Cryo EM is becoming a powerful tool in observing the structure of biological *** are developing a new computing system to make Cryo EM be more *** introducing some new technologies,such as deep learning,we expect the ...
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Cryo EM is becoming a powerful tool in observing the structure of biological *** are developing a new computing system to make Cryo EM be more *** introducing some new technologies,such as deep learning,we expect the future Cryo EM system being automated and *** an example,this system was used to determine the structure of the secretin
Extended defects(surfaces,interfaces, and dislocations) inmetal oxides are of crucial importance for technological applications, including heterogeneous catalysis and oxide-based electronic and optoelectronic devices....
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Extended defects(surfaces,interfaces, and dislocations) inmetal oxides are of crucial importance for technological applications, including heterogeneous catalysis and oxide-based electronic and optoelectronic devices. Compared to metals and semiconductors, there are more complexities in atomic and electronic structures in metal oxides, leading to difficulties for structural studies at the atomic scale. Recent developments in transmission electron microscopy(TEM) provide us a lot of opportunities for the atomic structureof defects inmetal oxides. With the realization of aberration-correction, the point resolution of TEM has been improved into the milestone 1 Angstrom scale. In addition, the correction of the spherical aberration has almost eliminated the contrast delocalization in high-resolution images. Therefore, high resolution TEM becomes an even more powerful tool than before for materials research at a truly atomic-scale [1]. We have shown that the surface structure of metal oxides can be directly imaged and measured at the sub-angstrom scale [2]. The geometrical positions of all the atomic columns within the surface layers can be measured to an accuracy of picometers, comparable to that obtained by conventional surface science techniques on single crystals [2-3]. Here, we will present our recent works on atomic and electronic structure of surfaces of FeO and dislocations in ZnO.
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