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Author : Timothy John Pennycook
Publisher :
ISBN 13 :
Total Pages : 113 pages
Book Rating : 4.:/5 (773 download)
Download or read book Density Functional Theory and Scanning Transmission Electron Microscopy written by Timothy John Pennycook and published by . This book was released on 2012 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karen Andre Mkhoyan
Publisher :
ISBN 13 :
Total Pages : 420 pages
Book Rating : 4.E/5 ( download)
Download or read book Scanning Transmission Electron Microscopy Study of III-V Nitrides written by Karen Andre Mkhoyan and published by . This book was released on 2004 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nobuo Tanaka
Publisher :
ISBN 13 : 9781848167902
Total Pages : 616 pages
Book Rating : 4.1/5 (679 download)
Download or read book Scanning Transmission Electron Microscopy of Nanomaterials written by Nobuo Tanaka and published by . This book was released on 2014-09-06 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basics, present status and future prospects of high-resolution scanning transmission electron microscopy (STEM) are described in the form of a textbook for advanced undergraduates and graduate students. This volume covers recent achievements in the field of STEM obtained with advanced technologies such as spherical aberration correction, monochromator, high-sensitivity electron energy loss spectroscopy and the software of image mapping. The future prospects chapter also deals with z-slice imaging and confocal STEM for 3D analysis of nanostructured materials. Contents: Introduction (N Tanaka); Historical Survey of the Development of STEM Instruments (N Tanaka); Basic Knowledge of STEM: Basics of STEM (N Tanaka and K Saitoh); Application of STEM to Nanomaterials and Biological Specimens (N Shibata, S D Findlay, Y Ikuhara and N Tanaka); Theories of STEM Imaging: Theory for HAADF-STEM and Its Image Simulation (K Watanabe); Theory for Annular Bright Field STEM Imaging (S D Findlay, N Shibata and Y Ikuhara); Electron Energy-Loss Spectroscopy in STEM and Its Imaging (K Kimoto); Density Functional Theory for ELNES in STEM-EELS (T Mizoguchi); Advanced Methods in STEM: Aberration Correction in STEM (H Sawada); Secondary Electron Microscopy in STEM (H Inada and Y Zhu); Scanning Confocal Electron Microscopy (K Mitsuishi and M Takeguchi); Electron Tomography in STEM (N Tanaka); Electron Holography and Lorentz Electron Microscopy in STEM (N Tanaka); Recent Topics and Future Prospects in STEM (N Tanaka). Readership: Graduate students and researchers in the field of nanomaterials and nanostructures. Key Features: Most advanced; befitting beginning graduate students; Very convenient for advanced researchers who would like to use STEM and have a comprehensive understanding of the theory of image contrast and application details; Spans from the basic theory to the applications of STEM
Author : Junhao Lin
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (919 download)
Download or read book Revealing Structure-property Correlations in 2D Layered Materials Using Synergistic Combination of Electron Microscopy and Atomic-scale Calculations written by Junhao Lin and published by . This book was released on 2015 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nobuo Tanaka
Publisher :
ISBN 13 : 9781848167896
Total Pages : 571 pages
Book Rating : 4.1/5 (678 download)
Download or read book Scanning Transmission Electron Microscopy of Nanomaterials written by Nobuo Tanaka and published by . This book was released on 2014 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basics, present status and future prospects of high-resolution scanning transmission electron microscopy (STEM) are described in the form of a textbook for advanced undergraduates and graduate students. This volume covers recent achievements in the field of STEM obtained with advanced technologies such as spherical aberration correction, monochromator, high-sensitivity electron energy loss spectroscopy and the software of image mapping. The future prospects chapter also deals with z-slice imaging and confocal STEM for 3D analysis of nanostructured materials.
Author : Nobuo Tanaka
Publisher : World Scientific
ISBN 13 : 1783264713
Total Pages : 616 pages
Book Rating : 4.7/5 (832 download)
Download or read book Scanning Transmission Electron Microscopy Of Nanomaterials: Basics Of Imaging And Analysis written by Nobuo Tanaka and published by World Scientific. This book was released on 2014-08-21 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basics, present status and future prospects of high-resolution scanning transmission electron microscopy (STEM) are described in the form of a textbook for advanced undergraduates and graduate students. This volume covers recent achievements in the field of STEM obtained with advanced technologies such as spherical aberration correction, monochromator, high-sensitivity electron energy loss spectroscopy and the software of image mapping. The future prospects chapter also deals with z-slice imaging and confocal STEM for 3D analysis of nanostructured materials.
