title: X-ray nanotomography using near-field ptychography.
abstract: Propagation-based imaging or inline holography in combination with computed tomography (holotomography) is a versatile tool to access a sample's three-dimensional (3D) micro or nano structure. However, the phase retrieval step needed prior to tomographic reconstruction can be challenging especially for strongly absorbing and refracting samples. Near-field ptychography is a recently developed phase imaging method that has been proven to overcome this hurdle in projection data. In this work we extend near-field ptychography to three dimensions and we show that, in combination with tomography, it can access the nano structure of a solid oxide fuel cell (SOFC). The quality of the resulting tomographic data and the structural properties of the anode extracted from this volume were compared to previous results obtained with holotomography. This work highlights the potential of 3D near-field ptychography for reliable and detailed investigations of samples at the nanometer scale, with important applications in materials and life sciences among others.
authors.forename: Marco
authors.initials: M
authors.lastname: Stockmar
authors.forename: Maxime
authors.initials: M
authors.lastname: Hubert
authors.forename: Martin
authors.initials: M
authors.lastname: Dierolf
authors.forename: Bjoern
authors.initials: B
authors.lastname: Enders
authors.forename: Richard
authors.initials: R
authors.lastname: Clare
authors.forename: Sebastian
authors.initials: S
authors.lastname: Allner
authors.forename: Andreas
authors.initials: A
authors.lastname: Fehringer
authors.forename: Irene
authors.initials: I
authors.lastname: Zanette
authors.forename: Julie
authors.initials: J
authors.lastname: Villanova
authors.forename: Jérôme
authors.initials: J
authors.lastname: Laurencin
authors.forename: Peter
authors.initials: P
authors.lastname: Cloetens
authors.forename: Franz
authors.initials: F
authors.lastname: Pfeiffer
authors.forename: Pierre
authors.initials: P
authors.lastname: Thibault