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Graphene Metal Interactions Beyond Van Der Waals Forces
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Book Synopsis Graphene-metal Interactions Beyond Van Der Waals Forces by : Haozhe Wang (Ph. D.)
Download or read book Graphene-metal Interactions Beyond Van Der Waals Forces written by Haozhe Wang (Ph. D.) and published by . This book was released on 2021 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: With extraordinary properties, graphene has been applied in various studies to explore new phenomena, new understandings, and new applications. With only one atomic layer thick and all its atoms are on the surface, graphene's properties could be altered by being brought into contact with any arbitrary surfaces, and similarly the close presence of graphene contact could change the properties of that surface as well. This thesis aims to provide insights into graphene-metal interactions by analyze novel phenomena and develop practical applications. First, we modified the graphene-copper interface to prevent the growths of thicker graphene islands in order to grow a uniform bilayer graphene (2LG), by introducing the concept of interface adhesive energy. To characterize the different types of 2LG better, we developed a machine-learning-assisted Raman analysis tool and confirmed that our FM-mode-grown 2LG is of quasi-AB-stacking. Taking advantage of the better mechanical properties of 2LG, a support-free, Marangoni-driven graphene transfer technique was developed. Next, we utilize the stability of Sn-graphene-Cu interfaces to develop an approach that allows for more reliable low-temperature bonding technology. The proposed bonding scheme inherently solves both high bonding temperature and interfacial diffusion issues. Specifically, the lowering of bonding temperature is achieved by introducing nano-cone features in the surface of the Cu side. A one-atomic-thick graphene interlayer on the Cu does not prevent the bonding between Cu and Sn, while preventing the atom diffusion to form the intermetallic compounds that are harmful for the reliability of the bonding. Finally, we examined graphene-metal interactions for the modification of optical properties in the graphene-aluminum and graphene-tin systems. The Sn nanodot arrays have a light-trapping effect on graphene, therefore, increases graphene absorption from 2% to 15% in spectral regime of [lambda] = 900-2000 nm. On the contrary, a counter-intuitive transmittance enhancement is observed in graphene-Al hetero-films. We find that the relative transmittance enhancement reaches up to 27% for 370nm incident light on an interface of graphene and 10nm-thick aluminum. These two examples reveal the fascinating aspect of how the interface between graphene and metal could bring about unexpected property alterations in either of the layer or the whole system together.
Book Synopsis 2D Monoelemental Materials (Xenes) and Related Technologies by : Zongyu Huang
Download or read book 2D Monoelemental Materials (Xenes) and Related Technologies written by Zongyu Huang and published by CRC Press. This book was released on 2022-04-19 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monoelemental 2D materials called Xenes have a graphene-like structure, intra-layer covalent bond, and weak van der Waals forces between layers. Materials composed of different groups of elements have different structures and rich properties, making Xenes materials a potential candidate for the next generation of 2D materials. 2D Monoelemental Materials (Xenes) and Related Technologies: Beyond Graphene describes the structure, properties, and applications of Xenes by classification and section. The first section covers the structure and classification of single-element 2D materials, according to the different main groups of monoelemental materials of different components and includes the properties and applications with detailed description. The second section discusses the structure, properties, and applications of advanced 2D Xenes materials, which are composed of heterogeneous structures, produced by defects, and regulated by the field. Features include: Systematically detailed single element materials according to the main groups of the constituent elements Classification of the most effective and widely studied 2D Xenes materials Expounding upon changes in properties and improvements in applications by different regulation mechanisms Discussion of the significance of 2D single-element materials where structural characteristics are closely combined with different preparation methods and the relevant theoretical properties complement each other with practical applications Aimed at researchers and advanced students in materials science and engineering, this book offers a broad view of current knowledge in the emerging and promising field of 2D monoelemental materials.
Book Synopsis 2d Inorganic Materials Beyond Graphene by : C N R Rao
Download or read book 2d Inorganic Materials Beyond Graphene written by C N R Rao and published by World Scientific. This book was released on 2017-08-28 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-dimensional materials have had widespread applications in nanoelectronics, catalysis, gas capture, water purification, energy storage and conversion. Initially based around graphene, research has since moved on to looking at alternatives, including transitions metal dichalcogenides, layered topological insulators, metallic mono-chalcogenides, borocarbonitrides and phosphorene.This book provides a review of research in the field of these materials, including investigation into their defects, analysis on hybrid structures focusing on their properties and synthesis, and characterization and applications of 2D materials beyond graphene. It is designed to be a single-point reference for students, teachers and researchers of chemistry and its related subjects, particularly in the field of nanomaterials.
