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Book Electronic Optical and Mechanical Characterization of Zero and One Dimensional Nanostructures

Download or read book Electronic Optical and Mechanical Characterization of Zero and One Dimensional Nanostructures written by Chi-Nung Ni and published by . This book was released on 2008 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low dimensional nanostructures have drawn tremendous interest owing to their remarkable electrical, optical, and mechanical properties, which can be used for novel electronics, energy approaches, and size/power efficient applications. Examples include quantized electrical conduction in single molecules (zero-dimension)/ semiconducting nanotubes (one-dimension). Additionally, nanotubes have been shown to have high mechanical stiffness/resilience, anisotropic optical absorption due to their one-dimensional morphology. Such aspects were investigated in detail in this thesis. In Chapter 1, a brief introduction to molecular electronics and the properties of single molecules such as Mn12 Acetate, and linear structures such as carbon nanotubes and their applications are addressed. The quantized electrical transport behavior and its optical dependence, of Mn12 Acetate have been studied through novel electro-migration assisted nano-junctions in Chapter 2. In Chapter 3, a comprehensive study of the synthesis of carbon nanotubes (CNTs) using thermal chemical vapor deposition (TCVD) is presented. The characterization in terms of nanotube length and quality were compared, as a function of synthesis temperature, gas mixture, types of substrate, etc., and a growth mechanism was then determined. An improved synthesis procedure was successfully proposed based on the study. In Chapter 4, the electrical transport behavior of SWCNTs, functionalized with different molecules (e.g., dodecyl, phenyl groups), were compared and investigated. The doping effects from those covalently bonded functional groups were manifested in the change in transport properties (e.g., p-, n-type, or metallic). The flexural rigidities (EIs) of MWCNT bundles were investigated through optical methods including laser transmission measurement and imaging techniques, in Chapter 5. The deflections of CNT bundles under fluid flow were monitored in situ and the flexural rigidities derived from the measured deflection through modified Stokes-Oseen formalisms. The potential of a CNT based gas flow sensor was demonstrated. In Chapter 6, the anisotropic optical absorption properties of MWCNTs were investigated and the absorption cross-sections, considering the misalignment of nanotube mats, were calculated and compared to those from SWCNTs. The nanotube diameter dependence of the optical absorption anisotropy was also studied. Chapter 7 summarizes the thesis.

Book Electrochemical Nanotechnology

Download or read book Electrochemical Nanotechnology written by Wolfgang J. Lorenz and published by John Wiley & Sons. This book was released on 2008-07-11 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new window to local studies of interface phenomena at solid state surfaces has been opened by the development of local probe techniques such as Scanning Tunneling Microscopy (STM) or Atomic Force Microscopy (AFM) and related methods during the past fifteen years. The in-situ application of local probe methods in different systems belongs to modern nanotechnology and has two aspects: an analytical aspect and a preparative aspect. The first aspect covers the application of the local probe methods to characterize thermodynamic, structural and dynamic properties of solid state surfaces and interfaces and to investigate local surface reactions. Two methods which are still in the beginning of their development represent the second aspect: tip and cantilever. They can be used to form defined nano-objects such as molecular or atomic clusters, quantum dots etc. as well as to structure or modify solid state surfaces in the nanometer range. This IUPAC monograph is a comprehensive treatment of both aspects and presents the current state of knowledge. It is written for scientists active in the area of nanotechnology.

Book Transmission Electron Microscopy Characterization of Nanomaterials

Download or read book Transmission Electron Microscopy Characterization of Nanomaterials written by Challa S.S.R. Kumar and published by Springer Science & Business Media. This book was released on 2013-12-09 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: Third volume of a 40volume series on nanoscience and nanotechnology, edited by the renowned scientist Challa S.S.R. Kumar. This handbook gives a comprehensive overview about Transmission electron microscopy characterization of nanomaterials. Modern applications and state-of-the-art techniques are covered and make this volume an essential reading for research scientists in academia and industry.

