Image Contrast In Mirror And Low Energy Electron Microscopy
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Image Contrast In Mirror And Low Energy Electron Microscopy
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Author : Shane Michael Kennedy
language : en
Publisher:
Release Date : 2010
Image Contrast In Mirror And Low Energy Electron Microscopy written by Shane Michael Kennedy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Electron microscopy categories.
We develop several approaches to understand and interpret image contrast in mirror electron microscopy (MEM) and low energy electron microscopy (LEEM), with potential applications to photoemission electron microscopy (PEEM). We treat both the forward problem, of how surface features and properties create image contrast, and the inverse problem, of how we may infer quantitative information about surface features and properties from experimental MEM, LEEM and PEEM images. The thesis begins with the development of the Laplacian imaging theory of MEM, whereby image contrast is understood as the second derivative of the surface topography, blurred slightly to account for the interaction of the electron beam with the electric field above the specimen, rather than the specimen surface itself. This intuitive method includes the effects of lens aberrations and can be rapidly inverted to recover the surface topography from experimental MEM images. For specimen surface variations that are outside the regime of the Laplacian imaging theory and other models, we develop a caustic imaging theory for MEM. This involves solving the electric field above the specimen and tracing a family or envelope of rays through the immersion lens. Where initially adjacent rays cross, caustics are created, and these strong image features may be used to recover three dimensional surface topography. Both the Laplacian imaging theory and the caustic imaging theory are successfully applied to experimental MEM data to obtain the surface topography. As a complement to this ray-based treatment, we then develop a wave optical treatment of LEEM image contrast, adopting the complex transfer function methodology from transmission electron microscopy. This method includes spherical and chromatic aberration, and may be extended to include higher order aberrations for use in aberration corrected LEEM instruments. With knowledge of the complex transfer function, we then apply phase retrieval methods to simulated LEEM images, recovering the electron wave function and surface topography for a series of step terraces. Finally, we consider a wave optical treatment of MEM, investigating the behaviour of the electron wave in the vicinity of the turn around region. This is extended to explore the application of MEM beyond specimen surfaces, and the feasibility of imaging very weak potentials, such as the ponderomotive potential experienced by an electron in a light field.
Surface Microscopy With Low Energy Electrons
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Author : Ernst Bauer
language : en
Publisher: Springer
Release Date : 2014-07-10
Surface Microscopy With Low Energy Electrons written by Ernst Bauer and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-10 with Technology & Engineering categories.
This book, written by a pioneer in surface physics and thin film research and the inventor of Low Energy Electron Microscopy (LEEM), Spin-Polarized Low Energy Electron Microscopy (SPLEEM) and Spectroscopic Photo Emission and Low Energy Electron Microscopy (SPELEEM), covers these and other techniques for the imaging of surfaces with low energy (slow) electrons. These techniques also include Photoemission Electron Microscopy (PEEM), X-ray Photoemission Electron Microscopy (XPEEM), and their combination with microdiffraction and microspectroscopy, all of which use cathode lenses and slow electrons. Of particular interest are the fundamentals and applications of LEEM, PEEM, and XPEEM because of their widespread use. Numerous illustrations illuminate the fundamental aspects of the electron optics, the experimental setup, and particularly the application results with these instruments. Surface Microscopy with Low Energy Electrons will give the reader a unified picture of the imaging, diffraction, and spectroscopy methods that are possible using low energy electron microscopes.
Diffraction And Imaging Techniques In Material Science P2
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Author : S Amelinckx
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Diffraction And Imaging Techniques In Material Science P2 written by S Amelinckx and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Computers categories.
Diffraction and Imaging Techniques in Material Science reviews recent developments in diffraction and imaging techniques used in the study of materials. It discusses advances in high-voltage electron microscopy, low-energy electron diffraction (LEED), X-ray and neutron diffraction, X-ray topography, mirror electron microscopy, and field emission microscopy. Organized into five parts encompassing nine chapters, this volume begins with an overview of the dynamical theory of the diffraction of high-energy electrons in crystals and methodically introduces the reader to dynamical diffraction in perfect and imperfect crystals, inelastic scattering of electrons in crystals, and X-ray production. It then explores back scattering effects, the technical features of high-voltage electron microscopes, and surface characterization by LEED. Other chapters focus on the kinematical theory of X-ray diffraction, techniques and interpretation in X-ray topography, and interpretation of the contrast of the images of defects on X-ray topographs. The book also describes theory and applications of mirror electron microscopy, surface studies by field emission of electrons, field ionization and field evaporation, and gas-surface interactions before concluding with a discussion on lattice imperfections. Scientists and students taking courses on diffraction and solid-state electron microscopy will benefit from this book.
