Silicon Nanowire Field Effect Chemical Sensor

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Silicon Nanowire Field Effect Chemical Sensor

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Author : Songyue Chen
language : en
Publisher:
Release Date : 2011

Silicon Nanowire Field Effect Chemical Sensor written by Songyue Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

Nanowire Field Effect Transistors Principles And Applications

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Author : Dae Mann Kim
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-10-23

Nanowire Field Effect Transistors Principles And Applications written by Dae Mann Kim and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-23 with Technology & Engineering categories.

“Nanowire Field Effect Transistor: Basic Principles and Applications” places an emphasis on the application aspects of nanowire field effect transistors (NWFET). Device physics and electronics are discussed in a compact manner, together with the p-n junction diode and MOSFET, the former as an essential element in NWFET and the latter as a general background of the FET. During this discussion, the photo-diode, solar cell, LED, LD, DRAM, flash EEPROM and sensors are highlighted to pave the way for similar applications of NWFET. Modeling is discussed in close analogy and comparison with MOSFETs. Contributors focus on processing, electrostatic discharge (ESD) and application of NWFET. This includes coverage of solar and memory cells, biological and chemical sensors, displays and atomic scale light emitting diodes. Appropriate for scientists and engineers interested in acquiring a working knowledge of NWFET as well as graduate students specializing in this subject.

Chemical And Biochemical Sensors Based On Silicon Nanowire Field Effect Transistor Arrays

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Author : Mathias Wipf
language : en
Publisher:
Release Date : 2014

Chemical And Biochemical Sensors Based On Silicon Nanowire Field Effect Transistor Arrays written by Mathias Wipf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Study Of Silicon Nanowire Field Effect Transistor For Analog And Digital Biosensing

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Author : Pengyuan Zang
language : en
Publisher:
Release Date : 2017

Study Of Silicon Nanowire Field Effect Transistor For Analog And Digital Biosensing written by Pengyuan Zang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Biosensors categories.

The advancement of semiconductor technology has popularized the low power, economical and small form-factor solid state devices, such as those highly integrated and interconnected as the fundamental infrastructure for the internet of things (IoT). Due to its CMOS-compatibility and electrical interface, the biosensor utilizing field effect transistor (FET) as transducer has become the perfect candidate to interface directly with the chemical and biological properties of the physical world. Especially, nanowire (NW) FET biosensor has received great attention as a highly sensitive biosensing platform, benefiting from its increased surface-to-volume ratio. In this work, several challenges and key aspects of existing NW FET biosensor were studied, and solutions were proposed to address these problems. For example, the hydrolytic stability of the surface sensing element was evaluated and improved by a hydrolysis process, which led to a significant increase in the overall biosensor performance. Another challenge is the noise in the electric potential of the sensing solutions. A secondary reference electrode was introduced in the biosensing system, and its potential was used to subtract the noise from the measured sensor output. Compared to a reference FET, this approach greatly reduced the system complexity and requirement, yet still improved the limit of detection (LOD) by 50 – 70%. This work also involved careful investigation into the analyte sensitivity, which can be considerably affected by the charge buffering effect from the surface hydroxyl groups. Analytical studies and numerical simulations were carried out, revealing that both low pH sensitivity and large analyte buffer capacity are required to achieve a reasonable analyte sensitivity. The most significant portion of this work was the experimental demonstration of the digital biosensing concept with single serpentine NW FET biosensor. The majority of existing FET biosensors utilized the device as an analog transducer, which measures the captured analyte density to generate an output, and suffers from various noise factors, especially the nonspecific changes of the sensing solutions than cannot be reduced by averaging. Digital biosensor no longer depends on the amplitude of the sensor output and is therefore better immune from these noise factors. Instead, the individual binding event of single analyte is counted and analyzed statistically to determine the analyte concentration. The single serpentine NW FET is the ideal device design to achieve digital biosensing. It maintains the low noise level with the equivalently long channel, yet achieves a small footprint enough for binding of only a single analyte. The binding of analyte to multiple segments of the NW results in both higher sensitivity and binding avidity. The small footprint also enables high integration density of the individual digital biosensors into an array format, which is a responsive, highly sensitive, and cost-effective future biosensing platform.

Vertical Silicon Nanowire Arrays For Gas Sensing

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Author : Hangbo Zhao
language : en
Publisher:
Release Date : 2014

Vertical Silicon Nanowire Arrays For Gas Sensing written by Hangbo Zhao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