Book Synopsis Optoelectronics of Graphene-based Van Der Waals Heterostructures by : Qiong Ma (Ph. D.)
Download or read book Optoelectronics of Graphene-based Van Der Waals Heterostructures written by Qiong Ma (Ph. D.) and published by . This book was released on 2016 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on van der Waals (vdW) materials (homo- or hetero-) is a rapidly emerging field in condensed matter physics. They are layered structures with strong chemical bonding within layers and relatively weak van der Waals force to combine layers together. This unique layer-bylayer nature makes it easy to exfoliate layers out and at the same time to re-assemble in arbitrary sequences with different combinations. The versatility, flexibility, and relatively low cost of production make the scientific community enthusiastic about their future. In this thesis, I investigate the fundamental physical processes of light-matter interactions in these layered structures, including graphene, boron nitride, transition metal dichalcogenides and heterostructures formed from these materials. My research involves state-of-the-art nanoscale fabrication and microscale photocurrent spectroscopy and imaging. In Chapter 1, 1 will briefly discuss basic physical properties of the vdW materials involved in this thesis and introduce the main nanofabrication and measurement techniques. Chapter 2-4 are about hot electron dynamics and electron-phonon coupling in intrinsic graphene systems, among which Chapter 2 is focusing on the generation mechanism of the photocurrent at the p-n interface, which is demonstrated to have a photothermoelectric origin. This indicates a weak electron-phonon coupling strength in graphene. Chapter 3 is a direct experimental follow-up of the work in Chapter 2 and reveals the dominant electron-phonon coupling mechanism at different temperature and doping regimes. In Chapter 4, I present the observation of anomalous geometric photocurrent patterns in various devices at the charge neutral point. The spatial pattern can be understood as a local photo-generated current near edges being collected by remote electrodes. The anomalous behavior as functions of change density and temperature indicates an interesting regime of energy and charge dynamics. In Chapter 5 and 6, 1 will show the photoresponse of graphene-BN heterostuctures. In graphene-BN stack directly on SiO2, we observed strong photo-induced doping phenomenon, which can be understood as charge transfer from graphene across BN and eventually trapped at the interface between BN and SiO2. By inserting another layer of graphene between BN and SiO2 , we can measure an electrical current after photoexcitation due to such charge transfer. We further studied the competition between this vertical charge transfer and in-plane carrier-carrier scattering in different regimes. In Chapter 7, I will briefly summarize collaborated work with Prof. Dimitri Basov's group on near-field imaging of surface polariton in two-dimensional materials. This technique provides a complementary tool to examine the intriguing light-matter interaction (for large momentum excitations) in low-dimensional materials. Chapter 8 is the outlook, from my own point of view, what more can be done following this thesis.
Book Synopsis Physics and Chemistry of Graphene by : Toshiaki Enoki
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.
Book Synopsis Graphene and Beyond: 2D Materials by : H. Grebel
Download or read book Graphene and Beyond: 2D Materials written by H. Grebel and published by The Electrochemical Society. This book was released on 2015-07-29 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 2D Materials: Chemistry and Applications (Part 1) by : Vinay Deep Punetha
Download or read book 2D Materials: Chemistry and Applications (Part 1) written by Vinay Deep Punetha and published by Bentham Science Publishers. This book was released on 2024-08-19 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2D Materials: Chemistry and Applications offers a concise exploration of the revolutionary 2D materials synthesis, their properties, and diverse applications. It presents information about graphene and other 2D materials like germanene and stanene, emphasizing their synthesis, functionalization, and technological use. The book chapters in part 1 cover the foundational aspects of graphene' structure and production techniques, highlighting their potential in areas like energy storage, drug delivery, and nanoelectronics. The book also explains the versatile applications of graphene-based nanocomposites, highlighting their multifunctional capabilities. Chapters also demonstrate the impact of functionalization on applications like biomedical imaging, microbial control, and environmental sustainability. The challenges and solutions concerning the toxicity of graphene-related materials are also highlighted. This book is a foundational resource for researchers, academics, and industry professionals in materials science, nanotechnology, chemistry, and environmental engineering on 2D materials.