A Novel Low Energy Electron Microscope For Dna Sequencing And Surface Analysis
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Author :
language : en
Publisher:
Release Date : 2014
A Novel Low Energy Electron Microscope For Dna Sequencing And Surface Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Monochromatic, aberration-corrected, dual-beam low energy electron microscopy (MAD-LEEM) is a novel technique that is directed towards imaging nanostructures and surfaces with sub-nanometer resolution. The technique combines a monochromator, a mirror aberration corrector, an energy filter, and dual beam illumination in a single instrument. The monochromator reduces the energy spread of the illuminating electron beam, which significantly improves spectroscopic and spatial resolution. Simulation results predict that the novel aberration corrector design will eliminate the second rank chromatic and third and fifth order spherical aberrations, thereby improving the resolution into the sub-nanometer regime at landing energies as low as one hundred electron-Volts. The energy filter produces a beam that can extract detailed information about the chemical composition and local electronic states of non-periodic objects such as nanoparticles, interfaces, defects, and macromolecules. The dual flood illumination eliminates charging effects that are generated when a conventional LEEM is used to image insulating specimens. A potential application for MAD-LEEM is in DNA sequencing, which requires high resolution to distinguish the individual bases and high speed to reduce the cost. The MAD-LEEM approach images the DNA with low electron impact energies, which provides nucleobase contrast mechanisms without organometallic labels. Furthermore, the micron-size field of view when combined with imaging on the fly provides long read lengths, thereby reducing the demand on assembling the sequence. Finally, experimental results from bulk specimens with immobilized single-base oligonucleotides demonstrate that base specific contrast is available with reflected, photo-emitted, and Auger electrons. Image contrast simulations of model rectangular features mimicking the individual nucleotides in a DNA strand have been developed to translate measurements of contrast on bulk DNA to the detectability of individual DNA bases in a sequence.
Advances In Imaging And Electron Physics
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Author :
language : en
Publisher: Academic Press
Release Date : 1995-11-22
Advances In Imaging And Electron Physics written by and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995-11-22 with Technology & Engineering categories.
Academic Press is pleased to announce the creation of Advances in Imaging and Electron Physics. This serial publication results from the merger of two long-running serials--Advances in Electronics and Electron Physics and Advances in Optical & Electron Microscopy. Advances in Imaging & Electron Physics will feature extended articles on the physics of electron devices (especially semiconductor devices), particle optics at high and low energies,microlithography, image science and digital image processing, electromagnetic wave propagation, electron microscopy, and the computing methods used in all these domains.
Electron Microscopy
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Author : S. Amelinckx
language : en
Publisher: John Wiley & Sons
Release Date : 2008-09-26
Electron Microscopy written by S. Amelinckx and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-09-26 with Technology & Engineering categories.
Derived from the successful three-volume Handbook of Microscopy, this book provides a broad survey of the physical fundamentals and principles of all modern techniques of electron microscopy. This reference work on the method most often used for the characterization of surfaces offers a competent comparison of the feasibilities of the latest developments in this field of research. Topics include: * Stationary Beam Methods: Transmission Electron Microscopy/ Electron Energy Loss Spectroscopy/ Convergent Electron Beam Diffraction/ Low Energy Electron Microscopy/ Electron Holographic Methods * Scanning Beam Methods: Scanning Transmission Electron Microscopy/ Scanning Auger and XPS Microscopy/ Scanning Microanalysis/ Imaging Secondary Ion Mass Spectrometry * Magnetic Microscopy: Scanning Electron Microscopy with Polarization Analysis/ Spin Polarized Low Energy Electron Microscopy Materials scientists as well as any surface scientist will find this book an invaluable source of information for the principles of electron microscopy.
