title: Three-dimensional imaging of dislocation propagation during crystal growth and dissolution.
abstract: Atomic-level defects such as dislocations play key roles in determining the macroscopic properties of crystalline materials. Their effects range from increased chemical reactivity to enhanced mechanical properties. Dislocations have been widely studied using traditional techniques such as X-ray diffraction and optical imaging. Recent advances have enabled atomic force microscopy to study single dislocations in two dimensions, while transmission electron microscopy (TEM) can now visualize strain fields in three dimensions with near-atomic resolution. However, these techniques cannot offer three-dimensional imaging of the formation or movement of dislocations during dynamic processes. Here, we describe how Bragg coherent diffraction imaging (BCDI; refs 11, 12) can be used to visualize in three dimensions, the entire network of dislocations present within an individual calcite crystal during repeated growth and dissolution cycles. These investigations demonstrate the potential of BCDI for studying the mechanisms underlying the response of crystalline materials to external stimuli.
authors.affiliation: London Centre for Nanotechnology, University College, London WC1E 6BT, UK.
authors.forename: Jesse N
authors.initials: JN
authors.lastname: Clark
authors.affiliation: School of Chemistry, University of Leeds, Leeds LS2 9JT, UK.
authors.forename: Johannes
authors.initials: J
authors.lastname: Ihli
authors.affiliation: School of Chemistry, University of Leeds, Leeds LS2 9JT, UK.
authors.forename: Anna S
authors.initials: AS
authors.lastname: Schenk
authors.affiliation: School of Chemistry, University of Leeds, Leeds LS2 9JT, UK.
authors.forename: Yi-Yeoun
authors.initials: YY
authors.lastname: Kim
authors.affiliation: School of Chemistry, University of Leeds, Leeds LS2 9JT, UK.
authors.forename: Alexander N
authors.initials: AN
authors.lastname: Kulak
authors.affiliation: School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, UK.
authors.forename: James M
authors.initials: JM
authors.lastname: Campbell
authors.affiliation: Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxon OX11 0DE, UK.
authors.forename: Gareth
authors.initials: G
authors.lastname: Nisbet
authors.affiliation: School of Chemistry, University of Leeds, Leeds LS2 9JT, UK.
authors.forename: Fiona C
authors.initials: FC
authors.lastname: Meldrum
authors.affiliation: London Centre for Nanotechnology, University College, London WC1E 6BT, UK.|Research Complex at Harwell, Didcot, Oxfordshire OX11 0DE, UK.
authors.forename: Ian K
authors.initials: IK
authors.lastname: Robinson