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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
Method of observing gaseous atomic structure
Gas electron diffraction (GED) is one of the applications of electron diffraction techniques. The target of this method is the determination of the structure
Gas_electron_diffraction
Method to determine atomic positions in solids using an electron microscope
scattering, gas electron diffraction developed by Herman Mark and Raymond Weil, diffraction in liquids by Louis Maxwell, and the first electron microscopes
Electron_crystallography
Electron diffraction using very short pulses
Ultrafast electron diffraction (UED), also known as femtosecond electron diffraction, is a pump-probe experimental method based on the combination of optical
Ultrafast electron diffraction
Ultrafast_electron_diffraction
Interference phenomenon of waves
with matter Fraunhofer diffraction – Far-field diffraction Fresnel diffraction – Near-field diffraction Gas electron diffraction – Method of observing
Diffraction
Russian chemist
a Soviet and Russian physical chemist and a specialist in the gas electron diffraction method. He was awarded the USSR State Prize in 1973. Victor P.
Victor_Pavlovich_Spiridonov
Electron diffraction by reflection from surfaces
Reflection high-energy electron diffraction (RHEED) is a technique used to characterize the surface of crystalline materials. RHEED systems gather information
Reflection high-energy electron diffraction
Reflection_high-energy_electron_diffraction
Study of the 3D shapes of molecules
between nuclei and concentration of electron density. Gas electron diffraction can be used for small molecules in the gas phase. NMR and FRET methods can
Molecular_geometry
Imaging and diffraction using electrons that pass through samples
selecting the diffracted beams indicated in diffraction pattern with circles (b) using an aperture at the back focal plane. Grains from which electrons are scattered
Transmission electron microscopy
Transmission_electron_microscopy
Particle scattering in which kinetic energy is not conserved
in the case of gas electron diffraction (GED), reflection high-energy electron diffraction (RHEED), and transmission electron diffraction, because the energy
Inelastic_scattering
Chemical compound
The P 4 molecule in the gas phase has a P-P bond length of rg = 2.1994(3) Å as was determined by gas electron diffraction. The β form of white phosphorus
White_phosphorus
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
Elementary particle with negative charge
studies. Low-energy electron diffraction (LEED) is a method of bombarding a crystalline material with a collimated beam of electrons and then observing
Electron
Toxic gaseous compound (COCl2)
Kuchitsu, K. (1980). "Molecular Structure of Phosgene as Studied by Gas Electron Diffraction and Microwave Spectroscopy. The rz Structure and Isotope Effect"
Phosgene
Chemical compound
spectroscopy. Similar dimensions of 1.98 Å and 98° are found by gas electron diffraction. Michalke, K.; Wickenheiser, E. B.; Mehring, M.; Hirner, A. V.;
Dimethyl_selenide
Colorless flammable liquid with an ammonia-like odor
pyramidal. The structure of the free molecules was determined by gas electron diffraction and microwave spectroscopy. The N–N single bond length is 1.447(2)
Hydrazine
Organic compound (CH3–C≡N); simplest organic nitrile
Structures of Hydrogen Cyanide and Acetonitrile as Studied by Gas Electron Diffraction". Bulletin of the Chemical Society of Japan. 47 (2): 299–304. doi:10
Acetonitrile
interaction of a 2D gas with surroundings, e.g. condensation of a 2D gas) or integral (measuring integral properties of 2D gases, e.g. by diffraction methods).
Two-dimensional_gas
Norwegian chemist (1936–2023)
laboratory for gas electron diffraction. He, his co-workers and colleagues determined the structures of umpteen important chemical compounds in the gas phase.
