title: Atom-scale ptychographic electron diffractive imaging of boron nitride cones.
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.affiliation: School of Physics, The University of Melbourne, Victoria 3010, Australia. cputkunz@unimelb.edu.au
authors.forename: Corey T
authors.initials: CT
authors.lastname: Putkunz
authors.forename: Adrian J
authors.initials: AJ
authors.lastname: D'Alfonso
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Morgan
authors.forename: Matthew
authors.initials: M
authors.lastname: Weyland
authors.forename: Christian
authors.initials: C
authors.lastname: Dwyer
authors.forename: Laure
authors.initials: L
authors.lastname: Bourgeois
authors.forename: Joanne
authors.initials: J
authors.lastname: Etheridge
authors.forename: Ann
authors.initials: A
authors.lastname: Roberts
authors.forename: Robert E
authors.initials: RE
authors.lastname: Scholten
authors.forename: Keith A
authors.initials: KA
authors.lastname: Nugent
authors.forename: Leslie J
authors.initials: LJ
authors.lastname: Allen