Book One Dimensional nanostructures

Download or read book One Dimensional nanostructures written by Zhenyu Li and published by Springer Science & Business Media. This book was released on 2013-03-21 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: One-Dimensional Nanostructures: Electrospinning Technique and Unique Nanofibers is a comprehensive book depicting the electrospinning technique and related 1D unique electrospun nanofibers. The first part of the book focuses on electrospinning technique, with chapters describing Electrospinning setup, electrospinning theories, and related working parameter. The second part of the book describes in detail specific topics on how to control the electrospun fiber properties such as how to control the fiber direction, how to control the fiber surface morphology, how to control the fiber structure, and how to construct 3D structures by electrospun fibers. The final part of the book depicts the applications of the electrospun nanofibers, with sections describing in detail specific fields such as electrospun nanofiber reinforcement, filtration, electronic devices, lithium-ion batteries, fuel cells, biomedical field, and so on. One-Dimensional Nanostructures: Electrospinning Technique and Unique Nanofibers is designed to bring state-of-the-art on electrospinning together into a single book and will be valuable resource for scientists in the electrospinning field and other scientists involved in biomedical field, mechanical field, materials, and energy field. Dr. Zhenyu Li is an associate professor at the Dept. of Chemistry, Jilin University, Changchun, P. R. China. Currently, he also holds the position in Australian Future Fibres Research & Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, Victoria, Australia. Dr. Ce Wang is a professor at the Dept. of Chemistry, Jilin University, Changchun, P. R. China.

Book Materials Preparation and Characterization in Thermoelectrics

Download or read book Materials Preparation and Characterization in Thermoelectrics written by David Michael Rowe and published by CRC Press. This book was released on 2017-12-19 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes updated theoretical considerations which provide an insight into avenues of research most likely to result in further improvements in material performance. It details the latest techniques for the preparation of thermoelectric materials employed in energy harvesting, together with advances in the thermoelectric characterisation of nanoscale material. The book reviews the use of neutron beams to investigate phonons, whose behaviour govern the lattice thermal conductivity and includes a chapter on patents.

Book Thermal Electrical and Electrochemical Characterizations of Advanced Nanomaterials for Energy Conversion and Storage Applications

Download or read book Thermal Electrical and Electrochemical Characterizations of Advanced Nanomaterials for Energy Conversion and Storage Applications written by Sajad Yazdani and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Additive Manufacturing and in Situ Mechanical and Material Characterization of Metallic Structures at Micro nanoscale

Download or read book Additive Manufacturing and in Situ Mechanical and Material Characterization of Metallic Structures at Micro nanoscale written by Seyed Soheil Daryadel and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress in microscale additive manufacturing (μ-AM) of metals requires engineering of the microstructure for various functional applications. In situ control over the microstructure during three-dimensional (3D) printing is critical to achieve metallic nanostructures with desired properties and eliminate the need for post-processing. In this dissertation, an ambient environment localized pulsed electrodeposition (L-PED) process for direct printing of 3D free-standing and layer-by-layer nanotwinned (nt) metals is introduced. 3D nt-Cu structures were additively manufactured using pulsed electrodeposition at the tip of an electrolyte containing nozzle. For the first time, the control of the microstructure of metals during 3D-printing is reported. In particular, It is shown that through variation of electrochemical process parameters the density and the orientation of the coherent twin boundaries (CTBs), as well as the grain size can be controlled. Ntmetals offer superior mechanical (high ductility and strength) and electrical properties (low electromigration) compared to their nanocrystalline (nc) counterparts. While these properties are advantageous for applications in nanoscale devices, the fabrication of nt-metals has been limited to 2D films or template-based 1D geometries. The focused ion beam (FIB) and transmission electron microscopy (TEM) analysis showed that the printed metal was fully dense, mostly devoid of impurities and microstructural defects, and confirmed the formation of CTBs. Mechanical properties of the 3D printed nt-Cu were characterized by in situ SEM micro-compression experiments. The 3D printed nt-Cu exhibited average flow stress of 960 MPa, which is remarkable for a 3D printed material. The microstructure and mechanical properties of the nt-Cu was compared to nc-Cu printed using the same process under direct current (DC) voltage. The results show that such control over microstructure directly correlates with the mechanical properties of the printed metal. L-PED is introduced as an approach to enable direct deposition of nano-pillars and micro-pillars of metals and alloys. When combined with in situ nanomechanics instrumentation, this approach may enable high-throughput investigation of the process–microstructure–property relationship, in particular for nanocrystalline and nano-twinned metals. The application for 3D printed electronics will be greatly extended when they can be used in extreme environments and especially at elevated temperatures. Therefore, the thermal stability and reliability of the additively manufactured nt-Cu interconnects is investigated. The results show clear correlation between the microstructure and the thermal stability of the printed metal. The microstructures with columnar shaped grains and high density of low-energy CTBs exhibited better thermal stability compared to the ones with high-angle random-oriented grain boundaries. Despite the evolution of microstructure and growth of the grains, printed materials with high density of TBs exhibited high strength of 522 MPa after annealing for 4 hours at 300 °C. Additionally, LED is extended to a larger scale process for patterning of high quality metallic patterns on flexible and nonconductive substrates. The printed metallic patterns are solid with no porosity and impurities, and exhibit high electrical conductivity. Overall, the results indicate the feasibility of using LED 3D-printed high conductivity nt-metal features in a wide range of applications, particularly for the electronics and the next generation integrated circuits.

