Download or read book Controlled Growth of Carbon Nanotube Architectures and Devices written by Nathan Robert Franklin and published by . This book was released on 2002 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Controlled Fabrication of Aligned Carbon Nanotube Architectures for Microelectronics Packaging Applications written by Lingbo Zhu and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is devoted to the fabrication of carbon nanotube structures for microelectronics packaging applications with an emphasis on fundamental studies of nanotube growth and assembly, wetting of nanotube structures, and nanotube-based composites. A CVD process is developed that allows controlled growth of a variety of CNT structures, such as CNT films, bundles, and stacks. Use of an Al2O3 support enhances the Fe catalyst activity by increasing the CNT growth rate by nearly two orders of magnitude under the same growth conditions. By introducing a trace amount of weak oxidants into the CVD chamber during CNT growth, aligned CNT ends can be opened and/or functionalized, depending on the selection of oxidants. By varying the growth temperature, CNT growth can be performed in a gas diffusion- or kinetics-controlled regime. To overcome the challenges that impede implementation of CNTs in circuitry, a CNT transfer process was proposed to assemble aligned CNT structures (films, stacks & bundles) at low temperature which ensures compatibility with current microelectronics fabrication sequences and technology. Field emission and electrical testing of the as-assembled CNT devices indicate good electrical contact between CNTs and solder and a very low contact resistance across CNT/solder interfaces. For attachment of CNTs and other applications (e.g. composites), wetting of nanotube structures was studied. Two model surfaces with two-tier scale roughness were fabricated by controlled growth of CNT arrays followed by coating with fluorocarbon layers formed by plasma polymerization to study roughness geometric effects on superhydrophobicity. Due to the hydrophobicity of nanotube structures, electrowetting was investigated to reduce the hydrophobicity of aligned CNTs by controllably reducing the interfacial tension between carbon nanotubes (CNTs) and liquids. Electrowetting can greatly reduce the contact angle of liquids on the surfaces of aligned CNT films. However, contact angle saturation still occurs.
Download or read book Perspective of Carbon Nanotubes written by Hosam El-Din Saleh and published by BoD – Books on Demand. This book was released on 2019-12-11 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes belong to new nanomaterials and have been known for almost 20 years, but their history is somewhat lengthier. They have been identified as promising candidates for various applications.High-temperature preparation techniques are conventional techniques for the synthesis of carbon nanotubes using arc discharge or laser ablation, but today these methods are being replaced by low-temperature vapor deposition techniques, since orientation, alignment, nanotube length, diameter, purity, and density of carbon nanotubes can be precisely controlled. The synthesis of carbon nanotubes by chemical vapor deposition on catalyst arrays leads to nanotube models grown from specific sites on surfaces. The controlled synthesis of nanotubes opens up interesting possibilities in nanoscience and nanotechnologies, including electrical, mechanical and electromechanical properties and devices, chemical functionalization, surface chemistry and photochemistry, molecular sensors, and interfacing with moderate biological systems.Carbon nanotubes are used in many applications due to their unique electrical, mechanical, optical, thermal, and other properties. Conductive and high-strength composite materials, energy saving and energy conversion devices, sensors, visualization of field emissions and sources of radiation, means for storing hydrogen, and nanoscale semiconductor devices, probes, and interconnections are some of the many applications of carbon nanotubes.
Download or read book Carbon Nanotubes written by Mildred S. Dresselhaus and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: After a short introduction and a brief review of the relation between carbon nanotubes, graphite and other forms of carbon, the synthesis techniques and growth mechanisms for carbon nanotubes are described. This is followed by reviews on nanotube electronic structure, electrical, optical, and mechanical properties, nanotube imaging and spectroscopy, and nanotube applications.
Download or read book Controlled Growth of Carbon Nanotubes for Electronic and Photovoltaic Applications written by Andrea Capasso and published by . This book was released on 2011 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Graphite Fibers and Filaments written by Mildred S. Dresselhaus and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was begun after three of the present authors gave a series of in vited talks on the subject of the structure and properties of carbon filaments. This was at a conference on the subject of optical obscuration, for which submicrometer diameter filaments with high length-to-diameter ratios have potential applications. The audience response to these talks illustrated the need of just one scientific community for a broader knowledge of the struc ture and properties of these interesting materials. Following the conference it was decided to expand the material presented in the conference proceedings. The aim was to include in a single volume a description of the physical properties of carbon fibers and filaments. The research papers on this topic are spread widely in the literature and are found in a broad assortment of physics, chemistry, materials science and engineering and polymer science journals and conference proceedings (some of which are obscure). Accordingly, our goal was to produce a book on the subject which would enable students and other researchers working in the field to gain an overview of the subject up to about 1987.
Download or read book The Chemistry of Nanostructured Materials written by Peidong Yang and published by World Scientific. This book was released on 2003 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a sequel to the first volume of The Chemistry.of Nanostructured Materials. It covers the most exciting developments in the nanostructured materials field for the past five to ten years, with a particular.focus on their applications in energy conversion and energy storage. Prominent authors of recognized authority in the field contribute their expertise in the review chapters. --Book Jacket.
