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- W3036247003 abstract "In order to visualize the crystal structure in an atomic scale by high-resolution transmission electron microscopy (HRTEM), as many of the scattered waves as possible must be used for imaging. The optimum size of the objective aperture is however limited by both the spherical and chromatic aberrations. The analysis of our 1 MV EM structure images using a computer simulation has shown that the resolution limit of the EM is nearly 2 Å. The aperture size is outlined by a large circle in the diffraction pattern of Fig.1(a), which was taken from a Nb 22 o 54 crystal. The radius is about two times larger than that for recent 100 KV EM equipped with a goniometer stage, which corresponds to the small circle in Fig.1(a), and the number of scattered waves used is then about four times more. (Fig.1) is the corresponding image taken at 1 MV. Comparing to the structure model inserted, it is clear that each cation is resolved as a dark spot. The super-high-resolution of the present EM may be attributable principally to the short wave length of electrons (0.0087 Å at 1 MV) and technically to the high stability of the accelerating voltage." @default.
- W3036247003 created "2020-06-25" @default.
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- W3036247003 date "1980-08-01" @default.
- W3036247003 modified "2023-09-24" @default.
- W3036247003 title "How to Produce and Utilize Super-High-Resolution Structure Images in a High Voltage Electron Microscope" @default.
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- W3036247003 doi "https://doi.org/10.1017/s1431927600006772" @default.
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