Arne_Haaland
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
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
Chemical compound
C3v molecular symmetry, with the structure S=PCl3. According to gas electron diffraction, the phosphorus–sulfur bond length is 189 pm and the phosphorus–chlorine
Thiophosphoryl_chloride
Organic compound (H–CHO); simplest aldehyde
molecular geometry of gaseous formaldehyde has been determined by gas electron diffraction and microwave spectroscopy. The bond lengths are 1.21 Å for the
Formaldehyde
Chemical compound
experimentally in the gas phase (combined gas-electron diffraction and microwave spectroscopy, GED/MW) and in the crystalline state (X-ray diffraction, XRD) (see
Methyl_nitrate
Laser using electron beam in vacuum as gain medium
expected number of diffraction patterns is also expected to increase by a substantial amount. The increase in the number of diffraction patterns will place
Free-electron_laser
Principal energy levels in atomic physics
of X-ray diffraction: the first was unconnected with the type of material used in the experiment and could be polarized. The second diffraction beam he
Electron_shell
British physicist (1892–1975)
with Clinton Davisson "for their experimental discovery of the diffraction of electrons by crystals." His father, J. J. Thomson, won the Nobel Prize in
George_Paget_Thomson
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
Branch of chemistry which studies 3D structure of molecules
metric three-dimensional information: can be obtained for gases by gas electron diffraction and microwave (rotational) spectroscopy (and other rotationally
Structural_chemistry
Quantum mechanical waves describing matter
and interaction characteristics of electrons, neutrons, and atoms are leveraged for advanced microscopy and diffraction technologies. At the end of the 19th
Matter_wave
Chemical compound
molecular structure of diboron tetrachloride, B2Cl4, was determined by gas electron diffraction. The molecules have D2d symmetry, i.e. the two planar BBCl2 units
Diboron_tetrachloride
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
Chemical compound
various phases. Early investigations by gas electron diffractions were unable to describe the observed diffraction pattern in full and only the application
Tetranitromethane
Solid forms of the element phosphorus
The free P4 molecule in the gas phase has a P-P bond length of rg = 2.1994(3) Å as was determined by gas electron diffraction. Despite the tetrahedral arrangement
Allotropes_of_phosphorus
Chemical element with atomic number 15 (P)
(11 nA/T). The P4 molecule in the gas phase has a P-P bond length of 2.1994(3) Å as determined by gas electron diffraction. White phosphorus exists in two
Phosphorus
Scanning electron microscope with a gaseous environment in the specimen chamber
"environmental" cells with water or atmospheric gas, in conjunction with conventional and scanning transmission types of electron microscopes. However, the first images
Environmental scanning electron microscope
Environmental_scanning_electron_microscope
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
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
(EDS/EDX) Electron diffraction (ED) Field flow fractionation (FFF) Flow injection analysis (FIA) Fourier transform infrared spectroscopy (FTIR) Gas chromatography
List of chemical analysis methods
List_of_chemical_analysis_methods
on the diffraction of X-rays and electrons in gases." 1936 - Hans Boersch [de] showed that electron microscope could be used as micro-diffraction cameras
Timeline_of_crystallography
Type of electron microscope
electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons.
Scanning_electron_microscope
Chemical compound
investigated both in the gas state (gas electron diffraction) and in the crystalline phase (X-ray diffraction). In the crystal, it aggregates via C-H---F
Trans-1,3,3,3-Tetrafluoropropene
Trans-1,3,3,3-Tetrafluoropropene
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
Topics referred to by the same term
ged in Wiktionary, the free dictionary. Ged or GED may refer to: Gas electron diffraction General Educational Development test, an American and Canadian
Ged
Deviation of electrons from their original trajectories
interaction involving the electrons of an atom, however nuclear Compton scattering does exist.[citation needed] The first electron diffraction experiment was conducted
Electron_scattering
beam electron diffraction CCM – Charge collection microscopy CDI – Coherent diffraction imaging CE – Capillary electrophoresis CET – Cryo-electron tomography
List of materials analysis methods
List_of_materials_analysis_methods
Vacuum tube used to display images
cathode ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams, which are directed and controlled to display images
Cathode_ray_tube
British physicist (1856–1940)
