Search Results for "Ion Induced Secondary Electron Emission"
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Positron Emission Tomography (PET) is a scanning technique that uses an MRI scanner and radioactive substances that are injected into the blood stream to obtain detailed images of the brain that rel...
Singlephoton emission CT SPECT
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Electron's magnetic moment calculated to new precision
An electron, as well as other subatomic particles with an electric charge, is actually a little magnet—it spins like a top, giving it its own magnetic moment. It's the subtle change in this magnetic...
The combination of a direct electron-detection camera that can count individual electrons and an algorithm for correcting for beam-induced motion in cryo-EM will facilitate determination of three-dime...
Demonstration of self-seeding in a hard-X-ray free-electron laser
Lasing in a hard-X-ray free-electron laser is typically seeded from noise due to the self-amplification of spontaneous emission, which limits temporal coherence and spectral characteristics. Researche...
An unexpectedly low oscillator strength as the origin of the Fe xvii emission problem
Highly charged iron (Fe16+, here referred to as Fe xvii) produces some of the brightest X-ray emission lines from hot astrophysical objects, including galaxy clusters and stellar coronae, and it dom...
JEOL's New FE SEM's Feature Sub-Nanometer Imaging Resolution
JEOL's new series of field emission scanning electron microscopes is now complete with the introduction of the sub-nanometer imaging resolution JSM-7800F. The JSM-7800F represents a significant leap.....
Fluorescent and photo-oxidizing TimeSTAMP tags track protein fates in light and electron microscopy
Butko and colleagues report the invention of fluorescent and photo-oxidizing versions of a molecular probe named TimeSTAMP that allows temporal tagging of newly-synthesized proteins of interest. The s...
A 24 π-electron antiaromatic hexaphyrin derivative (rosarin) with a near-planar geometry enforced by bridging phenylene groups has been shown to undergo a proton-coupled electron transfer reduction w...
Electron microscopes with a twist
This press release is available in German . Nowadays, electron microscopes are an essential tool, especially in the field of materials science. At TU Vienna, electron beams are being created t...
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Combination of an aggregation-induced emission (AIE) moiety and a dimesitylboron group yields a new three-coordinate boron compound exhibiting a synergistic effect: the resultant TPEDMesB shows AIE fe...
Characterizing TiO(2)(110) surface states by their work function.
The unreconstructed TiO(2)(110) surface is prepared in well-defined states having different characteristic stoichiometries, namely reduced (r-TiO(2), 6 to 9% surface vacancies), hydroxylated (h-TiO(2)...
Phonon-assisted electron emission from individual carbon nanotubes.
A question of how electrons can escape from one-atom-thick surfaces has seldom been studied and is still not properly answered. Herein, lateral electron emission from a one-atom-thick surface is thoro...
Angular Dependence of the Ion-Induced Secondary Electron Emission for He+ and Ga+ Beams.
In recent years, novel ion sources have been designed and developed that have enabled focused ion beam machines to go beyond their use as nano-fabrication tools. Secondary electrons are usually taken...
Making carbon nanotube electron sources of defined lengths and with closed caps.
A method is reported to make an electron source consisting of an individual multi-walled carbon nanotube (MWNT) mounted on a tungsten support tip, and cut to length using localized electron beam irrad...
