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Technique for determining surface structures
Low-energy electron diffraction (LEED) is a technique for the determination of the surface structure of single-crystalline materials by bombardment with
Low-energy electron diffraction
Low-energy_electron_diffraction
Bending of electron beams due to electrostatic interactions with matter
way electrons can act as waves, and diffract and interact with matter. It also involves the extensive history behind modern electron diffraction, how
Electron_diffraction
Low-energy electron microscopy, or LEEM, is an analytical surface science technique used to image atomically clean surfaces, atom-surface interactions
Low-energy electron microscopy
Low-energy_electron_microscopy
Electron diffraction by reflection from surfaces
methods that also rely on diffraction of high-energy electrons. Transmission electron microscopy, another common electron diffraction method samples mainly
Reflection high-energy electron diffraction
Reflection_high-energy_electron_diffraction
Electron scattering technique for structural analyses
beam electron diffraction (CBED) is an electron diffraction technique where a convergent or divergent beam (conical electron beam) of electrons is used
Convergent beam electron diffraction
Convergent_beam_electron_diffraction
Type of microscope with electrons as a source of illumination
control the electron beam, for instance focusing it to produce magnified images or electron diffraction patterns. As the wavelength of an electron can be more
Electron_microscope
Scientific study of crystal structures
other methods such as low-energy electron diffraction, low-energy electron microscopy and reflection high-energy electron diffraction which can be used to
Crystallography
Emission of surface atoms through energetic particle bombardment
ultra-high-vacuum system to prepare ultra-clean surfaces for low-energy electron-diffraction (LEED) studies. Sputter cleaning became an integral part of
Sputtering
Method to determine atomic positions in solids using an electron microscope
methods are low-energy electron diffraction which has solved the structure of many surfaces, and reflection high-energy electron diffraction which is used
Electron_crystallography
Crystallographic electron diffraction technique
larger, the electrons are diffracted on the crystal lattice, acting as a diffraction grating. Due to the diffraction, part of the electrons is scattered
Selected_area_diffraction
Elastic interaction of x-rays with electrons
sources. Similar diffraction patterns can be produced by related scattering techniques such as electron diffraction or neutron diffraction. If single crystals
X-ray_diffraction
Scanning electron microscopy technique
Electron backscatter diffraction (EBSD) is a scanning electron microscopy (SEM) technique used to study the crystallographic structure of materials. EBSD
Electron backscatter diffraction
Electron_backscatter_diffraction
Single scattering diffraction
transmission: with high-energy electrons, for low energy electron diffraction, or reflection high-energy electron diffraction Als-Nielsen, Jens; McMorrow
Kinematic_diffraction
Describes the range of energies of an electron within the solid
energies, see Stern, R.; Perry, J.; Boudreaux, D. (1969). "Low-Energy Electron-Diffraction Dispersion Surfaces and Band Structure in Three-Dimensional
Electronic_band_structure
Degree to which a particle's spin aligns with a given direction
of free electrons is measured either by a low-energy electron diffraction (LEED) image from a clean tungsten crystal (SPLEED) or by an electron microscope
Spin_polarization
Interference phenomenon of waves
high-energy electron diffraction – Electron diffraction by reflection from surfaces X-ray diffraction – Elastic interaction of x-rays with electrons Angle-sensitive
Diffraction
Elementary particle with negative charge
required energies; particle detectors observe the resulting energy emissions, which particle physics studies. Low-energy electron diffraction (LEED) is
Electron
British physicist
research career started with his PhD, which was concerned with low-energy electron diffraction (LEED), a technique for examining the surface of materials
John_Pendry
Scattering from arrays of atoms
jointly win. The concept of Bragg diffraction applies equally to neutron diffraction and approximately to electron diffraction. In both cases the wavelengths