electricity by gases." In 1897, he showed that cathode rays were composed of previously unknown negatively charged particles (now called electrons), which he
J._J._Thomson
Chemical compound
Ivanov, A; Ivashkevich, L; Spiridonov, V (1977). "Two independent gas electron diffraction investigations of the structure of plumbous chloride". Journal
Lead(II)_chloride
Chemical compound
structure of tris(pentafluorophenyl)borane (BCF) was determined by gas electron diffraction. It has a propeller-like arrangement of its three pentafluorophenyl
Tris(pentafluorophenyl)borane
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
Conversion constant for amount of substance
measurement of the charge on an electron. Dividing the charge on a mole of electrons by the charge on a single electron provided a more accurate estimate
Avogadro_constant
Chemical compound
"Dichlorotrifluorophosphorane (PCl2F3): molecular structure by gas-phase electron diffraction and quadratic force field". Inorganic Chemistry. 24 (18): 2774–2777
Phosphorus trifluorodichloride
Phosphorus_trifluorodichloride
Chemical compound
dialkylzinc compounds studied by density functional theory calculations, gas electron diffraction and photoelectron spectroscopy". Dalton Transactions (22): 4356–4366
Diethylzinc
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
Model for predicting molecular geometry
Valence shell electron pair repulsion (VSEPR) theory (/ˈvɛspər, vəˈsɛpər/ VESP-ər, və-SEP-ər) is a model used in chemistry to predict the geometry of individual
VSEPR_theory
Chemical element with atomic number 1 (H)
common isotope of hydrogen, 1H, consists of one proton, one electron, and no neutrons. Hydrogen gas was first produced artificially in the 17th century by
Hydrogen
Type of chemical bond in metals
conduction electrons (in the form of an electron cloud of delocalized electrons) and positively charged metal ions. Metal atoms lose their valence electrons to
Metallic_bonding
Describes the range of energies of an electron within the solid
November 2016. High-energy bands are important for electron diffraction physics, where the electrons can be injected into a material at high energies,
Electronic_band_structure
Using wave optics to reproduce a three-dimensional light field
to understand interference and diffraction. Interference occurs when one or more wavefronts are superimposed. Diffraction occurs when a wavefront encounters
Holography
Type of chromatography
emission spectra is diffracted by a diffraction grating and detected by a series of photomultiplier tubes or photo diodes. Electron capture detector (ECD)
Gas_chromatography
Chemical compound
Structure of 3,3-Diethylpentane (Tetraethylmethane) in the Gas Phase as Determined by Electron Diffraction and ab Initio Calculations". The Journal of Organic
Tetraethylmethane
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
Chemical compound
hydrides. He proposed the first ethane-like structure of diborane. Electron diffraction measurements by S. H. Bauer initially appeared to support his proposed
Diborane
Chemical element with atomic number 2 (He)
In a plasma, helium's electrons are not bound to its nucleus, resulting in very high electrical conductivity, even when the gas is only partially ionized
Helium
Coating deposition method
particle/particle interfacial region of cold-sprayed nickel coating: Electron backscatter diffraction characterization". Scripta Materialia. 61 (9): 899. doi:10
Cold_spraying
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
Diffraction of He from surfaces
material by measuring the diffracted atoms from a monochromatic helium beam incident on the sample. The first recorded helium diffraction experiment was completed
Helium_atom_scattering
Chemical element with atomic number 17 (Cl)
yellow-green gas at room temperature. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity
Chlorine
Branch of physics focused on matter in the solid state
crystallographic techniques, including X-ray crystallography, neutron diffraction and electron diffraction. The sizes of the individual crystals in a crystalline solid
Solid-state_physics
"Supersilyl radicals from the dissociation of superdisilane observed by gas electron diffraction". Chem. Commun. (25): 2618–2620. doi:10.1039/B702599H. ISSN 1359-7345
Dispersion stabilized molecules
Dispersion_stabilized_molecules
Artificial radioisotope of iron
X-rays and Auger electrons. It is sometimes used as an X-ray source for various scientific analysis methods, such as X-ray diffraction and X-ray fluorescence
Iron-55
Technique used for determining crystal structures and identifying mineral compounds
beam of incident X-rays to diffract in specific directions. By measuring the angles and intensities of the X-ray diffraction, a crystallographer can produce
X-ray_crystallography
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
Study involving matter and electromagnetic radiation