Book Electrochemical Synthesis of One dimensional Nanostructures for Sensor and Spintronic Applications

Download or read book Electrochemical Synthesis of One dimensional Nanostructures for Sensor and Spintronic Applications written by Carlos Maldonado Hangarter and published by . This book was released on 2009 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: One-dimensional (1-D) nanostructures, such as nanowires and nanotubes, are attractive building blocks for electronics because of their small sizes, which provide for extremely high density devices, and their unique properties that emerge from their diminutive sizes and increased surface to volume ratios. In addition their extremely high aspect ratios offer researchers the potential to build striped and coaxial structures with different components aligned along the cylindrical or radial axis of the wire, respectively. Composition modulation can be used to incorporate multiple functionalities from intrinsic properties of the material or through interfacial phenomena. However, spatial manipulation and the ability to assemble and position nanostructures in a controlled manner so they are registered to lithographically defined contacts is a critical step toward scalable integration in high-density nanodevices. In this dissertation a generalized template directed approach with ancillary assembly, contact, and displacement techniques were utilized to synthesize and characterize individual nanostructures from uniquely configured conducting polymer, magnetic, and semiconductor nanomaterials for sensor and spintronic applications.

Book Nanoscale One Dimensional Electronic and Photonic Devices 3 NODEPD 3

Download or read book Nanoscale One Dimensional Electronic and Photonic Devices 3 NODEPD 3 written by L. J. Chou and published by The Electrochemical Society. This book was released on 2009-09 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers included in this issue of ECS Transactions were originally presented in the symposium ¿One-Dimensional Nanoscale Electronic and Photonic Devices 3¿, held during the 216th meeting of The Electrochemical Society, in Vienna, Austria from October 4 to 9, 2009.

Book Materials Behavior

    Materials Behavior

    Book Details:
  • Author : Mihai Ciocoiu
  • Publisher : CRC Press
  • Release : 2018-06-26
  • ISBN : 0429845332
  • Pages : 286 pages

Download or read book Materials Behavior written by Mihai Ciocoiu and published by CRC Press. This book was released on 2018-06-26 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of advanced materials has become extremely important in the last decade, being widely used in academic and industrial research. This book examines the potential of advanced materials as well as nanotechnology to improve fiber science from fibril to fabric mode, to create better materials and products for a variety of aspects. The book presents research advances in materials behavior using fractal analysis, mathematical modeling and simulation, and other methods. Examined are electrical, mechanical, optical, and magnetic properties; size; morphology; and chemical behavior of such materials as aerogels, polymer films, nanocomposite materials, natural composites, catalysis, and more with a view to their application in the medical, engineering, and textile fields. With chapters written by eminent scientists, the book offers valuable information for academics, researchers, and engineering professionals. Contributions range from new methods to novel applications of existing methods to help readers gain understanding of the material and/or structural behavior of new and advanced systems.

Book Index Medicus

Download or read book Index Medicus written by and published by . This book was released on 2003 with total page 2084 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.