewhat technical in nature, making it difficult for the novice. This book disseminates information on biosensors in a readable way, suitable to a wide audience with varying levels of experience. Topics include optical imaging, surface plasmon resonance, microcantilevers, electrochemistry, aptamers, fluorescence, electrochemistry, nanobiosensors, and nanowires.
Download or read book Multilayer Integrated Film Bulk Acoustic Resonators written by Springer and published by . This book was released on 2012-08-29 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical and Biochemical Applications written by Pierre Laszlo and published by Elsevier. This book was released on 2012-12-02 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: NMR of Newly Accessible Nuclei, Volume 1: Chemical and Biochemical Applications is a 10-chapter text that explores the properties, advantages, developments, and chemical and biochemical applications of NMR technique. This book describes first the operation of an NMR spectrometer under its two aspects, namely, the instrumental and the computational aspects. The next chapters are devoted to some of the most important pulse sequences. The discussion then shifts to the various factors determining the position of the observed absorption and those responsible for the various relaxation processes. The last chapters deal with the specific applications of NMR, including in cation salvation, calcium-binding proteins, polyelectrolyte systems, halogens, and antibiotic ionophores. This book is of value to inorganic and analytical chemists, and biophysicists.
Download or read book Microelectromechanical Systems and Devices written by Nazmul Islam and published by BoD – Books on Demand. This book was released on 2012-03-28 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advances of microelectromechanical systems (MEMS) and devices have been instrumental in the demonstration of new devices and applications, and even in the creation of new fields of research and development: bioMEMS, actuators, microfluidic devices, RF and optical MEMS. Experience indicates a need for MEMS book covering these materials as well as the most important process steps in bulk micro-machining and modeling. We are very pleased to present this book that contains 18 chapters, written by the experts in the field of MEMS. These chapters are groups into four broad sections of BioMEMS Devices, MEMS characterization and micromachining, RF and Optical MEMS, and MEMS based Actuators. The book starts with the emerging field of bioMEMS, including MEMS coil for retinal prostheses, DNA extraction by micro/bio-fluidics devices and acoustic biosensors. MEMS characterization, micromachining, macromodels, RF and Optical MEMS switches are discussed in next sections. The book concludes with the emphasis on MEMS based actuators.
Download or read book Multilayer Integrated Film Bulk Acoustic Resonators written by Yafei Zhang and published by . This book was released on 2013 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin film Bulk Acoustic Resonators on Integrated Circuits for Physical Sensing Applications written by Matthew Leigh Johnston and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The fabrication of 0.8-1.5 GHz FBAR devices is validated for both off-chip and on-chip devices, and the integrated system is characterized for sensitivity and limit of detection. On-chip, parallel measurement of multiple sensors in real time is demonstrated for a quantitative vapor sensing application, and the limit of detection is below 50 ppm. This sensor platform could be used for a broad scope of label-free detection applications in chemistry, biology, and medicine, and it demonstrates potential for enabling a low-cost, point of use instrument.
Download or read book Handbook of Cell Biosensors written by Gérald Thouand and published by Springer. This book was released on 2021-10-01 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is an interdisciplinary and comprehensive reference covering all aspects of cell biosensors. It is divided into four main sections which are led and organized by numerous international experts. The scope of coverage includes: Fundamentals and genetics for biosensor applications Transducers, Materials and Systems Markets, innovation and education Application of biosensors in business Biosensor research is an exciting hybrid world where biologists, chemists, physicists, engineers and computer engineers come together. This handbook will serve as an invaluable living resource for all researchers in academia and industry working with cell biosensors.
Download or read book High Frequency Thin film Bulk Acoustic Wave Resonators for Gas and Bio analytical Applications written by G. M. Ashley and published by . This book was released on 2005 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
