Download or read book Scanning Tunneling Spectroscopy of Fullerenes Diamondoids and Organometallic Molecular Nanostructures written by Xinghua Lu and published by . This book was released on 2006 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scanning Tunneling Spectroscopy of Fullerene Nanostructures written by Michael Konrad Grobis and published by . This book was released on 2005 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Imaging and Spectroscopy of Molecular Diamondoids and Topological Nanostructures written by Jason Christopher Randel and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Identification and characterization of new and novel materials is one of the major challenges facing the continued advancement of digital electronics. Traditionally, the electronics industry has been dominated by silicon. However, as devices begin to approach atomic scales, state-of-the-art electronics will have to increasingly embrace new and complementary materials, some of which bear little resemblance to their silicon brethren. Molecular systems and crystals that contain novel fermionic states have the potential to rapidly and greatly impact the electronics industry, given the right advances in fabrication and performance. This thesis reports the use of scanning tunneling microscopy to explore a variety of new materials that exhibit novel--and potentially marketable--electronic properties, yet that can also be synthesized using relatively low-cost and straightforward techniques. The first material is the family of diamondoid molecules, which represent an exciting new direction in the field of nanoscale carbon. These molecules are carbon cages consisting of the smallest caged subunits of the diamond lattice, with surface bonds saturated by hydrogen. While theoretically known to be stable, diamondoids have been experimentally inaccessible due to synthesis roadblocks and lack of natural sources, until recently purified from crude oil. This advancement allows for potential access to the unique and extreme properties of diamond (rigidity, thermal conductivity, wide band-gap, and doping behavior, among others) in nanoscale and molecular devices. Of particular interest is the cross-over regime between the molecule-like behavior expected of the smaller diamondoids and the properties of macroscopic diamond. The first part of this dissertation explores the hierarchical nature of these molecules, investigated at the single-molecule level with scanning tunneling microscopy (STM). I will present structural data showing the quality of self-assembled monolayers (SAMs) composed of a series of thiolated diamondoids, and the variation that emerges as the number of diamondoid cages increases. I-V spectroscopy (combined with density functional calculations) allows us to determine the energy band line-ups of the molecular orbitals. The robustness of the SAMs and the insulating behavior implied by spectroscopy suggest that--at the few-eV energy scale typical of STM--diamondoid thiol SAMs may be useful as rigid decoupling layers, tunable by appropriate choice of cage structure. Moving beyond thiolated molecules (which have well-documented uses in the field of molecular electronics), we have begun exploring more exotic diamondoid-based derivates as novel nanoelectronic elements. Over the past few decades, new fields of research have emerged based on the sp2 molecular forms of carbon such as graphene, fullerenes, and nanotubes. Materials that sit at the intersection of the sp2 and sp3 bonding structures are an exciting new area for nanoscale science, combining the unique electronic properties of these two very different hybridizations. I will introduce hybrid molecules that fuse the sp2 and sp3 allotropes-in the form of C60 fullerenes and diamondoids-into one well-defined molecular system. These molecules were synthesized with the intention of creating diode-like elements for single- or few-molecule electronic devices. STM measurements on SAMs of these molecules indeed show evidence of unconventional rectifying behavior. These measurements represent (to our knowledge) the first purely hydrocarbon rectifier, and demonstrate the emerging diversity of electronic phenomena observed in diamondoid-based molecules. The second half of this thesis turns from molecular systems to a particular set of crystalline systems that exhibit electrons that behave as Dirac fermions. These particles are very different from the standard electrons in metals or semiconductors in that they propagate relativistically, despite being confined to a solid state crystal. STM has proven to be an indispensable tool in characterizing the signatures of such particles. These materials have a host of technological applications, so lowering the cost of synthesis is an important research direction. I therefore survey a growth techniques by using STM to look for Dirac fermions in graphene and topological insulator systems. As in the molecular systems introduced above, STM studies are important in these Dirac systems because their unique transport behavior depends critically on their nanoscale properties.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scanning Tunneling Spectroscopy of Molecular Thin Films and Semiconductor Nanostructures written by Sandeep Gaan and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Core Concepts in Supramolecular Chemistry and Nanochemistry written by Jonathan W. Steed and published by John Wiley & Sons. This book was released on 2007-04-30 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supramolecular chemistry and nanochemistry are two strongly interrelated cutting edge frontiers in research in the chemical sciences. The results of recent work in the area are now an increasing part of modern degree courses and hugely important to researchers. Core Concepts in Supramolecular Chemistry and Nanochemistry clearly outlines the fundamentals that underlie supramolecular chemistry and nanochemistry and takes an umbrella view of the whole area. This concise textbook traces the fascinating modern practice of the chemistry of the non-covalent bond from its fundamental origins through to it expression in the emergence of nanochemistry. Fusing synthetic materials and supramolecular chemistry with crystal engineering and the emerging principles of nanotechnology, the book is an ideal introduction to current chemical thought for researchers and a superb resource for students entering these exciting areas for the first time. The book builds from first principles rather than adopting a review style and includes key references to guide the reader through influential work. supplementary website featuring powerpoint slides of the figures in the book further references in each chapter builds from first principles rather than adopting a review style includes chapter on nanochemistry clear diagrams to highlight basic principles
Download or read book Carbon Allotropes Metal Complex Chemistry Properties and Applications written by Boris Ildusovich Kharisov and published by Springer. This book was released on 2019-01-02 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a detailed description of metal-complex functionalized carbon allotrope forms, including classic (such as graphite), rare (such as M- or T-carbon), and nanoforms (such as carbon nanotubes, nanodiamonds, etc.). Filling a void in the nanotechnology literature, the book presents chapters generalizing the synthesis, structure, properties, and applications of all known carbon allotropes. Metal-complex composites of carbons are described, along with several examples of their preparation and characterization, soluble metal-complex carbon composites, cost-benefit data, metal complexes as precursors of carbon allotropes, and applications. A lab manual on the synthesis and characterization of carbon allotropes and their metal-complex composites is included. Provides a complete description of all carbon allotropes, both classic and rare, as well as carbon nanostructures and their metal-complex composites; Contains a laboratory manual of experiments on the synthesis and characterization of metal-complex carbon composites; Discusses applications in diverse fields, such as catalysis on supporting materials, water treatment, sensors, drug delivery, and devices.
Download or read book Cage Metal Complexes written by Yan Voloshin and published by Springer. This book was released on 2017-05-11 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fundamental book presents the most comprehensive summary of the current state in chemistry of cage metal complexes. After their previous book “The Encapsulation Phenomenon” (www.springer.com/978-3-319-27737-0) the authors in this book focus on the encapsulation of metal ions by different types of three-dimensional mono- and polynucleating caging ligands. Within these cage metal complexes, (metal) ions can be isolated from external factors. The book provides both a classification of the cage compounds and summaries of synthetic approaches. On that basis the authors then describe the unique chemical and physical properties and the resulting reactivity of the cage compounds, as well as practical and potential applications as potent topological drugs and prodrugs, antifibrillogenic agents, radiodiagnostic and radiotherapeutic compounds, paramagnetic probes, single-molecule magnets, electrocatalysts for hydrogen production, (photo)electronic devices, and many more. Readers will find a well-structured and concise overview, with particular emphasis on a review of synthesis and reactivity of various cage metal complexes, summarizing over 400 literature references, clearly presented in over 300 color schemes and figures.
Download or read book Introduction to Nanoscience and Nanotechnology written by Gabor L. Hornyak and published by CRC Press. This book was released on 2008-12-22 with total page 1791 pages. Available in PDF, EPUB and Kindle. Book excerpt: The maturation of nanotechnology has revealed it to be a unique and distinct discipline rather than a specialization within a larger field. Its textbook cannot afford to be a chemistry, physics, or engineering text focused on nano. It must be an integrated, multidisciplinary, and specifically nano textbook. The archetype of the modern nano textbook
Download or read book Synthetic Applications written by Rajender S. Varma and published by Walter de Gruyter GmbH & Co KG. This book was released on 2022-05-09 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic nanocatalysts are becoming an important tool for greener catalytic processes in chemical transformations in view of the ease of their removal from a reaction medium. This book explores assorted magnetic nanocatalysts, their deployment in synthesis, chemical transformation and their recovery and reuse. Various thematic topics embodied include magnetic nanocatalysts for S-S bond formation, N-heterocycle formation, C-heteroatom bond formation, silica-supported catalysts, multicomponent reactions, including their recyclability; another available volume emphasizes the utility of magnetic nanocatalysts in industrial appliances.
Download or read book Applications of Polyhedral Oligomeric Silsesquioxanes written by Claire Hartmann-Thompson and published by Springer Science & Business Media. This book was released on 2011-01-03 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: The commercial availability and decreasing cost of polyhedral oligomeric silsesquioxanes in recent years has opened up the field to everybody who wishes to apply these unique properties in their own technologies. This is the first book to provide a comprehensive overview of these applications, and covers the synthesis, characterization and history of polyhedral oligomeric silsesquioxanes, their use as metallasilsesquioxane catalysts, their effect upon polymer properties and plastics performance, and their use in superhydrophobic nanocomposites, and electronics, energy, space and biomedical applications. "Applications of Polyhedral Oligomeric Silsesquioxanes" is a valuable reference for those working across a range of disciplines, including chemists, materials scientists, polymer physicists, plastics engineers, surface scientists, and anybody with a commercial or academic interest in plastics, composite materials, space materials, dental materials, tissue engineering, drug delivery, lithography, fuel cells, batteries, lubricants, or liquid crystal, LED, sensor, photovoltaic or biomedical devices.
