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Author: Taekyung Kim
Publisher:
ISBN: 9780549096146
Category :
Languages : en
Pages : 144
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Book Description
Carbon nanotubes (CNTs) are promising materials for future nanoelectronic applications thanks to their excellent electrical and thermal transport properties and the quasi one-dimensional nanostructure. However, there are many structural forms of CNTs and each has its own properties. Correlation of structure and electrical transport properties is still ambiguous. In this thesis, a novel design of field-effect transistor is proposed and constructed. This unique device architecture allows us not only to investigate the electrical transport properties of the nanotubes, but also to characterize atomic structures of the same nanotubes by transmission electron microscopy (TEM). The results obtained form the combined electrical transport measurements and structural characterizations are presented. The current-voltage (I-V) characteristics are interpreted in terms of structural forms of nanotubes. Examples include single-walled nanotube with an intramolecular junction, double-walled nanotube, and nanotube bundles. Depending on the tube configuration with respect to the external electric field, the I-V characteristics are dramatically changed. Comparison with ab initio simulations done at North Carolina State University show that the screening of the electric field breaks the cylindrical symmetry of the tubes and affects their band structure, which is supported by experiments. These results emphasize the importance of atomic structure characterization to our understanding of the electrical transport properties of nanotubes and provide a general approach for future studies of structure-property relationships in 1D nanostructures.
Author: Taekyung Kim
Publisher:
ISBN: 9780549096146
Category :
Languages : en
Pages : 144
Get Book Here
Book Description
Carbon nanotubes (CNTs) are promising materials for future nanoelectronic applications thanks to their excellent electrical and thermal transport properties and the quasi one-dimensional nanostructure. However, there are many structural forms of CNTs and each has its own properties. Correlation of structure and electrical transport properties is still ambiguous. In this thesis, a novel design of field-effect transistor is proposed and constructed. This unique device architecture allows us not only to investigate the electrical transport properties of the nanotubes, but also to characterize atomic structures of the same nanotubes by transmission electron microscopy (TEM). The results obtained form the combined electrical transport measurements and structural characterizations are presented. The current-voltage (I-V) characteristics are interpreted in terms of structural forms of nanotubes. Examples include single-walled nanotube with an intramolecular junction, double-walled nanotube, and nanotube bundles. Depending on the tube configuration with respect to the external electric field, the I-V characteristics are dramatically changed. Comparison with ab initio simulations done at North Carolina State University show that the screening of the electric field breaks the cylindrical symmetry of the tubes and affects their band structure, which is supported by experiments. These results emphasize the importance of atomic structure characterization to our understanding of the electrical transport properties of nanotubes and provide a general approach for future studies of structure-property relationships in 1D nanostructures.
Author: Ashok Srivastava
Publisher: CRC Press
ISBN: 9814613118
Category : Science
Languages : en
Pages : 153
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Book Description
Discovery of one-dimensional material carbon nanotubes in 1991 by the Japanese physicist Dr. Sumio Iijima has resulted in voluminous research in the field of carbon nanotubes for numerous applications, including possible replacement of silicon used in the fabrication of CMOS chips. One interesting feature of carbon nanotubes is that these can be me
Author: Mathias Kobylko
Publisher:
ISBN:
Category :
Languages : en
Pages : 351
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Book Description
This PhD thesis consists of two parts: the first deals with the electrical transport properties of individual carbon nanotubes (CNTs) and the second with their optical properties. The first part describes the ex-situ and in-situ experiments (inside a transmission electron microscope (TEM)) which we have performed on individual CNTs according to the liquid metal contact method. Our experiments show that this method is not reliable and that results obtained this way (being until now interpreted in terms of ballistic transport properties of CNTs) have to be reinterpreted. These observations are completed by a classical model which demonstrates the general inaptitude of this method for the study of the transport properties of the CNTs. In order to allow a simultaneous visualization during electrical transport experiments on individual CNTs, we have also got involved with the development and construction of two in-situ TEM holders for transport experiments on individual CNTs, one of which is also designed for their mechanical manipulation. The second part describes the correlated electron diffraction and resonant Raman spectroscopy experiments which we have performed on individual CNTs and small bundles. Our experiments on individual CNTs present a direct validation of the theoretical predictions (including the excitonic and correlation effects) of the dependency of the optical transition energies of the CNTs on their structure. In our experiments on small bundles, we have been able to observe two different coupling effects: a degeneracy lifting of the optical transition energy in a homogenous bundle and a mechanically mediated energy transfer between unequal CNTs in a bundle.
