Pulsed-Laser Deposited Amorphous Diamond and Related Materials: Synthesis, Characterization, and Field Emission Properties PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Amorphous carbon films with variable sp[sup 3] content were produced by ArF (193nm) pulsed laser deposition. An in-situ ion probe was used to measure kinetic energy of C[sup+] ions. In contrast to measurements made as a function of laser fluence, ion probe measurements of kinetic energy are a convenient as well as more accurate and fundamental method for monitoring deposition conditions, with the advantage of being readily transferable for inter-laboratory comparisons. Electron energy loss spectroscopy (EELS) and spectroscopic ellipsometry measurements reveal that tetrahedral amorphous carbon (ta-C) films with the most diamond-like properties are obtained at the C ion kinetic energy of[approximately]90 eV. Film properties are uniform within a 12-15[degree] angle from the plume centerline. Tapping-mode atomic force microscope measurements show that films deposited at near-optimum kinetic energy are extremely smooth, with rms roughness of only[approximately] 1[angstrom] over distances of several hundred nm. Field emission (FE) measurements show that ta-C does not appear to be a good electron emitter. After conditioning of ta-C films deposited on n-type Si a rather high turn-on voltage of[approximately]50 V/[micro]m was required to draw current of[approximately]1 nA to the probe. The emission was unstable and typically ceased after a few minutes of operation. The FE tests of ta-C and other materials strongly suggest that surface morphology plays a dominant role in the FE process, in agreement with conventional Fowler-Nordheim theory.
Author: A.A. Gippius Publisher: Elsevier ISBN: 0444596771 Category : Science Languages : en Pages : 392
Book Description
This volume addresses the burgeoning field of wide band gap materials. The 64 contributed and invited papers will do much to stimulate the well-justified ongoing work, both theoretical and experimental, in this area. The high standard of the papers attests to the significant progress that has been made in this field, as well as reporting on the challenging problems that still remain to be solved.
Author: Anatoliy Evtukh Publisher: John Wiley & Sons ISBN: 1119037956 Category : Technology & Engineering Languages : en Pages : 469
Book Description
Introducing up-to-date coverage of research in electron field emission from nanostructures, Vacuum Nanoelectronic Devices outlines the physics of quantum nanostructures, basic principles of electron field emission, and vacuum nanoelectronic devices operation, and offers as insight state-of-the-art and future researches and developments. This book also evaluates the results of research and development of novel quantum electron sources that will determine the future development of vacuum nanoelectronics. Further to this, the influence of quantum mechanical effects on high frequency vacuum nanoelectronic devices is also assessed. Key features: • In-depth description and analysis of the fundamentals of Quantum Electron effects in novel electron sources. • Comprehensive and up-to-date summary of the physics and technologies for THz sources for students of physical and engineering specialties and electronics engineers. • Unique coverage of quantum physical results for electron-field emission and novel electron sources with quantum effects, relevant for many applications such as electron microscopy, electron lithography, imaging and communication systems and signal processing. • New approaches for realization of electron sources with required and optimal parameters in electronic devices such as vacuum micro and nanoelectronics. This is an essential reference for researchers working in terahertz technology wanting to expand their knowledge of electron beam generation in vacuum and electron source quantum concepts. It is also valuable to advanced students in electronics engineering and physics who want to deepen their understanding of this topic. Ultimately, the progress of the quantum nanostructure theory and technology will promote the progress and development of electron sources as main part of vacuum macro-, micro- and nanoelectronics.
Author: Satoshi Koizumi Publisher: John Wiley & Sons ISBN: 3527623183 Category : Technology & Engineering Languages : en Pages : 374
Book Description
Here, leading scientists report on why and how diamond can be optimized for applications in bioelectronic and electronics. They cover such topics as growth techniques, new and conventional doping mechanisms, superconductivity in diamond, and excitonic properties, while application aspects include quantum electronics at room temperature, biosensors as well as diamond nanocantilevers and SAWs. Written in a review style to make the topic accessible for a wider community of scientists working in interdisciplinary fields with backgrounds in physics, chemistry, biology and engineering, this is essential reading for everyone working in environments that involve conventional electronics, biotechnology, quantum computing, quantum cryptography, superconductivity and light emission from highly excited excitonic systems.
Author: National Research Council Publisher: National Academies Press ISBN: 0309041961 Category : Technology & Engineering Languages : en Pages : 111
Book Description
Recent discoveries enabling the growth of crystalline diamond by chemical vapor deposition offer the potential for a wide variety of new applications. This new book examines the state of the technology arising from these discoveries in relation to other allied materials, such as high-pressure diamond and cubic boron nitride. Most of the potential defense, space, and commercial applications are related to diamond's hardness, but some utilize its other qualities, such as optical and electronic properties. The authors review growth processes and discuss techniques for characterizing the resulting materials' properties. Crystalline diamond is emphasized, but other diamond-like materials (e.g. silicon carbide and amorphous carbon containing hydrogen) are also examined. In addition, the authors identify scientific, technical, and economic problems that could impede the rapid exploitation of these materials, and present recommendations covering broad areas of research and development.
Author: Qiang Hu Publisher: ISBN: Category : Languages : en Pages :
Book Description
The studies covered in this dissertation concentrate on the various forms of diamond films synthesized by chemical vapor deposition (CVD) method, including microwave CVD and hot filament CVD. According to crystallinity and grain size, a variety of diamond forms primarily including microcrystalline (most commonly referred to as polycrystalline) and nanocrystalline diamond films, diamond-like carbon (DLC) films were successfully synthesized. The as-grown diamond films were optimized by changing deposition pressure, volume of reactant gas hydrogen (H2) and carrier gas argon (Ar) in order to get high-quality diamond films with a smooth surface, low roughness, preferred growth orientation and high sp3 bond contents, etc. The characterization of diamond films was carried out by metrological and analytical techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic force microscopy (AFM) and Raman spectroscopy. The results of characterization served as feedback to optimize experimental parameters, so as to improve the quality of diamond films. A good understanding of the diamond film properties such as mechanical, electrical, optical and biological properties, which are determined by the qualities of diamond films, is necessary for the selection of diamond films for different applications. The nanocrystalline diamond nanowires grown by a combination of vapor-liquid-solid (VLS) method and CVD method in two stages, and the graphene grown on silicon substrate with nickel catalytic thin film by single CVD method were also investigated in a touch-on level.
Author: Guowei Yang Publisher: CRC Press ISBN: 9814241520 Category : Science Languages : en Pages : 1166
Book Description
This book focuses on the fundamental concepts and physical and chemical aspects of pulsed laser ablation of solid targets in liquid environments and its applications in the preparation of nanomaterials and fabrication of nanostructures. The areas of focus include basic thermodynamic and kinetic processes of laser ablation in liquids, and its applic
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Author: 
Author: A.A. Gippius
Author: Electrochemical Society. Meeting
Author: Anatoliy Evtukh
Author: Satoshi Koizumi
Author: National Research Council
Author: Qiang Hu
Author: Timothy D. Corrigan
Author: Guowei Yang
Author: