Download or read book Tailoring Electronic Structure and Properties of Graphene Using Functional Organic Molecules written by and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific and technological interest in graphene has rapidly grown because of the outstanding physical and electronic properties of this two-dimensional material. To fully realize its technological potential, it is important to engineer a band gap as well as the charge carrier concentration through doping. In this thesis, we present routes to address both these aspects. Graphene is a semimetal and therefore it does not have a technologically relevant band gap. To address this problem, it has been shown that sub-20 nm patterning can be used to open up a band gap in graphene through the quantum confinement effect. We present approaches for creating semiconducting nanoperforated graphene and graphene nanoribbons using block copolymer lithography, which addresses all of the following challenges simultaneously: (i) scalability, (ii) compatibility with the current manufacturing processes, (iii) high resolution, and (iv) pattern fidelity. By developing the materials and processes for the fabrication of sub-10 nm features over large areas, we study the structure-property relationships in nanopatterned graphene as a function of constriction width. We examine the limitations of top-down etching based fabrication methods in detail by examining the edge defect structures through Raman spectroscopy and electronic transport characterizations. These studies underline the importance of edge structure engineering in combination with patterning techniques to attain high quality semiconducting graphene. In the second part of the thesis, we demonstrate a strategy to effectively control doping in graphene without degradation of the electronic properties. We do so by noncovalently latching a photoisomerizable dipolar azobenzene derivative to graphene via [pi]-[pi] interaction to create stable chromophore/graphene hybrids. A reversible molecular transformation triggered by light was used as an additional handle to reversibly modulate charge carrier concentration while retaining high mobility of pristine graphene. As the molecules switch reversibly from trans to cis upon UV light illumination, the dipole moment changes, hence the extent of doping in graphene. Through experimental and theoretical studies, we develop mechanistic insight into the observed enhancement of Raman intensity from the chromophore attached to graphene.

Download or read book Graphene Chemistry written by De-en Jiang and published by John Wiley & Sons. This book was released on 2013-08-12 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: What are the chemical aspects of graphene as a novel 2D material and how do they relate to the molecular structure? This book addresses these important questions from a theoretical and computational standpoint. Graphene Chemistry: Theoretical Perspectives presents recent exciting developments to correlate graphene’s properties and functions to its structure through state-of-the-art computational studies. This book focuses on the chemistry aspect of the structure-property relationship for many fascinating derivatives of graphene; various properties such as electronic structure, magnetism, and chemical reactivity, as well as potential applications in energy storage, catalysis, and nanoelectronics are covered. The book also includes two chapters with significant experimental portions, demonstrating how deep insights can be obtained by joint experimental and theoretical efforts. Topics covered include: Graphene ribbons: Edges, magnetism, preparation from unzipping, and electronic transport Nanographenes: Properties, reactivity, and synthesis Clar sextet rule in nanographene and graphene nanoribbons Porous graphene, nanomeshes, and graphene-based architecture and assemblies Doped graphene: Theory, synthesis, characterization and applications Mechanisms of graphene growth in chemical vapor deposition Surface adsorption and functionalization of graphene Conversion between graphene and graphene oxide Applications in gas separation, hydrogen storage, and catalysis Graphene Chemistry: Theoretical Perspectives provides a useful overview for computational and theoretical chemists who are active in this field and those who have not studied graphene before. It is also a valuable resource for experimentalist scientists working on graphene and related materials, who will benefit from many concepts and properties discussed here.

Download or read book Graphene written by C. N. R. Rao and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its discovery in 2004, graphene has been a great sensation due to its unique structure and unusual properties, and it has only taken 6 years for a Noble Prize to be awarded for the field of graphene research. This monograph gives a well-balanced overview on all areas of scientific interest surrounding this fascinating nanocarbon. In one handy volume it offers comprehensive coverage of the topic, including chemical, materials science, nanoscience, physics, engineering, life science, and potential applications. Other graphene-like, inorganic layered materials are also discussed. Edited by two highly honored scientists, this is an invaluable companion for inorganic, organic, and physical chemists, materials scientists, and physicists. From the Contents: * Synthesis, Characterization, and Selected Properties of Graphene * Understanding Graphene via Raman Scattering * Physics of Quanta and Quantum Fields in Graphene * Graphene and Graphene-Oxide-Based Materials for Electrochemical Energy Systems * Heterogeneous Catalysis by Metal Nanoparticles supported on Graphene * Graphenes in Supramolecular Gels and in Biological Systems and many more