Author : Weronika Walkosz
Publisher : Springer Science & Business Media
ISBN 13 : 1441978178
Total Pages : 114 pages
Book Rating : 4.4/5 (419 download)
Download or read book Atomic Scale Characterization and First-Principles Studies of Si3N4 Interfaces written by Weronika Walkosz and published by Springer Science & Business Media. This book was released on 2011-04-06 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents results from a combined atomic-resolution Z-contrast and annular bright-field imaging and electron energy loss spectroscopy in the Scanning Transmission Electron Microscopy, as well as first principles studies of the interfaces between crystalline β−Si3N4 and amorphous (i) CeO2-x as well as (ii) SiO2 intergranular film (IGF). These interfaces are of a great fundamental and technological interest because they play an important role in the microstructural evolution and mechanical properties of Si3N4 ceramics used in many high temperature and pressure applications. The main contribution of this work is its detailed description of the bonding characteristics of light atoms, in particular oxygen and nitrogen, at these interfaces, which has not been achieved before. The atomic-scale information on the arrangement of both light and heavy atoms is critical for realistic modeling of interface properties, such as interface strength and ion transport, and will facilitate increased control over the performance of ceramic and semiconductor materials for a wide-range of applications.
Author : Stephen J. Pennycook
Publisher : Springer Science & Business Media
ISBN 13 : 1441972005
Total Pages : 764 pages
Book Rating : 4.4/5 (419 download)
Download or read book Scanning Transmission Electron Microscopy written by Stephen J. Pennycook and published by Springer Science & Business Media. This book was released on 2011-03-24 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scanning transmission electron microscopy has become a mainstream technique for imaging and analysis at atomic resolution and sensitivity, and the authors of this book are widely credited with bringing the field to its present popularity. Scanning Transmission Electron Microscopy(STEM): Imaging and Analysis will provide a comprehensive explanation of the theory and practice of STEM from introductory to advanced levels, covering the instrument, image formation and scattering theory, and definition and measurement of resolution for both imaging and analysis. The authors will present examples of the use of combined imaging and spectroscopy for solving materials problems in a variety of fields, including condensed matter physics, materials science, catalysis, biology, and nanoscience. Therefore this will be a comprehensive reference for those working in applied fields wishing to use the technique, for graduate students learning microscopy for the first time, and for specialists in other fields of microscopy.
Author : Alina Bruma
Publisher : CRC Press
ISBN 13 : 0429516169
Total Pages : 162 pages
Book Rating : 4.4/5 (295 download)
Download or read book Scanning Transmission Electron Microscopy written by Alina Bruma and published by CRC Press. This book was released on 2020-12-22 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scanning Transmission Electron Microscopy: Advanced Characterization Methods for Materials Science Applications The information comprised in this book is focused on discussing the latest approaches in the recording of high-fidelity quantitative annular dark-field (ADF) data. It showcases the application of machine learning in electron microscopy and the latest advancements in image processing and data interpretation for materials notoriously difficult to analyze using scanning transmission electron microscopy (STEM). It also highlights strategies to record and interpret large electron diffraction datasets for the analysis of nanostructures. This book: Discusses existing approaches for experimental design in the recording of high-fidelity quantitative ADF data Presents the most common types of scintillator-photomultiplier ADF detectors, along with their strengths and weaknesses. Proposes strategies to minimize the introduction of errors from these detectors and avenues for dealing with residual errors Discusses the practice of reliable multiframe imaging, along with the benefits and new experimental opportunities it presents in electron dose or dose-rate management Focuses on supervised and unsupervised machine learning for electron microscopy Discusses open data formats, community-driven software, and data repositories Proposes methods to process information at both global and local scales, and discusses avenues to improve the storage, transfer, analysis, and interpretation of multidimensional datasets Provides the spectrum of possibilities to study materials at the resolution limit by means of new developments in instrumentation Recommends methods for quantitative structural characterization of sensitive nanomaterials using electron diffraction techniques and describes strategies to collect electron diffraction patterns for such materials This book helps academics, researchers, and industry professionals in materials science, chemistry, physics, and related fields to understand and apply computer-science–derived analysis methods to solve problems regarding data analysis and interpretation of materials properties.