eyes. Rather, spectroscopy involves the splitting of light by a prism, diffraction grating, or similar instrument, to display a particular discrete line
Spectroscopy
Chemical compound
Hargittai I. Molecular structure of tetravinylmethane from gas-phase electron diffraction. Journal of Molecular Structure 1998 Apr: 445(1-3): 47-53. doi:10
Tetravinylmethane
Scientific instrument for observing small objects
microscopy are approaching the resolution of electron microscopes. This occurs because the diffraction limit is occurred from light or excitation, which
Microscope
Chemical compound
Structures of Pentamethylarsenic(V) and Trimethyldichloroarsenic(V) by Gas Electron Diffraction and ab Initio Calculations:? Molecular Mechanics Calculations on
Pentamethylarsenic
Visualization method in chemistry
of molecular orbitals. Furthermore, the electron density of a system can be calculated both by X-ray diffraction experiments and theoretical wavefunction
Non-covalent interactions index
Non-covalent_interactions_index
Chemical compound
colorless liquid. Its structure was determined through the use of electron diffraction intensities and rotational spectroscopy. Two main types of reactions
Acetyl_cyanide
Chemical compound
molecular structure of tellurium dichloride, TeCl2, determined by gas electron diffraction". Journal of Molecular Structure. 128 (1–3). Elsevier BV: 29–31
Tellurium_dichloride
Physical phenomenon
electrons. It occurs when an inner-shell vacancy in an atom is filled by an electron, releasing energy that causes the emission of another electron from
Auger_effect
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
scattering of higher energy electron with lower wavelength. This causes a loss of coherent signal which is required for diffraction and imaging. Mechanical
In_situ_electron_microscopy
Organic compound, industrial chemical
structure and conformation of diethylmethylamine determined by gas electron diffraction and vibrational spectroscopy combined with theoretical calculations"
N,N-Diethylmethylamine
Physical interaction of charged particles
backscattering. Electron on nuclei are employed in electron polarimeters and, for coherent electron sources, in many different kinds of electron diffraction. Couloumb
Coulomb_scattering
American academic (born 1954)
to the study of nanoparticles and worked in the fields of electron microscopy, diffraction, and crystallography. Marks attended Trinity School of John
Laurence_D._Marks
Chemical compound
dialkylzinc compounds studied by density functional theory calculations, gas electron diffraction and photoelectron spectroscopy". Dalton Transactions (22): 4356–4366
Dimethylzinc
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
Range of physical processes in physics
change) of alpha particles by gold nuclei, the Bragg scattering (or diffraction) of electrons and X-rays by a cluster of atoms, and the inelastic scattering
Scattering
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
Chemical compound
utilizing multi-configurational self-consistent field (MCSCF) and gas electron diffraction. Like cyclobutane, the small heterocyclic ring of silacyclobutane
Silacyclobutane
Free crystallographic software
advanced diffraction features like double diffraction covered by dynamical diffraction theory, even though some phenomena caused by multiple electron-matter
CrysTBox
Chemical compound
ammonia with trimethylsilyl groups in place of two hydrogen atoms. An electron diffraction study shows that silicon-nitrogen bond length (173.5 pm) and Si-N-Si
Bis(trimethylsilyl)amine
Used to measure spectral components of light
wavelengths of light are separated by refraction in a prism or by diffraction by a diffraction grating. Ultraviolet–visible spectroscopy is an example. These
Spectrometer
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
Canadian chemist
spectroscopy, and the development of new femtosecond electron sources that facilitates ultrafast electron diffraction experiments. His research has enabled real-time
R._J._Dwayne_Miller
Study of solid materials' properties and composition
products is powder diffraction because many solid-state reactions will produce polycrystalline molds or powders. Powder diffraction aids in the identification
Solid-state_chemistry
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
Using helium atoms to image solid surfaces
spot sizes on a surface. Due to the wavelength of an electron beam being low, the Abbe diffraction limit can be pushed below atomic resolution and electromagnetic
Scanning_helium_microscopy
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GAS ELECTRON-DIFFRACTION
GAS ELECTRON-DIFFRACTION
GAS ELECTRON-DIFFRACTION
GAS ELECTRON-DIFFRACTION
GAS ELECTRON-DIFFRACTION
GAS ELECTRON-DIFFRACTION
GAS ELECTRON-DIFFRACTION
GAS ELECTRON-DIFFRACTION
GAS ELECTRON-DIFFRACTION
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