Download or read book 2D Materials written by Phaedon Avouris and published by Cambridge University Press. This book was released on 2017-06-29 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn about the most recent advances in 2D materials with this comprehensive and accessible text. Providing all the necessary materials science and physics background, leading experts discuss the fundamental properties of a wide range of 2D materials, and their potential applications in electronic, optoelectronic and photonic devices. Several important classes of materials are covered, from more established ones such as graphene, hexagonal boron nitride, and transition metal dichalcogenides, to new and emerging materials such as black phosphorus, silicene, and germanene. Readers will gain an in-depth understanding of the electronic structure and optical, thermal, mechanical, vibrational, spin and plasmonic properties of each material, as well as the different techniques that can be used for their synthesis. Presenting a unified perspective on 2D materials, this is an excellent resource for graduate students, researchers and practitioners working in nanotechnology, nanoelectronics, nanophotonics, condensed matter physics, and chemistry.
Download or read book Graphene Chemistry written by De-en Jiang and published by John Wiley & Sons. This book was released on 2013-10-14 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.
Book Synopsis Characterization and Modification of Graphene-Based Interfacial Mechanical Behavior by : Guorui Wang
Download or read book Characterization and Modification of Graphene-Based Interfacial Mechanical Behavior written by Guorui Wang and published by Springer Nature. This book was released on 2020-08-21 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis shares new findings on the interfacial mechanics of graphene-based materials interacting with rigid/soft substrate and with one another. It presents an experimental platform including various loading modes that allow nanoscale deformation of atomically thin films, and a combination of atomic force microscopy (AFM) and Raman spectroscopy that allows both displacement and strain to be precisely measured at microscale. The thesis argues that the rich interfacial behaviors of graphene are dominated by weak van der Waals force, which can be effectively modulated using chemical strategies. The continuum theories are demonstrated to be applicable to nano-mechanics and can be used to predict key parameters such as shear/friction and adhesion. Addressing key interfacial mechanics issues, the findings in thesis not only offer quantitative insights in the novel features of friction and adhesion to be found only at nanoscale, but will also facilitate the deterministic design of high-performance graphene-based nanodevices and nanocomposites.
Book Synopsis Introduction to Graphene-Based Nanomaterials by : Luis E. F. Foa Torres
Download or read book Introduction to Graphene-Based Nanomaterials written by Luis E. F. Foa Torres and published by Cambridge University Press. This book was released on 2020-01-30 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene is one of the most intensively studied materials, and has unusual electrical, mechanical and thermal properties, which provide almost unlimited potential applications. This book provides an introduction to the electrical and transport properties of graphene and other two-dimensional nanomaterials, covering ab-initio to multiscale methods. Updated from the first edition, the authors have added chapters on other two-dimensional materials, spin-related phenomena, and an improved overview of Berry phase effects. Other topics include powerful order N electronic structure, transport calculations, and ac transport and multiscale transport methodologies. Chapters are complemented with concrete examples and case studies, questions and exercises, detailed appendices and computational codes. It is a valuable resource for graduate students and researchers working in physics, materials science or engineering who are interested in the field of graphene-based nanomaterials.
Download or read book Xenes written by Alessandro Molle and published by Woodhead Publishing. This book was released on 2022-06-29 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Xenes: 2D Synthetic Materials Beyond Graphene includes all the relevant information about Xenes thus far reported, focusing on emerging materials and new trends. The book's primary goal is to include full descriptions of each Xene type by leading experts in the area. Each chapter will provide key principles, theories, methods, experiments and potential applications. The book also reviews the key challenges for synthetic 2D materials such as characterization, modeling, synthesis, and integration strategies. This comprehensive book is suitable for materials scientists and engineers, physicists and chemists working in academia and R&D in industry. The discovery of silicene dates back to 2012. Since then, other Xenes were subsequently created with synthetic methods. The portfolio of Xenes includes different chemical elements of the periodic table and hence the related honeycomb-like lattices show a wealth of electronic and optical properties that can be successfully exploited for applications. Introduces the most important Xenes, including silicene, germanene, borophene, gallenene, phosphorene, and more Provides the fundamental principles, theories, experiments and applications for the most relevant synthetic 2D materials Addresses techniques for the characterization, synthesis and integration of synthetic 2D materials
Book Synopsis Advances in Contact Angle, Wettability and Adhesion, Volume 4 by : K. L. Mittal