Bragg's_law
Method of observing gaseous atomic structure
principle is the same as that of other electron diffraction methods such as LEED and RHEED, but the obtainable diffraction pattern is considerably weaker than
Gas_electron_diffraction
Experiment verifying the wave-particle duality of matter
Western Electric (later Bell Labs). Electrons, scattered by the surface of a crystal of nickel metal, displayed a diffraction pattern. This confirmed the hypothesis
Davisson–Germer_experiment
Type of electron microscopy
which goes together naturally with low-energy electron diffraction (LEED), and low-energy electron microscopy (LEEM). In biology, it is called photoelectron
Photoemission electron microscopy
Photoemission_electron_microscopy
German-American physicist (born 1928)
conventional electron microscopy, Ultra high vacuum UHV reflection electron diffraction, Low-energy electron diffraction LEED and Auger electron spectroscopy
Ernst_G._Bauer
Diffraction using small incidence angles
different areas: Reflection high-energy electron diffraction (RHEED), where electrons of relatively high energy diffract at small angles from a surface
Grazing_incidence_diffraction
Material with a continuous, unbroken crystal lattice
techniques such as angle-resolved photoemission spectroscopy or low-energy electron diffraction are only possible or meaningful on surfaces of single crystals
Single_crystal
Diffraction of He from surfaces
probe only the first few monolayers of a material, such as low-energy electron diffraction (LEED), helium atom scattering is unique in that it does not
Helium_atom_scattering
Imaging and diffraction using electrons that pass through samples
Electron microscope Cryogenic electron microscopy Electron diffraction Electron energy loss spectroscopy (EELS) Energy filtered transmission electron
Transmission electron microscopy
Transmission_electron_microscopy
Chemical analysis technique
creating an electron hole where the electron was. An electron from an outer, higher-energy shell then fills the hole, and the difference in energy between
Energy-dispersive X-ray spectroscopy
Energy-dispersive_X-ray_spectroscopy
Study of physical and chemical phenomena that occur at the interface of two phases
photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), electron energy loss spectroscopy (EELS), thermal
Surface_science
Quantum mechanical waves describing matter
are also used to describe the diffraction of high-energy electrons by solids. Waves with angular momentum such as electron vortex beams. Evanescent waves
Matter_wave
Lithographic technique that uses a scanning beam of electrons
spreading of the electron beam in the resist. Low energy electron optical systems are also hard to design for high resolution. Coulomb inter-electron repulsion
Electron-beam_lithography
Form of electron microscopy
scanning electron nano diffraction (SEND), nanobeam electron diffraction (NBED), or pixelated STEM. The use of diffraction patterns as a function of
4D scanning transmission electron microscopy
4D_scanning_transmission_electron_microscopy
American physicist
developed equipment that allowed for the visual display of low-energy electron diffraction patterns on a fluorescent screen. He retired in early 1960s
Lester_Germer
Deviation of electrons from their original trajectories
elastically scattered electrons from the trapped Cs being clearly visible. Zeeman effect Particle physics Low-energy electron diffraction Quantum electrodynamics
Electron_scattering
Type of electron microscope
emitted X-rays can be detected by energy dispersive X-ray spectrometry. Secondary electrons have very low energies on the order of 50 eV, which limits
Scanning_electron_microscope
Technique to investigate atomic structures using neutron scattering
to obtain a diffraction pattern that provides information of the structure of the material. The technique is similar to X-ray diffraction but, due to
Neutron_diffraction
Scanning transmission electron microscope (STEM) Low-energy electron microscopy (LEEM) Electron diffraction Low-energy electron diffraction (LEED) LVEM is especially
Low-voltage electron microscope
Low-voltage_electron_microscope
time. Some additional tools may include Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and x-ray photoelectron spectroscopy
Low-energy_ion_scattering
Physics experiment
Fresnel diffraction equation, which implies that as the plane of observation gets closer to the plane in which the slits are located, the diffraction patterns