Author: Ali Javey
Publisher: Springer Science & Business Media
ISBN: 0387692851
Category : Technology & Engineering
Languages : en
Pages : 275
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Book Description
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.
Author: Michael J. O’Connell
Publisher: CRC Press
ISBN: 1420004212
Category : Technology & Engineering
Languages : en
Pages : 339
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Book Description
Since their discovery more than a decade ago, carbon nanotubes (CNTs) have held scientists and engineers in captive fascination, seated on the verge of enormous breakthroughs in areas such as medicine, electronics, and materials science, to name but a few. Taking a broad look at CNTs and the tools used to study them, Carbon Nanotubes: Properties and Applications comprises the efforts of leading nanotube researchers led by Michael O’Connell, protégé of the late father of nanotechnology, Richard Smalley. Each chapter is a self-contained treatise on various aspects of CNT synthesis, characterization, modification, and applications. The book opens with a general introduction to the basic characteristics and the history of CNTs, followed by discussions on synthesis methods and the growth of “peapod” structures. Coverage then moves to electronic properties and band structures of single-wall nanotubes (SWNTs), magnetic properties, Raman spectroscopy of electronic and chemical behavior, and electromechanical properties and applications in NEMS (nanoelectromechanical systems). Turning to applications, the final sections of the book explore mechanical properties of SWNTs spun into fibers, sidewall functionalization in composites, and using SWNTs as tips for scanning probe microscopes. Taking a fresh look at this burgeoning field, Carbon Nanotubes: Properties and Applications points the way toward making CNTs commercially viable.
Author: Stephanie Reich
Publisher: John Wiley & Sons
ISBN: 3527618058
Category : Technology & Engineering
Languages : en
Pages : 224
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Book Description
Carbon nanotubes are exceptionally interesting from a fundamental research point of view. Many concepts of one-dimensional physics have been verified experimentally such as electron and phonon confinement or the one-dimensional singularities in the density of states; other 1D signatures are still under debate, such as Luttinger-liquid behavior. Carbon nanotubes are chemically stable, mechanically very strong, and conduct electricity. For this reason, they open up new perspectives for various applications, such as nano-transistors in circuits, field-emission displays, artificial muscles, or added reinforcements in alloys. This text is an introduction to the physical concepts needed for investigating carbon nanotubes and other one-dimensional solid-state systems. Written for a wide scientific readership, each chapter consists of an instructive approach to the topic and sustainable ideas for solutions. The former is generally comprehensible for physicists and chemists, while the latter enable the reader to work towards the state of the art in that area. The book gives for the first time a combined theoretical and experimental description of topics like luminescence of carbon nanotubes, Raman scattering, or transport measurements. The theoretical concepts discussed range from the tight-binding approximation, which can be followed by pencil and paper, to first-principles simulations. We emphasize a comprehensive theoretical and experimental understanding of carbon nanotubes including - general concepts for one-dimensional systems - an introduction to the symmetry of nanotubes - textbook models of nanotubes as narrow cylinders - a combination of ab-initio calculations and experiments - luminescence excitation spectroscopy linked to Raman spectroscopy - an introduction to the 1D-transport properties of nanotubes - effects of bundling on the electronic and vibrational properties and - resonance Raman scattering in nanotubes.