Image Formation In Low Voltage Scanning Electron Microscopy
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Author : Ludwig Reimer
language : en
Publisher: SPIE Press
Release Date : 1993
Image Formation In Low Voltage Scanning Electron Microscopy written by Ludwig Reimer and has been published by SPIE Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Science categories.
While most textbooks about scanning electron microscopy (SEM) cover the high-voltage range from 5-50 keV, this volume considers the special problems in low-voltage SEM and summarizes the differences between LVSEM and conventional SEM. Chapters cover the influence of lens aberrations and design on electron-probe formation; the effect of elastic and inelastic scattering processes on electron diffusion and electron range; charging and radiation damage effects; the dependence of SE yield and the backscattering coefficient on electron energy, surface tilt, and material as well as the angular and energy distributions; and types of image contrast and the differences between LVSEM and conventional SEM modes due to the influence of electron-specimen interactions.
Springer Handbook Of Surface Science
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Author : Mario Rocca
language : en
Publisher: Springer Nature
Release Date : 2021-01-14
Springer Handbook Of Surface Science written by Mario Rocca and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-14 with Science categories.
This handbook delivers an up-to-date, comprehensive and authoritative coverage of the broad field of surface science, encompassing a range of important materials such metals, semiconductors, insulators, ultrathin films and supported nanoobjects. Over 100 experts from all branches of experiment and theory review in 39 chapters all major aspects of solid-state surfaces, from basic principles to applications, including the latest, ground-breaking research results. Beginning with the fundamental background of kinetics and thermodynamics at surfaces, the handbook leads the reader through the basics of crystallographic structures and electronic properties, to the advanced topics at the forefront of current research. These include but are not limited to novel applications in nanoelectronics, nanomechanical devices, plasmonics, carbon films, catalysis, and biology. The handbook is an ideal reference guide and instructional aid for a wide range of physicists, chemists, materials scientists and engineers active throughout academic and industrial research.
In Situ Real Time Characterization Of Thin Films
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Author : Orlando Auciello
language : en
Publisher: John Wiley & Sons
Release Date : 2001
In Situ Real Time Characterization Of Thin Films written by Orlando Auciello and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Science categories.
An in-depth look at the state of the art of in situ real-time monitoring and analysis of thin films With thin film deposition becoming increasingly critical in the production of advanced electronic and optical devices, scientists and engineers working in this area are looking for in situ, real-time, structure-specific analytical tools for characterizing phenomena occurring at surfaces and interfaces during thin film growth. This volume brings together contributed chapters from experts in the field, covering proven methods for in situ real-time analysis of technologically important materials such as multicomponent oxides in different environments. Background information and extensive references to the current literature are also provided. Readers will gain a thorough understanding of the growth processes and become acquainted with both emerging and more established methods that can be adapted for in situ characterization. Methods and their most useful applications include: * Low-energy time-of-flight ion scattering and direct recoil spectroscopy (TOF-ISRAS) for studying multicomponent oxide film growth processes * Reflection high-energy electron diffraction (RHEED) for determining the nature of chemical reactions at film surfaces * Spectrometric ellipsometry (SE) for use in the analysis of semiconductors and other multicomponent materials * Reflectance spectroscopy and transmission electron microscopy for monitoring epitaxial growth processes * X-ray fluorescence spectroscopy for studying surface and interface structures * And other cost-effective techniques for industrial application
Surface And Thin Film Analysis
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Author : Gernot Friedbacher
language : en
Publisher: John Wiley & Sons
Release Date : 2011-03-31
Surface And Thin Film Analysis written by Gernot Friedbacher and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-03-31 with Technology & Engineering categories.
Surveying and comparing all techniques relevant for practical applications in surface and thin film analysis, this second edition of a bestseller is a vital guide to this hot topic in nano- and surface technology. This new book has been revised and updated and is divided into four parts - electron, ion, and photon detection, as well as scanning probe microscopy. New chapters have been added to cover such techniques as SNOM, FIM, atom probe (AP),and sum frequency generation (SFG). Appendices with a summary and comparison of techniques and a list of equipment suppliers make this book a rapid reference for materials scientists, analytical chemists, and those working in the biotechnological industry. From a Review of the First Edition (edited by Bubert and Jenett) "... a useful resource..." (Journal of the American Chemical Society)