Owing to the development of aberration correctors in electron microscopy, lateral resolution (X-Y directions) has been improved down to ~40 pm in scanning transmission electron microscopy (STEM) [1]. Meanwhile the… Click to show full abstract
Owing to the development of aberration correctors in electron microscopy, lateral resolution (X-Y directions) has been improved down to ~40 pm in scanning transmission electron microscopy (STEM) [1]. Meanwhile the resolution in depth (Z) direction has recently gained much interests as it is important when mapping the whole 3-dimensional (3D) structure of a specimen [2]. It is effective to use a beam with
               
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