Double-slit_experiment
Holography of electron waves
(i.e. a low energy spread) of the electron beam is required to perform holographic measurements. Electron holography with high-energy electrons (80-200 keV)
Electron_holography
Solid polymer material
"Molecular surface structure of ice(0001): dynamical low-energy electron diffraction, total-energy calculations and molecular dynamics simulations". Surface
Synthetic_ice
Elementary particle or quantum of light
(for example, electron–positron annihilation). In a quantum mechanical model, electromagnetic waves transfer energy in photons with energy proportional
Photon
Backscatter Kikuchi diffraction, see EBSD BRET – Bioluminescence resonance energy transfer BSED – Back scattered electron diffraction, see EBSD CAICISS
List of materials analysis methods
List_of_materials_analysis_methods
Imaging technique for solid chemical analysis
Electron probe microanalysis (EPMA), also known as electron probe X-ray microanalysis, electron microprobe analysis (EMPA) or electron probe analysis (EPA)
Electron_probe_microanalysis
Synchrotron light sources
Diffraction-limited storage rings (DLSR), or ultra-low emittance storage rings, are synchrotron light sources where the emittance of the electron-beam
Diffraction-limited storage ring
Diffraction-limited_storage_ring
Experimental method in X-ray diffraction
powder diffraction is with X-rays, the focus of this article, although some aspects of neutron powder diffraction are mentioned. (Powder electron diffraction
Powder_diffraction
Concept in quantum mechanics
experimental verification of wave property of electrons by diffraction experiments. Similar crystal diffraction experiments were carried out by Otto Stern
Wave–particle_duality
Scientific instruments
detecting and recording the images, diffraction patterns, and electron energy loss spectra produced using transmission electron microscopy (TEM). Traditionally
Detectors for transmission electron microscopy
Detectors_for_transmission_electron_microscopy
Electron microscopy technique
amorphous ice formed on the film was less than 1 μm thick and an electron diffraction pattern confirmed the presence of amorphous/vitreous ice. In 1984
Cryo-electron_microscopy
Emission of secondary X-rays from a material excited by high-energy X-rays
scientific methods that use X-ray/neutron or electron diffraction the before mentioned planes of a diffraction can be doubled to display higher order reflections
X-ray_fluorescence
Scanning microscopy using thin samples and transmitted electrons
(see above). CBED differs from conventional electron diffraction in that CBED patterns consist of diffraction disks, rather than spots. The width of CBED
Scanning transmission electron microscopy
Scanning_transmission_electron_microscopy
Lensless computational imaging method
space images from diffraction patterns. The first idea was the realization by Sayre in 1952 that Bragg diffraction under-samples diffracted intensity relative
Coherent_diffraction_imaging
Synthetic pigment
by Polarized Neutron Diffraction. 1980. Helvetica Chimica Acta. 63/148-153. doi:10.1002/hlca.19800630115. Neutron Diffraction Study of Prussian Blue
Prussian_blue
also of low intensities. Hence Bragg's law was the only type of diffraction observable, and Duane's approach could model it. Modern electron microscopes
Duane's_hypothesis
Small angle deflection of waves
scattering dominates, in particular for electron diffraction and electron microscopy, X-ray diffraction and neutron diffraction. In these the relevant waves are
Forward_scatter
Canadian chemist
surface atomic motions from surface field effects in ultrafast low-energy electron diffraction. COMMUNICATIONS MATERIALS, 3 (10), 2022. https://doi.org/10
R._J._Dwayne_Miller
Function describing an electron in an atom
and experimental findings (such as the two slit diffraction of electrons), it was found that the electrons orbiting a nucleus could not be fully described
Atomic_orbital
Non-crystalline solid
needed] Unlike crystalline materials, which exhibit strong Bragg diffraction, the diffraction patterns of amorphous materials are characterized by broad and
Amorphous_solid
Effect in surface physics
generally fall into two categories: diffraction-based methods adapted for surface science, such as low-energy electron diffraction (LEED) or Rutherford backscattering
Surface_reconstruction
