Results 11 to 20 of about 31,675 (266)
HRTEM imaging of atoms at sub-Ångström resolution [PDF]
Microscopy, 2005 John Cowley and his group at Arizona State University pioneered the use of transmission electron microscopy for high-resolution imaging. Images were achieved three decades ago showing the crystal unit cell content at better than 4 A resolution. This achievement enabled researchers to pinpoint the positions of heavy atom columns within the unit cell ...
O'Keefe, Michael A. +2 more
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Quantitative comparison of HRTEM and electron ptychography [PDF]
BIO Web of ConferencesBennemann Felix +2 more
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Limits to Spatial Resolution in the HRTEM [PDF]
Microscopy and Microanalysis, 1997 Abstract The resolution of the high-resolution transmission electron microscope is limited by the specimen as well as by the HRTEM. For specimens that beam-damage, image resolution depends upon electron energy and electron dose. For small-cell crystalline specimens, Bragg’s law quantizes allowable reso-lutions, preventing image ...
GW Bailey +5 more
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, 2019 SAMPLES. We used a meteorite specimen of 297.8 g in weight, register number IG-A7, from the Colección Nacional de Meteoritas of the Instituto de Geología, Universidad Nacional Autónoma de México (UNAM), Mexico City (figure). For transmission electron microscopy (TEM), a ~ 4 cm long fragment of the large specimen were freshly fractured and cut by using
H. I. Cruz-Rosas +10 more
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Synthesis and Characterization of Tin (IV) Tungstate Nanoparticles – A Solid Acid Catalyst
Bulletin of Chemical Reaction Engineering & Catalysis, 2012 Tin (IV) tungstate, a tetravalent metal acid salt was synthesized in the nanoform by chemical coprecipitation method using EDTA as capping agent. The material was found to be stable in mineral acids, bases and organic solvents except in HF and aquaregia.
Manoj Sadanandan, Beena Raveendran
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Pushing the limits of high-resolution polymer microscopy using antioxidants
Nature Communications, 2021 High-resolution transmission electron microscopy (HRTEM) has been transformative to the field of polymer science but most HRTEM studies are limited by beam damage on the material.
Brooke Kuei, Enrique D. Gomez
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Condensed Matter, 2020 High-resolution TEM (HRTEM) is a powerful tool for structure characterization. However, methylammonium lead iodide (MAPbI3) perovskite is highly sensitive to electron beams and easily decomposes into lead iodide (PbI2).
Yu-Hao Deng
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Characterization of the T'-Phase Interface in Al-Zn-Mg Alloy Along the <112> Zone Direction of Al-Matrix [PDF]
Archives of Metallurgy and MaterialsIn this study, we observed the T'-phase for the first time along the zone axis of the Al matrix. The orientation relationship, shape, misfit value, and interfacial conditions between the T'-phase and the Al matrix were investigated using highresolution ...
A. Ahmed +10 more
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Defect modeling in HRTEM image simulation
Proceedings, annual meeting, Electron Microscopy Society of America, 1991 One practical problem in High Resolution Transmission Electron Microscopy (HRTEM) image simulation is the creation of atomistic models of defect structures. The ideal crystal structures are readily represented by a relatively small number of “basis” atoms and the crystallographic space group.
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HRTEM STUDY OF THE SUPERLATTICE ORTHOCLASE
Acta Physica Sinica, 1989 An HRTEM study was carried out for the orthoclase (Or65 Ab21 An11) taken from the augite-mozonite deposit in Wuliang, Shandong Province. The results showed that this material consists of superlattice with long period. The relationship between extended cell parameter and triclinic subcell parameter is as follows: a=atc, b = 8d010≈8btc c= ctc, β= βtc (tc
null XU HUI-FANG +3 more
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