Download or read book 3D Nanoelectronic Computer Architecture and Implementation written by David Crawley and published by CRC Press. This book was released on 2020-01-15 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is becoming increasingly clear that the two-dimensional layout of devices on computer chips hinders the development of high-performance computer systems. Three-dimensional structures will be needed to provide the performance required to implement computationally intensive tasks. 3-D Nanoelectronic Computer Architecture and Implementation reviews the state of the art in nanoelectronic device design and fabrication and discusses the architectural aspects of 3-D designs, including the possible use of molecular wiring and carbon nanotube interconnections. This is a valuable reference for those involved in the design and development of nanoelectronic devices and technology.
Download or read book Macroeconomics for Business and Society written by Francis Gerard Adams and published by World Scientific. This book was released on 2002 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years the world economy has been undergoing drastic changes, the East Asian miracle, the financial crisis, and today, globalization and the fundamental changes associated with the ?new economy?. This book integrates these developments with macroeconomics for business managers and policymakers.Macroeconomics is essential background for the business manager and policymaker. Consequently macroeconomics is an integral part of the business curriculum in mature and developing countries alike. And well it should be. The economy affects decisions by investors, manufacturers, distributors, importers and exporters, etc. in all parts of the world. Often, it is the difference between growth and profitability on one hand, and stagnation or failure on the other. In recent years as the world economy has undergone overwhelming changes, especially in East Asia and now in the advanced countries, understanding what is going on in the local economy and ?out there in the world? has become a particular challenge to managers. The new developments, of which the ?new economy? is the most recent one, do not supercede the basic theoretical framework of macroeconomics. But they add greatly to the challenge of understanding the economic situation and to its uncertainty.This book was originally written to meet the needs of a business curriculum based on the program at the Sasin Graduate Institute of Business Administration of Chulalongkorn University in Bangkok in collaboration with the Wharton and Kellogg Business Schools in the United States. The book is intended for a broad audience ? both domestic and international ? that includes mature MBA business students, intermediate level undergraduates, and informed laypersons.
Download or read book Aligned Carbon Nanotubes written by Zhifeng Ren and published by Springer Science & Business Media. This book was released on 2012-09-05 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a survey of the physics and fabrication of carbon nanotubes and their applications in optics, electronics, chemistry and biotechnology. It focuses on the structural characterization of various carbon nanotubes, fabrication of vertically or parallel aligned carbon nanotubes on substrates or in composites, physical properties for their alignment, and applications of aligned carbon nanotubes in field emission, optical antennas, light transmission, solar cells, chemical devices, bio-devices, and many others. Major fabrication methods are illustrated in detail, particularly the most widely used PECVD growth technique on which various device integration schemes are based, followed by applications such as electrical interconnects, nanodiodes, optical antennas, and nanocoax solar cells, whereas current limitations and challenges are also be discussed to lay the foundation for future developments.
Download or read book Carbon Nanotubes written by Charan Masarapu and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation covers several diverse and novel aspects of carbon nanotubes (CNTs) related to synthesis, properties and perspective applications in devices. Growth of CNTs on electrically conductive substrates is promising for many applications. However, the lack of complete knowledge of the substrate effects on the CNT growth poses many technical challenges. The mechanism for the growth of aligned multiwall carbon nanotubes (MWNTs) directly on chemically treated stainless steel (type 304) using a chemical vapor deposition process (CVD) is unveiled through detailed X-ray photoelectron spectroscopy (XPS) analysis. It is found that the CNTs prefer to grow on the enriched surface of iron oxides obtained by the chemical treatment rather than on the passive chromium oxide films generally present on the surface of the as-received stainless steel substrates. According to the XPS peak fitting results, to obtain high density aligned MWNTs, the ratio of iron oxide to chromium oxide on the surface of stainless steel should be much greater than one. Based on this growth mechanism, for the first time, site selective MWNT synthesis on stainless substrate is demonstrated. This kind of controlled CNT growth on conducting substrate results in very promising, diverse applications of CNTs in futuristic nanodevices. Understanding the physical properties of MWNTs, such as the specific heat at low temperature, leads to developing more efficient CNT based temperature sensors and thermal devices. In this regard, the specific heat of an aligned bulk MWNT sample peeled from SiO 2 substrate is measured from 300 K to 1.8 K. The dimensional behavior of the specific heat curve at different temperature ranges is accurately analyzed. Interestingly, a T 2 dependence of the specific heat is observed below 5 K, suggesting a nuclear hyperfine component pertaining to the Schottky effect. This effect arises from the magnetic impurities in the MWNTs, whose presence is confirmed by thermogravimetric analysis and microscopy observations. The final goal of synthesizing the CNTs is for a purposeful application, where the properties of the CNTs can be effectively utilized. CNTs are excellent field emitters and have good high temperature stability. A field emission diode for high temperature operation with