Atom-scale ptychographic electron diffractive imaging of boron nitride cones - PubMed (original) (raw)
Atom-scale ptychographic electron diffractive imaging of boron nitride cones
Corey T Putkunz et al. Phys Rev Lett. 2012.
Abstract
Ptychographic coherent diffractive imaging (CDI) has been extensively applied using both x rays and electrons. The extension to atomic resolution has been elusive. This Letter demonstrates ptychographic electron diffractive imaging at atomic resolution, permitting identification of structure in a boron nitride helical cone at a resolution of order 1 Å, beyond that of comparative Z-contrast images. A scanning transmission electron microscope is used to create a diverging illumination in a defocused Fresnel CDI geometry, providing a robust strategy leading to a unique solution.
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