Algorithmic imaging methods that reconstruct quantitative phase and amplitude
X-ray, and electron modalities. When a coherent beam of photons or electrons interacts with a specimen, detectors record only the diffraction intensities
Computational_microscopy
Fourier transform of a real-space lattice, important in solid-state physics
a major role in many areas such as X-ray and electron diffraction as well as the energies of electrons in a solid. It emerges from the Fourier transform
Reciprocal_lattice
Optical system with resolution performance at the instrument's theoretical limit
limit to its resolution due to the physics of diffraction. An optical instrument is said to be diffraction-limited if it has reached this limit of resolution
Diffraction-limited_system
Lithography using 13.5 nm UV light
7271, 72711E (2009). "Double Diffraction Model of EUV Masks". 26 September 2021 – via www.youtube.com. "Double Diffraction in EUV Masks: Seeing Through
EUV_lithography
Self-propulsion of a person over ice, wearing bladed skates
"Molecular surface structure of ice(0001): dynamical low-energy electron diffraction, total-energy calculations and molecular dynamics simulations". Surface
Ice_skating
Layer of adatoms adsorbed onto a surface
unit cell) can be determined by low-energy electron diffraction (LEED), because there will be additional diffraction beams associated with the overlayer
Overlayer
Lithographic technique that uses X-rays instead of light
electrons. The range of low-energy secondary electrons is sometimes larger than the range of primary photo-electrons or of Auger electrons. What matters for
X-ray_lithography
smaller than in the low energy case, and allows whole regions to be mapped in a reciprocal lattice, similar to electron diffraction. Access to diffuse
High-energy_X-rays
Beam of electrons observed in vacuum tubes
tube Electron beam processing Electron diffraction Electron microscope Electron beam melting Electron beam welding Electron beam technology Electron gun
Cathode_ray
Tomography technique
transmission electron microscopy (ADF-STEM), which is typically used on material specimens, more effectively suppresses phase and diffraction contrast, providing
Electron_tomography
Topics referred to by the same term
and film producer Melveen Leed (born 1943), Hawaiian singer Low-energy electron diffraction, a characterization technique in crystallography Leeds (disambiguation)
Leed_(disambiguation)
by electron impact, i.e. precursor dissociation, have a relatively low cross section. The majority of decomposition occurs via low energy electron impact:
Electron beam-induced deposition
Electron_beam-induced_deposition
American chemist (1935–2025)
professor in 1964. The introduction of new technology such as low-energy electron diffraction revolutionised the study of surfaces in the 1950s and 1960s
Gábor_A._Somorjai
Probability density of electrons being somewhere
by electron spin resonance, neutron diffraction allows direct mapping of the spin density in 3D-space. Difference density map Electron cloud Electron configuration
Electron_density
Crystalline materials consisting of a single layer of atoms
trap and dissociate them at low temperature. A structure determination of stanene using low energy electron diffraction has shown ultra-flat stanene
Single-layer_materials
Device that emits light via optical amplification
which is diffraction-limited. Laser beams can be focused to very tiny spots, achieving a very high irradiance, or they can have a very low divergence
Laser
Type of electromagnetic radiation
Radio waves can reach points beyond the line-of-sight by diffraction and reflection. Diffraction causes radio waves to bend around obstructions such as
Radio_wave
American physicist
focus, particularly methods to invert low-energy electron diffraction data and invert the patterns formed when electrons are emitted from a surface by the
Dilano_Saldin
Study of the 3D shapes of molecules
detected by these techniques. X-ray crystallography, neutron diffraction and electron diffraction can give molecular structure for crystalline solids based
Molecular_geometry
Form of electromagnetic radiation
If the electron has enough energy, it can knock an orbital electron out of the inner electron shell of the target atom. After that, electrons from higher
X-ray
Release of an atoms or molecules from a surface
Surface Analysis with Temperature Programmed Desorption and Low-Energy Electron Diffraction, Versuch Nr. 89 F-Praktikum in den Bachelor- und Masterstudiengängen
