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, and Leslie J. Allen
Phys. Rev. Lett. 108, 073901 – Published 14 February 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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  • Received 25 September 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.073901

© 2012 American Physical Society

Authors & Affiliations

Corey T. Putkunz1,*, Adrian J. D’Alfonso1, Andrew J. Morgan1, Matthew Weyland2,3, Christian Dwyer2,3,4, Laure Bourgeois2,3, Joanne Etheridge2,3, Ann Roberts1, Robert E. Scholten1,5, Keith A. Nugent1,5, and Leslie J. Allen1

  • 1School of Physics, The University of Melbourne, Victoria 3010, Australia
  • 2Monash Centre for Electron Microscopy, Monash University, Victoria 3800, Australia
  • 3Department of Materials Engineering, Monash University, Victoria 3800, Australia
  • 4Australian Research Council Centre of Excellence for Design in Light Metals
  • 5Australian Research Council Centre of Excellence for Coherent X-Ray Science

  • *Corresponding author. cputkunz@unimelb.edu.au

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Issue

Vol. 108, Iss. 7 — 17 February 2012

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