Download or read book Encyclopedia of Supramolecular Chemistry Two Volume Set Print written by Jerry L. Atwood and published by CRC Press. This book was released on 2013-10-09 with total page 1745 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two-volume Encyclopedia of Supramolecular Chemistry offers authoritative, centralized information on a rapidly expanding interdisciplinary field. User-friendly and high-quality articles parse the latest supramolecular advancements and methods in the areas of chemistry, biochemistry, biology, environmental and materials science and engineering, physics, computer science, and applied mathematics. Designed for specialists and students alike, the set covers the fundamentals of supramolecular chemistry and sets the standard for relevant future research.
Download or read book Introduction to Nanoscience written by Gabor L. Hornyak and published by CRC Press. This book was released on 2008-05-15 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tomorrow's nanoscientist will have a truly interdisciplinary and nano-centric education, rather than, for example, a degree in chemistry with a specialization in nanoscience. For this to happen, the field needs a truly focused and dedicated textbook. This full-color masterwork is such a textbook. It introduces the nanoscale along with the societal
Download or read book New Frontiers in Organoselenium Compounds written by Eder João Lenardão and published by Springer. This book was released on 2018-06-29 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent advances in and perspectives on the use of organoselenium compounds, primarily highlighting the new frontiers in the field of Green Chemistry, their therapeutic and biological relevance and new materials. Throughout its 200 pages, readers will find an updated and comprehensive review of new aspects of organoselenium chemistry and biochemistry. Fully referenced and written in an easy to read style, it offers readers a primary resource for including organoselenium derivatives in their projects. This book will be of interest to specialists, students and researchers involved in a broad range of fields, from synthetic green chemistry to medicinal chemistry and the chemistry of natural products. The connection between organoselenium compounds and green chemistry, despite having only recently emerged, is one of the subjects of this book. The first chapter highlights the use of Se-containing molecules as reagents and catalysts in new green protocols to access important organic transformations. The book provides a wealth of examples of bioactive Se-containing molecules, especially focusing on those with potential therapeutic uses. The second chapter focuses on the state of the art concerning the role of organoselenium compounds as antioxidants, GPx mimics, and derivatives endowed with different bioactive properties. “Organoselenium in nature” is the title of the third chapter, which equips readers with essential information on the main natural organoselenium compounds and where they are found. Selected aspects of the metabolism of selenium in plants and microorganisms are also discussed. In closing, the book includes a chapter dedicated to recent advances concerning the nonbonding interactions between organochalcogen compounds. This is currently a hot topic in selenium chemistry and biochemistry, and here readers will find key insights into the chalcogen bond and its role in the biological activity of organoselenium compounds.
Download or read book Non covalent Interactions in Quantum Chemistry and Physics written by Alberto Otero de la Roza and published by Elsevier. This book was released on 2017-06-15 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-covalent Interactions in Quantum Chemistry and Physics: Theory and Applications provides an entry point for newcomers and a standard reference for researchers publishing in the area of non-covalent interactions. Written by the leading experts in this field, the book enables experienced researchers to keep up with the most recent developments, emerging methods, and relevant applications. The book gives a comprehensive, in-depth overview of the available quantum-chemistry methods for intermolecular interactions and details the most relevant fields of application for those techniques. Theory and applications are put side-by-side, which allows the reader to gauge the strengths and weaknesses of different computational techniques. Summarizes the state-of-the-art in the computational intermolecular interactions field in a comprehensive work Introduces students and researchers from related fields to the topic of computational non-covalent interactions, providing a single unified source of information Presents the theoretical foundations of current quantum mechanical methods alongside a collection of examples on how they can be applied to solve practical problems
Download or read book The Crystal as a Supramolecular Entity written by Gautam R. Desiraju and published by John Wiley & Sons. This book was released on 2008-04-30 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supramolecular chemistry involves the study and synthesis of very large molecules which are used in complex chemical reactions, and have great potential in areas such as medicine, electronics, and optics. Offers a comprehensive overview of crystals and supramolecular entities.
Download or read book Principles of Molecular Recognition written by A.D. Buckingham and published by Springer Science & Business Media. This book was released on 1993-09-30 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of molecular recognition in chemistry and biology is reflected in a recent upsurge in relevant research, promoted in particular by high-profile initiatives in this area in Europe, the USA and Japan. Although molecular recognition is necessarily microscopic in origin, its consequences are de facto macroscopic. Accordingly, a text that starts with intermolecular interactions between simple molecules and builds to a discussion of molecular recognition involving larger scale systems is timely. This book was planned with such a development in mind. The book begins with an elementary but rigorous account of the various types of forces between molecules. Chapter 2 is concerned with the hydrogen bond between pairs of simple molecules in the gas phase, with particular reference to the preferred relative orientation of the pair and the ease with which this can be distorted. This microscopic view continues in chapter 3 wherein the nature of interactions between solute molecules and solvents or between two or more solutes is examined from the experimental standpoint, with various types of spectroscopy providing the probe of the nature of the interactions. Molecular recognition is central to the catalysis of chemical reactions, especially when bonds are to be broken and formed under the severe con straint that a specific configuration is to result, as in the production of enan tiotopically pure compounds. This important topic is considered in chapter 4.