Author: Fouad Sabry
Publisher: One Billion Knowledgeable
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 500
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Book Description
What Is Carbon Nanotube Field Effect Transistor A carbon nanotube field-effect transistor, also known as a CNTFET, is a kind of field-effect transistor that makes use of a single carbon nanotube or an array of carbon nanotubes as the channel material in place of bulk silicon, as is done in the conventional MOSFET construction. Since they were first exhibited in 1998, there have been significant advancements in CNTFET technology. How You Will Benefit (I) Insights, and validations about the following topics: Chapter 1: Carbon nanotube field-effect transistor Chapter 2: Carbon nanotube Chapter 3: JFET Chapter 4: Schottky barrier Chapter 5: Electron mobility Chapter 6: Nanoelectromechanical systems Chapter 7: Threshold voltage Chapter 8: Organic field-effect transistor Chapter 9: Ballistic conduction Chapter 10: Hybrid solar cell Chapter 11: Potential applications of carbon nanotubes Chapter 12: Carbon nanotubes in photovoltaics Chapter 13: Optical properties of carbon nanotubes Chapter 14: Carbon nanotube nanomotor Chapter 15: NanoIntegris Chapter 16: Ballistic conduction in single-walled carbon nanotubes Chapter 17: Tunnel field-effect transistor Chapter 18: Field-effect transistor Chapter 19: Carbon nanotubes in interconnects Chapter 20: Synthesis of carbon nanotubes Chapter 21: Vertically aligned carbon nanotube arrays (II) Answering the public top questions about carbon nanotube field effect transistor. (III) Real world examples for the usage of carbon nanotube field effect transistor in many fields. (IV) 17 appendices to explain, briefly, 266 emerging technologies in each industry to have 360-degree full understanding of carbon nanotube field effect transistor' technologies. Who This Book Is For Professionals, undergraduate and graduate students, enthusiasts, hobbyists, and those who want to go beyond basic knowledge or information for any kind of carbon nanotube field effect transistor.
Author: Changxin Chen
Publisher: Springer Science & Business Media
ISBN: 3642014992
Category : Technology & Engineering
Languages : en
Pages : 115
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Book Description
This book introduces a novel ultrasonic nanowelding technology of carbon nanotubes (CNTs) to metal electrodes and its application for CNT devices. It will be of interest to graduates, scientists and engineers working on CNTs and related topics.
Author: Francois Leonard
Publisher: William Andrew
ISBN: 0815519680
Category : Technology & Engineering
Languages : en
Pages : 411
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Book Description
Possibly the most impactful material in the nanotechnology arena, carbon nanotubes have spurred a tremendous amount of scientific research and development. Their superior mechanical and chemical robustness makes them easily manipulable and allows for the assembly of various types of devices, including electronic, electromechanical, opto-electronic and sensing devices.In the field of nanotube devices, however, concepts that describe the properties of conventional devices do not apply. Carbon nanotube devices behave much differently from those using traditional materials, and offer entirely new functionality. This book – designed for researchers, engineers and graduate students alike – bridges the experimental and theoretical aspects of carbon nanotube devices. It emphasizes and explains the underlying physics that govern their working principles, including applications in electronics, nanoelectromechanical systems, field emission, optoelectronics and sensing. Other topics include: electrical contacts, p-n junctions, transistors, ballistic transport, field emission, oscillators, rotational actuators, electron-phonon scattering, photoconductivity, and light emission. Many of the aspects discussed here differ significantly from those learned in books or traditional materials, and are essential for the future development of carbon nanotube technology.• Bridges experimental and theoretical aspects of carbon nanotube devices, focusing on the underlying physics that govern their working principles • Explains applications in electronics, nanoelectromechanical systems, field emission, optoelectronics and sensing. • Other topics include: electrical contacts, p-n junctions, transistors, ballistic transport, field emission, oscillators, rotational actuators, electron-phonon scattering, photoconductivity, and light emission. • Covers aspects that significantly differ from those learned in traditional materials, yet are essential for future advancement of carbon nanotube technology.* Bridges experimental and theoretical aspects of carbon nanotube devices, focusing on the underlying physics that govern their working principles * Explains applications in electronics, nanoelectromechanical systems, field emission, optoelectronics and sensing.* Other topics include: electrical contacts, p-n junctions, transistors, ballistic transport, field emission, oscillators, rotational actuators, electron-phonon scattering, photoconductivity, and light emission* Covers aspects that significantly differ from those learned in traditional materials, yet are essential for future advancement of carbon nanotube technology.
Author: Prasanta Ghosh
Publisher: BoD – Books on Demand
ISBN: 1838811842
Category : Technology & Engineering
Languages : en
Pages : 184
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Book Description
Carbon Nanotubes - Redefining the World of Electronics is a compendium of current, state-of-the-art information about carbon nanotubes (CNTs) and their potential applications in electronics. Chapters cover such topics as the incorporation of CNTs into electronic devices, CNT-based rubber composites for electronic components, the role of CNTs in different energy storage and conversion systems, and ternary implementations of carbon nanotube field-effect transistor (CNTFET) circuits.