The goal of this research was to fabricate and characterize vertically aligned silicon nanowire gas sensors. Silicon nanowires are very attractive for gas sensing applications and vertically aligned silicon nanowires are preferred over horizontal nanowires for gas sensing due to the high density of nanowire arrays and the increased nanowire surface area per substrate area. However, the development of such devices has been limited by a number of challenges. Two of the key challenges in fabricating vertical silicon nanowire sensors are the difficulty of making electrical contact to the tops of the wires and the large serial resistance of the substrate. In this thesis, highly ordered, dense arrays of vertically aligned silicon nanowires in patterned areas have been fabricated utilizing metal assisted chemical etching (MACE) in combination with interference lithography. In addition, we report a novel and simple approach for making reliable top electrical contacts by using tilted electron beam evaporation with a custom-built rotation plate. A suspended metal top contact layer was formed on vertically aligned silicon nanowires using this approach. We have also systematically investigated the contact behavior between silicon nanowires and metal electrodes with different nanowire doping and contact materials. Ohmic contact was formed between the suspended top metal layer and the tips of silicon nanowires. We have also solved the serial resistance problem by using lightly doped epitaxial silicon films (needed for the sensors) on heavily doped substrates. Based on these techniques and design considerations, we have successfully fabricated vertically aligned silicon nanowire field effect gas sensors. Finally, we have demonstrated highly sensitive detection of hydrogen, oxygen, 10 ppm (parts-per-million, 10-6) ammonia and nitrogen dioxide gases using the fabricated sensor devices at room temperature. The sensors have exhibited the highest sensitivity per unit chip area for hydrogen, oxygen and 10 ppm NH3 gases at room temperature, among other vertically aligned silicon nanowire based gas sensors reported. Further improvements of the current sensor devices can be made to accelerate response and recovery of gas sensing.

Fabrication And Characterization Of Silicon Nanowire Field Effect Sensors

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Author : David Aaron Routenberg
language : en
Publisher:
Release Date : 2009

Fabrication And Characterization Of Silicon Nanowire Field Effect Sensors written by David Aaron Routenberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Silicon Nanowire Field Effect Transistor For Biosensing

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Author : Yu Chen
language : en
Publisher:
Release Date : 2009

Silicon Nanowire Field Effect Transistor For Biosensing written by Yu Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Abstract: Detection and recognition of chemical ions and biological molecules are important in basic science as well as in pharmacology and medicine. Nanotechnology has made it possible to greatly enhance detection sensitivity through the use of nanowires, nanotubes, nanocrystals, nanocantilevers, and quantum dots as sensing platforms. In this work silicon nanowires are used as the conductance channel between the source and drain of a FET (field effect transistor) device and the biomolecular binding on the surface of nanowire modifies the conductance like a change in gate voltage. Due to the high surface-to-volume ratio and unique character of the silicon nanowires, this device has significant advantages in real-time, label-free and highly sensitive detection of a wide range of species, including proteins, nucleic acids and other small molecules. Here we present a biosensor fabricated from CMOS (complementary metal-oxide-semiconductor) compatible top-down methods including electron beam lithography. This method enables scalable manufacturing of multiple sensor arrays with high efficiency. In a systematic study of the device characteristics with different wire widths, we have found the sensitivity of the device increases when wire width decreases. By operating the device in appropriate bias region, the sensitivity of the device can be improved without doping or high temperature annealing. Not only can this device be used to detect the concentration of proteins and metabolites like urea or glucose, but also dynamic information like the dissociation constant can be extracted from the measurement. The device is also used to detect the clinically related cancer antigen CA 15.3 and shows potential application in cancer studies.

Nanowire Field Effect Transistor Fet

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Author : Antonio García-Loureiro
language : en
Publisher:
Release Date : 2021

Nanowire Field Effect Transistor Fet written by Antonio García-Loureiro and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.

In the last few years, the leading semiconductor industries have introduced multi-gate non-planar transistors into their core business. These are being applied in memories and in logical integrated circuits to achieve better integration on the chip, increased performance, and reduced energy consumption. Intense research is underway to develop these devices further and to address their limitations, in order to continue transistor scaling while further improving performance. This Special Issue looks at recent developments in the field of nanowire field-effect transistors (NW-FETs), covering different aspects of the technology, physics, and modelling of these nanoscale devices.

Nanowires

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Author : Anqi Zhang
language : en
Publisher: Springer
Release Date : 2016-07-26

Nanowires written by Anqi Zhang and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-07-26 with Technology & Engineering categories.

This book provides a comprehensive summary of nanowire research in the past decade, from the nanowire synthesis, characterization, assembly, to the device applications. In particular, the developments of complex/modulated nanowire structures, the assembly of hierarchical nanowire arrays, and the applications in the fields of nanoelectronics, nanophotonics, quantum devices, nano-enabled energy, and nano-bio interfaces, are focused. Moreover, novel nanowire building blocks for the future/emerging nanoscience and nanotechnology are also discussed.Semiconducting nanowires represent one of the most interesting research directions in nanoscience and nanotechnology, with capabilities of realizing structural and functional complexity through rational design and synthesis. The exquisite control of chemical composition, morphology, structure, doping and assembly, as well as incorporation with other materials, offer a variety of nanoscale building blocks with unique properties.

Nanowire Sensor For Real Time Chemical And Biological Detection

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Author : Inkyu Park
language : en
Publisher:
Release Date : 2007

Nanowire Sensor For Real Time Chemical And Biological Detection written by Inkyu Park and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.