Author : DFTEM (2006, Wien)
Publisher :
ISBN 13 : 9783902548009
Total Pages : 209 pages
Book Rating : 4.5/5 (48 download)
Download or read book DFTEM 2006 - Bringing Together Two Communities written by DFTEM (2006, Wien) and published by . This book was released on 2006 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jian Min Zuo
Publisher : Springer
ISBN 13 : 1493966073
Total Pages : 741 pages
Book Rating : 4.4/5 (939 download)
Download or read book Advanced Transmission Electron Microscopy written by Jian Min Zuo and published by Springer. This book was released on 2016-10-26 with total page 741 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume expands and updates the coverage in the authors' popular 1992 book, Electron Microdiffraction. As the title implies, the focus of the book has changed from electron microdiffraction and convergent beam electron diffraction to all forms of advanced transmission electron microscopy. Special attention is given to electron diffraction and imaging, including high-resolution TEM and STEM imaging, and the application of these methods to crystals, their defects, and nanostructures. The authoritative text summarizes and develops most of the useful knowledge which has been gained over the years from the study of the multiple electron scattering problem, the recent development of aberration correctors and their applications to materials structure characterization, as well as the authors' extensive teaching experience in these areas. Advanced Transmission Electron Microscopy: Imaging and Diffraction in Nanoscience is ideal for use as an advanced undergraduate or graduate level text in support of course materials in Materials Science, Physics or Chemistry departments.
Author : Saiphaneendra Bachu
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (138 download)
Download or read book Probing the Interfaces in Two-dimensional Heterostructures Using Advanced Transmission Electron Microscopy written by Saiphaneendra Bachu and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-dimensional (2D) heterostructures made of graphene and transition metal dichalcogenides (TMDs) attract huge research interest because they offer wide variety of band structures and are suitable for multicomponent semiconductor device applications. However, the properties of these heterostructures are highly dependent on the characteristics of the interface formed between the constituent 2D layers. So, it is imperative to investigate the interface structure, defects and possible relaxation effects at different length scales and correlate them with the synthesis and the properties of the heterostructures. To that end, this dissertation investigates the interfaces in three heterostructure systems, namely WSe2/graphene vertical heterostructures, ReS2/MoS2 vertical and in-plane heterostructures and MoSe2/WSe2 nanodot/matrix in-plane heterostructures, using advanced transmission electron microscopy and spectroscopy techniques. The first chapter briefly introduces the 2D materials and the two types of heterostructure geometries. It also highlights the importance of probing the interfaces in 2D heterostructures and how that is crucial to understanding and controlling the properties of the 2D heterostructures. The second chapter describes various experimental procedures utilized in the dissertation such as the synthesis of heterostructures using chemical vapor deposition (CVD) processes, various scanning/transmission electron microscopy (S/TEM) techniques and the associated sample preparation methods. The third chapter presents a detailed investigation of how the microstructure of bilayer graphene can have a profound effect on the nucleation of WSe2 overlayers towards the formation of WSe2/graphene vertical heterostructures. Through the combination of S/TEM experiments and ReaxFF force field molecular dynamics simulations, we uncover a high density of interlayer dislocations in Bernal-staked bilayer graphene leading to a significantly high nucleation density of WSe2 islands. Surprisingly, we observe WSe2 nucleation to be heavily suppressed in twisted bilayer graphene due to the lack of interlayer dislocations. We show that strain relaxation driven by strong interlayer coupling in Bernal-stacked bilayer graphene promotes the formation of these interlayer dislocations and localized buckling. Our simulations further show that these localized buckles in graphene serve as thermodynamically favorable sites for binding WSex molecules and could