Design of Indium Arsenide Nanowire Sensors for PH and Biological Sensing and Low Temperature Transport Through P-doped Indium Arsenide Nanowires PDF Download
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Languages : en
Pages : 152
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Languages : en
Pages : 152
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Author: Morten Hannibal Madsen
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Languages : en
Pages : 120
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Languages : en
Pages : 412
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Author: Marion Jeanne Leonella Sourribes
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Languages : en
Pages : 0
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Author: Maria E. Pace
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Category :
Languages : en
Pages : 89
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Abstract Silicon Nanowires for Chemical Sensing, pH Measurement and Ion Species Identification in Solution by Maria E. Pace Doctor of Philosophy in Applied Science and Technology University of California, Berkeley Professor Tarek I. Zohdi, Co-Chair Dean Albert P. Pisano, Co-Chair In situ measurement of true pH would be useful in many applications. True pH is the negative log of the Hydrogen ion concentration, however, measurement of this is elusive in many practical applications due to the presence of interfering ions, such as sodium and potassium. Monitoring true pH in surgical procedures, for instance, would be very useful, however, interfering ions necessitate preprocessing of the blood and laboratory analysis making it not in situ, and not in real time. This work presents a measurement system capable of measuring true pH in the presence of interfering ions using nanowire sensors and electrospectroscopy. This system is also able to operate as a chemical sensor by discriminating between different ionic species in solution and can separately measure concentrations of other ionic species for leak detection and chemical identification. Nanowire sensors offer many advantages such as small size, low power, and inexpensive fabrication. These advantages allow real time, in situ monitoring in many applications. In addition, silicon nanowires are integrated as a semiconductor pH sensor and species identification chip. Using electrospectroscopy, ions drift in the fluid at different times allowing the nanowire to make measurements of different species present in the fluid. To accomplish this, various modes of operation including “the time of flight” have been developed to maximize ion identification and species concentration measurement. The advantages of these sensors include high sensitivity at low concentrations, 80% sensitivity at 1e-6 M with ion species identification and measurement of true pH. Depending on the species of interest, a particular mode of operation can be employed to achieve desirable results. Advantages of these modes of operation are isolation of hydrogen ions from other species including sodium to measure true pH in real time and a method for deconvolving the species both in temporal and spatial maps. Additionally, a method for electrically cleaning the nanowires sensors and a method to re-zero the nanowires has been explored allowing more accurate measurement of the species and true pH. A novel top down fabrication process has been developed which reduces the line edge roughness of the nanowire for more reproducible sensors, reduces dielectric pin hole density for minimal sensor drift over time and reduces parasitic resistance for higher ion sensitivity. This novel fabrication process is truly CMOS compatible allowing more compatibility with other electronics. The SiNW is covered by thin film which protects SiNW from liquid penetration and can also work as ion sensitive film or functionalized surface. As a fabrication simplicity, the entire structure above can be built on a standard SOI (Silicon on Insulator) wafer. Experimental results have shown a linear relation between resistance change in the nanowire and pH in the fluid.
Author: Kourosh Kalantar-zadeh
Publisher: Springer Science & Business Media
ISBN: 0387680233
Category : Technology & Engineering
Languages : en
Pages : 502
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Nanotechnology provides tools for creating functional materials, devices, and systems by controlling materials at the atomic and molecular scales and making use of novel properties and phenomena. Nanotechnology-enabled sensors find applications in several fields such as health and safety, medicine, process control and diagnostics. This book provides the reader with information on how nanotechnology enabled sensors are currently being used and how they will be used in the future in such diverse fields as communications, building and facilities, medicine, safety, and security, including both homeland defense and military operations.
Author: Kilian Flöhr
Publisher:
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Category :
Languages : en
Pages :
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Author: J Arbiol
Publisher: Elsevier
ISBN: 1782422633
Category : Technology & Engineering
Languages : en
Pages : 573
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Semiconductor nanowires promise to provide the building blocks for a new generation of nanoscale electronic and optoelectronic devices. Semiconductor Nanowires: Materials, Synthesis, Characterization and Applications covers advanced materials for nanowires, the growth and synthesis of semiconductor nanowires—including methods such as solution growth, MOVPE, MBE, and self-organization. Characterizing the properties of semiconductor nanowires is covered in chapters describing studies using TEM, SPM, and Raman scattering. Applications of semiconductor nanowires are discussed in chapters focusing on solar cells, battery electrodes, sensors, optoelectronics and biology. - Explores a selection of advanced materials for semiconductor nanowires - Outlines key techniques for the property assessment and characterization of semiconductor nanowires - Covers a broad range of applications across a number of fields
Author: Bansi D. Malhotra
Publisher: William Andrew
ISBN: 0128135158
Category : Technology & Engineering
Languages : en
Pages : 334
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Nanomaterials for Biosensors: Fundamentals and Applications provides a detailed summary of the main nanomaterials used in biosensing and their application. It covers recent developments in nanomaterials for the fabrication of biosensor devices for healthcare diagnostics, food freshness and bioprocessing. The various processes used for synthesis and characterization of nanostructured materials are examined, along with the design and fabrication of bioelectronic devices using nanostructured materials as building blocks. Users will find the fundamentals of the main nanomaterials used in biosensing, helping them visualize a systematic and coherent picture of how nanomaterials are used in biosensors. The book also addresses the role of bio-conjugation of nanomaterials in the construction of nano-biointerfaces for application in biosensors. Such applications, including metal nanoparticles, metal oxide nanoparticles, nanocomposites, carbon nanotubes, conducting polymers and plasmonic nanostructures in biosensing are discussed relative to each nanomaterial concerned. Finally, recent advancements in protein functionalized nanomaterials for cancer diagnostics and bio-imaging are also included. - Provides a detailed study on how nanomaterials are used to enhance sensing capabilities in biosensors - Explains the properties, characterization methods and preparation techniques of the nanomaterials used in biosensing - Arranged in a material-by-material way, making it clear how each nanomaterial should be used
Author: M. Aldissi
Publisher: Springer Science & Business Media
ISBN: 9401719527
Category : Technology & Engineering
Languages : en
Pages : 233
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This book contains the majority of the papers presented at the NATO Ad vanced Research Workshop (ARW) held in Burlington, Vermont, USA on October 12-15, 1992. This ARW was the first of its kind to address the subject of intrinsically conducting polymers with an emphasis on processing and technological applications. The NATO ARW format was followed in that the subjects addressed here were limited in number but discussed in detail with the attendance being limited to a small number of selected scientists. The ARW brought together lecturers who are leaders in their respective fields from a wide range of NATO and non-NATO countries (a total of 11 countries) with the support of the NATO Scientific Affairs Division and some support from Champlain Cable Corporation. The total number of par ticipants was 33 and the number of presentations was 24. The speakers were chosen based on the topics selected for this workshop and repre sented industry, universities and government laboratories. The field of conducting polymers has grown rapidly during the past few years with important developments in materials processing and fabrica tion that brought about active research programs focusing on the use of these polymers as "smart" materials in technological applications and devices in academic and industrial research laboratories.
