Molecular and Nano Electronics: Analysis, Design and Simulation,17
The most eye-catching features of these Structures are their electronic, mechanical, optical and chemical characteristics, which open a way to future applications. These properties can even be measured on single Nanotubes. For commercial application, large quantities of purified Nanotubes are needed. CNTs have also proven to be good field emitters and single molecule transistors. The small dimensions, strength and the remarkable physical properties of these structures make them a very unique material with a whole range of promising applications.
This BOOK covers all relevant topics in MEMS and is design to cater to the needs of all branches of engineering students. Written in lucid style, this book assimilates the best practice of pedagogy, dealing at length with various topics such MEMS, MEMS Applications and its importance in Engineering Community. Sailent Features: 1. Introduction to MEMS 2. Introduction to Fabrication Technology 3. Introduction to Comsol 4. Introduction to Capacitors 5. Tunable MEMS Capacitor 6. Design Procedure 7. Simulation of tunable capacitor in Micro scale
Molecular Characterization and Analysis of Polymers,53
This book is focused on the thermophysical properties of complex liquids (dusty plasmas) using novel molecular dynamics simulation (MDS) methods, and will disclose the exact nature and origin of the deep understanding exist in different modes of complex liquids. New MDS methods for investigating transport properties in microelectronic (thermoelectronic and photoelectronic) devices are required for improving device design and for understanding device physics. Such methods are also required for studying new transport phenomena in nanoscale devices made of novel nanostructures, such as carbon electronics or semiconductor nanowires, nanometer size sensors to detect proteins or single DNA and nanolevel fluidic flow, nanopodwer production, nanocrystalline solar cells and polymer coatings with embedded nano particles. Plasma thermal conductivity, heat process and their nonlinear effects (non-Newtonian behaviors) are the basic data of transport property of complex liquids, and are applied for studying their flow,and heat and mass transfer characteristics. We have discussed the thermal conductivity of complex (dusty) plasmas that is an important parameter using in the heat designing system.
The result of the analysis of morphological, isozyme, RAPD and other PCR based molecular marker have been report to survey the genetic diversity among bread wheat germplasm collected from various geographical regions. Transmission of wheat to Asia through three routes was traced out by the analysis of Asian wheat landraces with isozyme and RAPD, and it was suggested that Asian wheat could be divided into at least three lineage. Quality related genes of wheat is genetically and geographically differentiated, alleles (HMW, LMW, puroindoline and waxy ) are geographically distributed. Some unique alleles are found in this study could be utilized to improve the quality of wheat proteins.
Dimension makes the difference between Microelectronics and Electronics. Can dimension play a similar role in fluid dynamics, chemistry or biology? This is the major question arising in microfluidics. This work aims at investigating some peculiar property of fluid streams at the micro scale. The results of a new designed device, gaining experience from recent literature, are promising in terms of diffusion and reaction.
This work involves the development and completion of a study on High Performance Computing (HPC) system simulation and modeling. On this journey I was carried into studies on HPC system operations, performance benchmarking routines,HPC system job distributions, queuing theories, job scheduling techniques, systems design concepts, and methods for modeling, testing and simulating HPC systems.
Classical electronics exploits the electron charge to designate binary information, whereas spintronics is an emerging field in which the spin of the electron is used for switching purposes and to communicate information. Spin-dependent effects may arise from interactions of the electron with an external magnetic field or with magnetic properties of the conduction material. Our work considers solid-state Quantum Dots (QD''s) in an Aharonov-Bohm (AB) ring interferometer, with externally applied magnetic fields. Computational analysis of the spin-polarized electron transport through the device illustrates the principles and promise of such devices in spintronics. Device applications of an AB-ring interferometer with externally controlled QD''s include spin-polarizers and spin-filters, used to generate and select electric currents consisting primarily of a single spin state, and for use as sensors in hard drives or spin-based circuit elements. The detailed background descriptions of the AB and Zeeman effects and their computational analysis in nano-electronic circuits will be very helpful to researchers initiating investigations into this cutting-edge field.