drive the higher nucleation density of WSe2 on Bernal-stacked graphene. The fourth chapter reports the synthesis of ReS2/MoS2 vertical and in-plane heterostructures using a two-step CVD process, in which triclinic ReS2 is anisotropic and hexagonal MoS2 is isotropic. Using a combination of S/TEM characterization and density functional theory (DFT) calculations, we investigated the nature of structural relaxations in ReS2 at the interface. In the vertical heterostructures, we observed the ReS2 undergoes stacking stabilizations at the atomic scale, Re chain rotations at the nanometer scale and domain inversions at the sub-micron scale, towards exhibiting a mesoscale quasi-epitaxy with the MoS2 underneath. In the in-plane heterostructures, ReS2 attempts to adopt the isotropic hexagonal structure of the MoS2 close to the interface by distorting its chain-like structure. Away from the interface, the ReS2 retains its triclinic chain-like structure and consequently induces an overall rotational misorientation of 5-6° with respect to the MoS2 lattice. The fifth chapter utilizes cathodoluminescence (CL)-in-STEM to experimentally prove that it is possible to realize localized light emission from MoSe2/WSe2 nanodot/matrix in-plane heterostructures where the MoSe2 nanodots are embedded in the WSe2 matrix. Furthermore, it is observed that the light emission originates from the MoSe2 excitons in nanodots larger than 85 nm. However, at smaller nanodot sizes, the interface excitons, formed by the electrons from MoSe2 and the holes from the WSe2, dominate the light emission. And, when the nanodot size goes below a critical value, the electron energy levels in the nanodot become quantized and induces a blue shift to the light emission. The sixth chapter concludes the observations from all the earlier chapters and offers a few future perspectives. Overall, the work performed in this dissertation highlights how TEM can be a powerful technique to establish synthesis -- structure -- property correlations in 2D heterostructure systems at different length scales, ranging from micron to atomic level.
Author : Congli Sun
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (13 download)
Download or read book Structure Study of Magnetic Thin Films for Voltage Controlled Spintronics by Scanning Transmission Electron Microscopy Experiment and Density Functional Theory Calculations written by Congli Sun and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied magnetic thin films for voltage controlled magnetic tunnel junctions (MTJs) by advanced scanning transmission electron microscopy (STEM) and density functional theory (DFT) simulations. MTJs are the prototypical spintronic device and manipulation of magnetism by electrical means is among the most promising approaches to novel voltage-controlled spin electronics. The voltage controlled magnetic effect can be achieved across many different materials systems, all of which depend on high-quality thin films with minimum crystallographic defects. Cr2O3 is antiferromagnetic in bulk but ferromagnetic on the (0001) surface. Bulk Cr2O3 has two degenerate antiferromagnetic states with opposite (0001) surface spin polarization. As Cr2O3 is also magnetoelectric, the degenerate antiferromagnetic states can be lifted by manipulating the free-energy gain [delta]F=aEH. Therefore, the surface ferromagnetism can be controlled by applied electric field. We have observed vertical grain boundaries in Cr2O3/Al2O3 systems that are related with a 60[degrees] in-plane rotation by diffraction contrast TEM image. STEM as a function of scattering angle points out a simultaneous [1/3][101 0] basal plane shift. Local boundary electron energy loss spectroscopy (EELS) shows a pre-peak on the O K-edge, indicating a reduced bandgap along the boundary that provides potential breakdown paths in Cr2O3 thin films. B doping of Cr2O3 is known to increase the N[e with accent]el temperature. B was found to form either BCr4 tetrahedra or BO3 triangles in the Cr2O3 lattice, with [sigma]^* and [pi]^* bonds exhibiting different energy loss features. Modeling the experimental spectra as a linear combination of simulated B K edges reproduces the experimental [pi]^* / [sigma]^* ratios for 12 to 43 % of the B in the sample occupying BCr4 sites. Simulated BCr4 fraction / total B as a function of oxygen partial pressures supports the EELS results and indicates further increase of N[e with accent]el temperature can be achieved by optimizing oxygen partial pressures.