aligned MWNTs synthesized on SiO 2 substrate is demonstrated for the first time. The diode showed stable performance from 25 °C all the way up to 300 °C, without any significant change in the diode parameters both in the forward and reverse bias. Such kind of diode is very useful in electronic devices employed in extreme temperature environments for down-hole drilling, seismographic and space applications. CNTs have attracted a lot of attention as electrode materials in electrochemical energy storage devices due to their porous structure and high surface area. The success of the aligned MWNT synthesis directly on the conducting substrate stainless steel provided the opportunity to test the MWNTs as anode material in rechargeable lithium ion battery. The assembled cell showed amazing performance at a high charge-discharge rate (1C rate) with a marked increase in the specific capacitance with continuous charge-discharge cycling. The increase in the specific capacitance with cycling is attributed to the combined effect of the gradual MWNT structural changes and the contribution of the stainless steel substrate which is actually acting as a current collector in Li ion intercalation process. An increase in the specific capacitance with cycling means the lifetime of the battery increases with usage which is extraordinary for any electronic device powered by rechargeable lithium ion batteries. Electrochemical power sources that offer high energy and power densities and can also withstand a harsh temperature environment have become extremely desirable in applications ranging from hybrid electric vehicles to military weapons. In this regard, a supercapacitor coin cell with singlewall carbon nanotube (SWNT) film electrodes and polypropylene carbonate organic electrolyte is assembled and tested in the temperature range from 25 °C to 100 °C. Repeated electrochemical measurements - cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge discharge, performed at 25 °C and 100 °C with continuous heating and cooling showed very consistent performance without any cell degradation. Cyclic voltammograms displayed ideal capacitive behavior even at a significant scan rate of 1000 mV/s at 25 °C and 100 °C. The ability of the cell to undergo several tens of thousands of galvanostatic charge-discharge cycles at 100 °C and still work normally when cooled back to 25 °C is highly exceptional. Also, the cell is able to withstand current densities as high as 100 A/g during the galvanostatic charge-discharge yielding eminent power densities. The charge-discharge study at 25 °C with a current density of 20 A/g up to 264700 cycles showed excellent capacitance stability. The usage of such a supercapacitor potentially enables far-reaching advances in back-up energy storage and high pulse power applications. (Abstract shortened by UMI.).
Download or read book Handbook of Emerging Materials for Semiconductor Industry written by Young Suh Song and published by Springer Nature. This book was released on with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Carbon Nanotube Electronics written by Ali Javey and published by Springer Science & Business Media. This book was released on 2009-04-21 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a complete overview of the field of carbon nanotube electronics. It covers materials and physical properties, synthesis and fabrication processes, devices and circuits, modeling, and finally novel applications of nanotube-based electronics. The book introduces fundamental device physics and circuit concepts of 1-D electronics. At the same time it provides specific examples of the state-of-the-art nanotube devices.
Download or read book Industrial Applications of Carbon Nanotubes written by Huisheng Peng and published by Elsevier. This book was released on 2016-10-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial Applications of Carbon Nanotubes covers the current applications of carbon nanotubes in various industry sectors, from the military to visual display products, and energy harvesting and storage. It also assesses the opportunities and challenges for increased commercialization and manufacturing of carbon nanotubes in the years ahead. Real-life case studies illustrate how carbon nanotubes are used in each industry sector covered, providing a valuable resource for scientists and engineers who are involved and/or interested in carbon nanotubes in both academia and industry. The book serves as a comprehensive guide to the varied uses of carbon nanotubes for specialists in many related fields, including chemistry, physics, biology, and textiles.
Download or read book Controlled Growth and Metrology of Carbon Nanotubes on Supported Co Mo Catalysts written by Veronica Magali Irurzun and published by . This book was released on 2011 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Carbon Nanotube Devices written by and published by John Wiley & Sons. This book was released on 2008-05-05 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following on from the first AMN volume, this handy reference and textbook examines the topic of nanosystem design in further detail. It explains the physical and chemical basics behind the design and fabrication of nanodevices, covering all important, recent advances in the field, while introducing nanosystems to less experienced readers. The result is an important source for a fast, accurate overview of the state of the art of nanosystem realization, summarizing further important literature.
Download or read book Electronic Devices Architectures for the NANO CMOS Era written by Simon Deleonibus and published by CRC Press. This book was released on 2019-05-08 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, internationally recognized researchers give a state-of-the-art overview of the electronic device architectures required for the nano-CMOS era and beyond. Challenges relevant to the scaling of CMOS nanoelectronics are addressed through different core CMOS and memory device options in the first part of the book. The second part reviews new device concepts for nanoelectronics beyond CMOS. The book covers the fundamental limits of core CMOS, improving scaling by the introduction of new materials or processes, new architectures using SOI, multigates and multichannels, and quantum computing.