The present research work published in this book is mainly to increase the worldwide production of wheat to meet the demand of human beings.As the world is facing many environmental effects i.e. abiotic stresses mainly drought, heat etc. which directly lead to the downfall in the production of cereal crops, pulses, vegetables, fruits etc..So the scientists need to develop new varieties which can show maximum production on yield and quality basis in abiotic stress conditions by using Biotechnological tools and techniques. In the present research work small contribution was made to overcome the problem of abiotic stresses on agriculture.
This book presents a synthesis of various results about heat transfer of power semiconductor devices and electrical apparatus, and includes topics on thermal analysis of toroidal transformers and fast fuses used to protect power semiconductor devices, heat transfer of high breaking capacity fuses, busbars, current paths from power circuit breakers and thermal analysis of sliding contacts. Some mathematical models to study the heat transfer of busbars during transient conditions and sliding contacts with double contact points, are proposed. Starting from the fact that at high speeds of electric traction vehicles, the pantograph-catenary’s system has separation areas and electric arc appears, the possibility of power transfer from the line contact to the main electric motor through the sliding arc column, has been investigated. The book as a whole gives a comprehensive treatment of thermal modelling and numerical simulations of power semiconductor devices and assemblies, electrical equipment, and applies alike to researchers, experts, engineers, university specialists and students which study theory, design or operate with power electronic devices and electrical apparatus.
Atomistic simulations based on Molecular Dynamics were used to model the lattice distortions in metallic nano-polycrystalline microstructures. Complex microstructures were generated with a new modified Voronoi tessellation method which provides a direct relation between generation parameters and statistical properties of the resulting model. Line Profile Analysis (LPA) was employed to retrieve the microstructure information from the powder diffraction patterns. The study provided a new point of view on the role of the grain boundary regions in nano-polycrystalline aggregates, exploring the interference effects between different domains and between grain boundary and crystalline regions. Usual concepts of solid mechanics were brought in the atomistic models to describe the strain effects on the powder diffraction pattern. The new concept of Directional Pair Distribution Function (D-PDF) was developed. D-PDFs provide a representation of the strain field which is directly comparable with the results of LPA. The D-PDF opens a new chapter in powder diffraction as new insights and a more sound interpretation of the results are made possible with this new approach to diffraction LPA.
Cyanobacterial blooms are potential health hazards in water supply reservoirs. Cyanobacteria are indicators of increasing eutrophication of water sources. Toxic bloom forming Cyanobacteria produce cyanotoxins, which can be hepatotoxic, neurotoxic, dermatotoxic or cytotoxic in nature. Many factors trigger bloom formation, severely affecting the aquatic flora and fauna and also posing health risks to animals and humans, who consume the water. Detecting toxicity in Cyanobacteria is a challenging tasks as Conventional methods are not suitable. Molecular investigation of toxicity seems to be a promising option. This book describes the features of bloom forming cyanobacteria- nature of cyanobacteria, factors affecting bloom formation, adverse effects of blooms, cyanotoxins and their impact, genes imparting toxicity and the role of metals on the metabolism and physiology.
In order to improve the performance of molecular electronics and catalysts, it is important to understand the electronic structures of adsorbed molecules or clusters on surfaces. The work presented in this book focuses on the characterization of the electronic properties and their relationship with geometric structures. One system has been studied is adsorbed phenyl diisocyanide molecules on a metal surface. On the surface, the molecules form one-dimensional molecular chain structures which are composed of alternating diisocyanide molecule and Au adatom in a unit cell. The formation of chain structures induces novel interfacial electronic properties. Combined with their considerable length and tunabilities, the self-assembled molecular diisocyanide structures may find application as molecular conductors in nanoelectronics. The other system is size-selected MoxSy clusters deposited on an ultrathin alumina film. The local work function of the surface increases with increasing cluster coverage as a result of electron tunneling from the substrate to the MoxSy clusters. These results suggest a novel way to modify the electronic structure and reactivity of heterogeneous catalysts.