Author : John F. Dobson
Publisher : Springer Science & Business Media
ISBN 13 : 148990316X
Total Pages : 384 pages
Book Rating : 4.4/5 (899 download)
Download or read book Electronic Density Functional Theory written by John F. Dobson and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an outcome of the International Workshop on Electronic Density Functional Theory, held at Griffith University in Brisbane, Australia, in July 1996. Density functional theory, standing as it does at the boundary between the disciplines of physics, chemistry, and materials science, is a great mixer. Invited experts from North America, Europe, and Australia mingled with students from several disciplines, rapidly taking up the informal style for which Australia is famous. A list of participants is given at the end of the book. Density functional theory (DFT) is a subtle approach to the very difficult problem of predicting the behavior of many interacting particles. A major application is the study of many-electron systems. This was the workshop theme, embracing inter alia computational chemistry and condensed matter physics. DFT circumvents the more conceptually straightforward (but more computationally intensive) approach in which one solves the many-body Schrodinger equation. It relies instead on rather delicate considerations involving the electron number density. For many years the pioneering work of Kohn and Sham (the Local Density Ap proximation of 1965 and immediate extensions) represented the state of the art in DFT. This approach was widely used for its appealing simplicity and computability, but gave rather modest accuracy. In the last few years there has been a renaissance of interest, quite largely due to the remarkable success of the new generation of gradient functionals whose initiators include invitees to the workshop (Perdew, Parr, Yang).
Author : Jan M. Macak
Publisher : Frontiers Media SA
ISBN 13 : 283255038X
Total Pages : 154 pages
Book Rating : 4.8/5 (325 download)
Download or read book Editors’ Showcase: Nanotechnology written by Jan M. Macak and published by Frontiers Media SA. This book was released on 2024-06-18 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are pleased to present the latest Editors’ Showcase: Nanotechnology Research Topic. This exclusive article collection is led by Specialty Chief Editors, Professors Jan Macák, Giancarlo Franzese, Nicolae Coriolan Panoiu, John Fourkas, and Wee-Jun Ong, and submissions are open to Editorial Board members only. The work presented here celebrates the quality and diversity of research performed by our Associate and Review Editors across the entire breadth of the Nanotechnology field, and may include the latest discoveries, current challenges, and future-forward reviews and perspectives.
Author :
Publisher : Academic Press
ISBN 13 : 0123855179
Total Pages : 275 pages
Book Rating : 4.1/5 (238 download)
Download or read book Advances in Catalysis written by and published by Academic Press. This book was released on 2012-12-31 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Catalysis fills the gap between the journal papers and the textbooks across the diverse areas of catalysis research. For more than 60 years Advances in Catalysis has been dedicated to recording progress in the field of catalysis and providing the scientific community with comprehensive and authoritative reviews. This series in invaluable to chemical engineers, physical chemists, biochemists, researchers and industrial chemists working in the fields of catalysis and materials chemistry. In-depth, critical, state-of-the-art reviews Comprehensive, covers of all aspects of catalysis research
Author : Dmitri A. Bulushev
Publisher : MDPI
ISBN 13 : 3039363808
Total Pages : 122 pages
Book Rating : 4.0/5 (393 download)
Download or read book Advanced Catalysis in Hydrogen Production from Formic Acid and Methanol written by Dmitri A. Bulushev and published by MDPI. This book was released on 2020-06-18 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue is related to studies of the hydrogen production from formic acid decomposition. It is based on five research papers and two reviews. The reviews discuss the liquid phase formic acid decomposition over bimetallic (PdAg), molecular (Ru, Ir, Fe, Co), and heterogenized molecular catalysts. The gas-phase reaction is studied over highly dispersed Pd, Pt, Au, Cu, and Ni supported catalysts. It is shown that the nature of the catalyst’s support plays an important role for the reaction. Thus, N-doping of the carbon support provides a significant promotional effect. One of the reasons for the high activity of the N-doped catalysts is the formation of single-atom active sites stabilized by pyridinic N species present in the support. It is demonstrated that carbon materials can be N-doped in different ways. It can be performed either directly from N-containing compounds during the carbon synthesis or by a post-synthetic deposition of N-containing compounds on the carbon support with known properties. The Issue could be useful for specialists in catalysis and nanomaterials as well as for graduate students studying chemistry and chemical engineering. The reported results can be applied for development of catalysts for the hydrogen production from different liquid organic hydrogen carriers.
