Atom-scale ptychographic electron diffractive imaging of boron nitride cones

Corey T. Putkunz, Adrian J. D'Alfonso, Andrew J. Morgan, Matthew Weyland, Christian Dwyer, Laure Bourgeois, Joanne Etheridge, Ann Roberts, Robert E. Scholten, Keith A. Nugent, Leslie J. Allen

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43 Scopus citations

Abstract

Ptychographic coherent diffractive imaging (CDI) has been extensively applied using both xrays 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, 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.

Original languageEnglish (US)
Article number073901
JournalPhysical Review Letters
Volume108
Issue number7
DOIs
StatePublished - Feb 14 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Putkunz, C. T., D'Alfonso, A. J., Morgan, A. J., Weyland, M., Dwyer, C., Bourgeois, L., Etheridge, J., Roberts, A., Scholten, R. E., Nugent, K. A., & Allen, L. J. (2012). Atom-scale ptychographic electron diffractive imaging of boron nitride cones. Physical Review Letters, 108(7), [073901]. https://doi.org/10.1103/PhysRevLett.108.073901