Download or read book Graphene And Its Fascinating Attributes written by Swapan K Pati and published by World Scientific. This book was released on 2011-03-24 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene, a single sheet of graphite, has an unconventional electronic structure that can be described in terms of massless Dirac Fermions. This interesting electronic feature is not only an important fundamental issue in condensed matter physics but also holds future promise in post-Si electronic/spintronics device applications.Graphene is the most fundamental building block, with which a variety of carbon-based materials such as graphite, fullerene and carbon nanotubes can be created. The diverse chemical, electronic and magnetic properties of nanographene and graphene are mainly due to their geometrical electronic structure. This book presents the frontiers of graphene research ranging from important issues in condensed matter physics and chemistry to advanced device applications.

Download or read book Physics and Chemistry of Graphene written by Toshiaki Enoki and published by CRC Press. This book was released on 2013-01-24 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: From a chemistry aspect, graphene is the extrapolated extreme of condensed polycyclic hydrocarbon molecules to infinite size. Here, the concept on aromaticity which organic chemists utilize is applicable. Interesting issues appearing between physics and chemistry are pronounced in nano-sized graphene (nanographene), as we recognize the importance of the shape of nanographene in understanding its electronic structure. In this book, the fundamental issues on the electronic, magnetic, and chemical properties of condensed polycyclic hyodrocarbon molecules, nanographene and graphene are comprehensively discussed.

Download or read book Graphene written by Farzad Ebrahimi and published by BoD – Books on Demand. This book was released on 2015-11-25 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a result of contributions of experts from the international scientific community working in different aspects of graphene science and applications and reports on the state-of-the-art research and development findings on graphene through original and innovative research studies. Through its seven chapters, the reader will have access to works related to the theory and characterization of various planar heterostructures and nanoplatforms based on graphene and also the Compton effect in graphene, while it introduces photoactive graphene from functionalization to applications and also the modeling and control of a smart single-layer graphene sheet. Besides, it presents reviews on the modeling, synthesis, and properties of graphene and graphene technology and its applications in electronic devices.

Download or read book Graphene Science Handbook written by Mahmood Aliofkhazraei and published by CRC Press. This book was released on 2016-04-21 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the Low Resistivity, High Mobility, and Zero Bandgap of GrapheneThe Graphene Science Handbook is a six-volume set that describes graphene's special structural, electrical, and chemical properties. The book considers how these properties can be used in different applications (including the development of batteries, fuel cells, photovoltaic

Download or read book Physics and Chemistry of Graphene Second Edition written by Toshiaki Enoki and published by CRC Press. This book was released on 2019-11-01 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene has been attracting growing attentions in physics, chemistry, and device applications after the discovery of micromechanically cleaved graphene sheet by A. Geim and K. Novoselov, who were awarded the 2010 Nobel Prize in Physics. The electronic structure of graphene, which is described in terms of massless Dirac fermions, brings about unconventional electronic properties, which are not only an important basic issue in condensed matter physics but also a promising target of cutting-edge electronics/spintronics device applications. Meanwhile, from chemistry aspect, graphene is the extreme of condensed polycyclic hydrocarbon molecules extrapolated to infinite size. Here, the concept on aromaticity, which organic chemists utilize, is applicable. Interesting issues appearing between physics and chemistry are pronounced in nanosized graphene (nanographene), as we recognize the importance of the shape of nanographene in understanding its electronic structure. This book comprehensively discusses the fundamental issues related to the electronic, magnetic, and chemical properties of condensed polycyclic hyodrocarbon molecules, nanographene, and graphene.