Download or read book Advances in Contact Angle, Wettability and Adhesion, Volume 4 written by K. L. Mittal and published by John Wiley & Sons. This book was released on 2019-10-16 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the fourth volume in the series "Advances in Contact Angle, Wettability and Adhesion" initiated to consolidate information and provide commentary on certain recent research aspects dealing with this important topic. Its predecessor Volumes 1, 2 and 3 were published in 2013, 2015 and 2018 respectively. This new book comprising 14 research and review articles is divided into four parts: Part 1: Contact Angle and Wettability Aspects; Part 2: Surface Free Energy and Surface Tension Determination; Part 3: Applied Aspects. The topics covered include: Contact Angle Determination of Talc Powders from Heat of Immersion Surface Wetting at Macro and Nanoscale Wettability of Wood Surfaces with Waterborne Acrylic Lacquer Stains Modulated by DBD Plasma Treatment in Air at Atmospheric Pressure Wettability of Ultrafiltration Membranes Determination of the Surface Free Energy of Solid Surfaces: Can the Best Model be Found Surface Free Energy Characterization of Talc Powders Determination of the Surface Free Energy of Skin and the Factors Affecting it by the Contact Angle Method Determination of Surface Tension Components of Aqueous Solutions using Fomblin HC/25 R Perfluoropolyether Liquid Film as a Solid Substrate Enhancing the Wettability of Polybenzimidazole (PBI) to Improve Fuel Cell Performance Evaluation of Sebum Resistance for Long-Wear Face Make-Up Products Using Contact Angle Measurements Contact Angle Hysteresis of Pressure-Sensitive Adhesives due to Adhesion Tension Relaxation The Potential of Surface Nano-Engineering and Superhydrophobic Surfaces in Drag Reduction Laser Surface Engineering of Polymeric Materials for Enhanced Mesenchymal Stem Cell Adhesion and Growth Sisal-Green Resin Interfaces in Green Composites.
Book Synopsis Handbook of Graphene by : Sulaiman Wadi Harun
Download or read book Handbook of Graphene written by Sulaiman Wadi Harun and published by John Wiley & Sons. This book was released on 2019-06-12 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The seventh volume in a series of handbooks on graphene research and applications The Handbook of Graphene, Volume 7: Biomaterials presents an overview of various graphene research initiatives and specific biomedical applications, where the properties of graphene are used differently. The book shares information on how graphene and graphene-based materials are utilized for the following types of applications: bio-targeting; medical and biomedical; drug delivery; antibacterial; and biological, biosensing and bioimaging. Topics covered include the role of graphene-based materials in: regenerative medicine; resistive memories and transistors; and implants in biomedicine. The impact of graphene-based biomaterials on biomedical applications is discussed, as are graphene-based systems in the delivery of therapeutics to the brain and central nervous system.
Book Synopsis Electronic Properties of Graphene Functionalized with 2D Molecular Assemblies by : Mali Zhao
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.
Book Synopsis Tribology of Graphene by : Oleksiy Penkov
Download or read book Tribology of Graphene written by Oleksiy Penkov and published by Elsevier. This book was released on 2020-01-08 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tribology of Graphene: Simulation Methods, Preparation Methods, and Their Applications provides an exhaustive reference guide on the tribology of graphene-based materials. The book begins with a discussion on the selection of the proper graphene-based material and then segues into how to choose a deposition method, how to control of its structure and properties, and the most effective working conditions and applications. The latest developments in theoretical simulations of graphene friction, preparation methods, and effective applications are all reviewed, as are the ways various graphene coatings can be successfully employed to decrease friction and wear in nano-, micro- and macro-mechanical applications. Synthesizes the broad current research in tribological applications of graphene all in one place Covers theoretical simulations and preparation methods, including insights on how to put them into practice, allowing for quicker and more effective selection of graphene-based material Provides a broader perspective by discussing both graphene-based composites and additives
Book Synopsis CMOS and Beyond by : Tsu-Jae King Liu
Download or read book CMOS and Beyond written by Tsu-Jae King Liu and published by Cambridge University Press. This book was released on 2015-02-05 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get up to speed with the future of logic switch design with this indispensable overview of the most promising successors to modern CMOS transistors. Learn how to overcome existing design challenges using novel device concepts, presented using an in-depth, accessible, tutorial-style approach. Drawing on the expertise of leading researchers from both industry and academia, and including insightful contributions from the developers of many of these alternative logic devices, new concepts are introduced and discussed from a range of different viewpoints, covering all the necessary theoretical background and developmental context. Covering cutting-edge developments with the potential to overcome existing limitations on transistor performance, such as tunneling field-effect transistors (TFETs), alternative charge-based devices, spin-based devices, and more exotic approaches, this is essential reading for academic researchers, professional engineers, and graduate students working with semiconductor devices and technology.
