Atom-Scale Ptychographic Electron Diffractive Imaging of Boron Nitride Cones Academic Article uri icon

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.

authors

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

publication date

  • February 14, 2012