Download or read book Graphene Science Handbook Six Volume Set written by Mahmood Aliofkhazraei and published by CRC Press. This book was released on 2016-04-26 with total page 3379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene is the strongest material ever studied and can be an efficient substitute for silicon. This six-volume handbook focuses on fabrication methods, nanostructure and atomic arrangement, electrical and optical properties, mechanical and chemical properties, size-dependent properties, and applications and industrialization. There is no other major reference work of this scope on the topic of graphene, which is one of the most researched materials of the twenty-first century. The set includes contributions from top researchers in the field and a foreword written by two Nobel laureates in physics. Volumes in the set: K20503 Graphene Science Handbook: Mechanical and Chemical Properties (ISBN: 9781466591233) K20505 Graphene Science Handbook: Fabrication Methods (ISBN: 9781466591271) K20507 Graphene Science Handbook: Electrical and Optical Properties (ISBN: 9781466591318) K20508 Graphene Science Handbook: Applications and Industrialization (ISBN: 9781466591332) K20509 Graphene Science Handbook: Size-Dependent Properties (ISBN: 9781466591356) K20510 Graphene Science Handbook: Nanostructure and Atomic Arrangement (ISBN: 9781466591370)

Download or read book Supramolecular Chemistry of Fullerenes and Carbon Nanotubes written by Nazario Martin and published by John Wiley & Sons. This book was released on 2012-05-21 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collating our current knowledge and the latest developments for enabling breakthrough discoveries, this book focuses on the synthesis and applications of materials that are based on supramolecular assemblies of carbon nanostructures, with an emphasis on fullerenes and nanotubes. In so doing, it provides readers with an overview of the different types of supramolecular architectures, accentuating the outstanding geometrical, electronic and photophysical properties of the building blocks and the resulting structures. It makes use of basic concepts and real-life applications -- from simple syntheses to complex architectures, from instructive examples to working experimental procedures, and from photophysics to solar cells. A large part of each chapter is devoted to the methods and possibilities of controlling and tuning these molecular assemblies in order to obtain working devices. Fascinating reading for materials scientists, organic chemists, molecular physicists, and those in the semiconductor industry.

Download or read book Semiconducting Fibers written by Ram K. Gupta and published by CRC Press. This book was released on 2024-08-23 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconducting Fibers: Preparation, Advances, and Applications is a comprehensive study of the properties and emerging applications of semiconducting fibers. These nanomaterials have unique optoelectronic properties: they are flexible, one-dimensional, and lightweight, and can grow in bulk, thin films, and nano-dimensions (0D, 1D, 2D, 3D). Written by experts from around the world, this book covers the fundamentals of semiconducting fibers, their fabrication, and emerging applications in electronics, optoelectronics, energy, and healthcare. Various approaches to fabricating semiconducting fibers, their characteristics, and the working principles of nano-dimensional devices are covered. Key features: Expert scientists across the world present state-of-the-art progress on semiconducting fibers for emerging applications, including flexible and wearable electronics Provides details of novel methods and advanced technologies used in energy applications of semiconducting fibers Provides fundamentals of electrochemical behavior and their understanding of optoelectronics, photovoltaics, batteries, fuel cells, sensors, and supercapacitors Presents fabrication, characterization, and applications of semiconducting fibers for energy conversion and storage This book will be a key resource for students, academics, and industry professionals interested in the fabrication, device technologies, and applications of semiconducting fibers.

Download or read book Functionalizing Graphene and Carbon Nanotubes written by Filipe Vargas Ferreira and published by Springer. This book was released on 2016-08-22 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book compiles all current information on the different types of functionalization of carbon nanotubes (CNTs) and graphene, both covalent and non-covalent. The book starts with a general overview of the synthesis, characterization and application of functionalized CNTs and graphene. Special attention is dedicated to the characterization of functionalized materials, a topic rarely addressed on the literature. The authors provide a comparison between the functionalization of these two types of carbon materials.