Desorption
German physicist
worked in Prof. Dick Stern’s research group on Low-energy electron diffraction and X-Ray Diffraction. He became good friends with the new Head of Department
Heinrich_Karsten_Wagenfeld
Laser using electron beam in vacuum as gain medium
re-interacts with the electrons to make them emit coherently, exponentially increasing its intensity. As electron kinetic energy and undulator parameters
Free-electron_laser
Source for electron beams which works via the photoelectric effect
by a klystron or other RF power source. For low-energy beams, such as ones used in electron diffraction and microscopy, electrostatic acceleration (DC)
Photoinjector
Bell Labs using a flat phosphor screen for the first modern low-energy electron diffraction camera combined with ultra-high vacuum, the start of quantitative
Timeline_of_crystallography
Vacuum tube used to display images
to 600 mA at 6.3 V. The cathode emits low energy electrons, which are accelerated and focused into an electron beam. Color CRTs have three cathodes: one
Cathode_ray_tube
Optical component which splits light into several beams
In optics, a diffraction grating is a grating with a periodic structure of appropriate scale so as to diffract light, or another type of electromagnetic
Diffraction_grating
Type of cathode-ray tube
electron diffraction, a simple deflection tube with a fluorescent screen, and one which could be used to measure the charge-to-mass ratio of an electron. The
Teltron_tube
Particle accelerator designed to produce intense x-ray beams
specialized particle accelerators, typically accelerating electrons. Once the high-energy electron beam has been generated, it is directed into auxiliary
Synchrotron_light_source
American chemist (born 1953)
Advisory Committee of Australia's ARC Centre of Excellence in Future Low-Energy Electronics Technologies. Williams' research in experimental surface science
Ellen_D._Williams_(scientist)
Research of materials
such as diffraction with X-rays, electrons or neutrons, and various forms of spectroscopy and chemical analysis such as Raman spectroscopy, energy-dispersive
Materials_science
Particle collisions conserving kinetic energy
electron diffraction techniques like reflection high energy electron diffraction (RHEED), transmission electron diffraction (TED), and gas electron diffraction
Elastic_scattering
Optical device for selecting part of a spectrum
the phenomenon of optical dispersion in a prism, or that of diffraction using a diffraction grating, to spatially separate the colors of light. It usually
Monochromator
Model for predicting molecular geometry
is that the valence electron pairs surrounding an atom tend to repel each other. The greater the repulsion, the higher in energy (less stable) the molecule
VSEPR_theory
Chemical analysis technique
void is filled when an electron from a higher orbital releases energy and drops down to replace the dislodged electron. The energy difference between the
Wavelength-dispersive X-ray spectroscopy
Wavelength-dispersive_X-ray_spectroscopy
Synchrotron light source in Kraków, Poland
eV) and low-energy electron diffraction (LEED). ARPES and Spin-ARPES enable the measurement of three fundamental electron parameters: energy, momentum
Solaris_(synchrotron)
Materials science and powder diffraction beamline is for high-resolution powder diffraction and high pressure powder diffraction using diamond anvil cells
ALBA_(synchrotron)
States of matter for water as a solid
Kamb elucidated crystal structure of ice IV through a low-temperature single-crystal X-ray diffraction, describing it as a rhombohedral unit cell with a space
Phases_of_ice
Layer of material with nanometer-scale thickness
techniques, including scanning electron microscopy (SEM], X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray analysis
Nanofilm
Methods to make single-atom-thick carbon sheets
crystalline material. Low-energy electrons (20–200 eV) impact the surface and elastically backscattered electrons illuminate a diffraction pattern on a fluorescent
Graphene production techniques
Graphene_production_techniques
Concept relating to waves and signals
graphed along its range or spectrum. Examples are the range of electron energy in electron spectroscopy or the range of mass-to-charge ratio in mass spectrometry
Spectrum_(physical_sciences)
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