Download or read book Encyclopedia of Interfacial Chemistry written by and published by Elsevier. This book was released on 2018-03-29 with total page 5276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry, Seven Volume Set summarizes current, fundamental knowledge of interfacial chemistry, bringing readers the latest developments in the field. As the chemical and physical properties and processes at solid and liquid interfaces are the scientific basis of so many technologies which enhance our lives and create new opportunities, its important to highlight how these technologies enable the design and optimization of functional materials for heterogeneous and electro-catalysts in food production, pollution control, energy conversion and storage, medical applications requiring biocompatibility, drug delivery, and more. This book provides an interdisciplinary view that lies at the intersection of these fields. Presents fundamental knowledge of interfacial chemistry, surface science and electrochemistry and provides cutting-edge research from academics and practitioners across various fields and global regions

Download or read book Nanostructured Materials for Electronic Nose written by Nirav J. Joshi and published by Springer Nature. This book was released on with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electronic Properties of Graphene Functionalized with 2D Molecular Assemblies written by Mali Zhao and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene has extraordinary properties because of its linear band structure and zero band gap. However, the lack of a band gap hinders the implementation of graphene in electronics; tuning the band gap of graphene would enable a precise control of the charge carriers. One of the promising solutions is to modify graphene with organic molecular building blocks. Organic molecules with a metal ion (metal- porphyrin, metal- phthalocyanine) are potential candidates, because of their robust structure and the fact that their charge and spin properties can be tuned. In this thesis, graphene was prepared by sublimating Si atoms from both Si and C- terminated SiC substrates. Three molecules which carry different spin information were studied by STM experiments. Through collaborations, DFT calculations were used to improve our understanding of the molecule- graphene interaction.The first molecule used in our experiment is Ni- phthalocyanine (NiPc). The Ni2+ ion has a 3d8 electron configuration, giving a spin- state of 0. The second molecule is Pt- tetraphenylporphyrin (PtTPP(CO2Me)4). The Pt2+ ion also shows a d8 electron configuration with a spin state of zero. However, the Pt atom is heavier than Ni, which should increase the spin- orbit effects. The third molecule is tetraphenylporphyrin iron(III) chloride (Fe(TPP)Cl). The Fe3+ in Fe(TPP)Cl is stable in the high spin state (S=5/2). These three molecules each form well- ordered nearly square lattice molecular networks on graphene. The molecular lattice directions are dominated by the graphene symmetry, while the molecular orientations depend on the molecule- molecule interactions. The electronic couplings between each of three molecules and graphene are via the Van der Waals forces, which gives rise to the capacitive molecular- layer/ graphene interfaces. The electronic interactions between FeTPP molecules and graphene are stronger than those between NiPc or PtTPP molecules and graphene. The studies of the organic molecules with different spin information on the graphene has the potential to pave the way for the application of organometallic molecules/graphene interface in spintronic devices.

Download or read book Biocompatible Graphene for Bioanalytical Applications written by Yuwei Hu and published by Springer. This book was released on 2014-12-04 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the latest advances in the use of graphene and bio-compatible-material-decorated graphene to detect various targets (e.g. DNA, RNA, amino acids, peptides, proteins, enzymes, antigens, glucose, DA, AA, UA, ATP, NADH, gas, ions, etc.). It focuses on the specific interaction of these substances with graphene (or modified graphene) and the efficient transduction of the target recognition event into detectable signals via various techniques. Particular emphasis is given to well-designed strategies for constructing graphene-based platforms and target determination. It also covers other bio-analytical applications including cellular imaging, drug delivery and bacteria inhibition, before turning to a discussion of future challenges and prospects of graphene in bio-analytical applications. This book is intended for researchers working in the fields of analytical chemistry, nanomaterials and biomedical engineering. Li Niu is a Professor at the State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences.

Download or read book Electronic and Thermal Properties of Graphene written by Kyong Yop Rhee and published by Mdpi AG. This book was released on 2020-07 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue includes recent research articles and extensive reviews on graphene-based next-generation electronics, bringing together perspectives from different branches of science and engineering. The papers presented in this volume cover experimental, computational and theoretical aspects of the electrical and thermal properties of graphene and its applications in batteries, electrodes, sensors and ferromagnetism. In addition, this Special Issue covers many important state-of-the-art technologies and methodologies regarding the synthesis, fabrication, characterization and applications of graphene-based nanocomposites.