title: Element-specific X-ray phase tomography of 3D structures at the nanoscale.
abstract: Recent advances in fabrication techniques to create mesoscopic 3D structures have led to significant developments in a variety of fields including biology, photonics, and magnetism. Further progress in these areas benefits from their full quantitative and structural characterization. We present resonant ptychographic tomography, combining quantitative hard x-ray phase imaging and resonant elastic scattering to achieve ab initio element-specific 3D characterization of a cobalt-coated artificial buckyball polymer scaffold at the nanoscale. By performing ptychographic x-ray tomography at and far from the Co K edge, we are able to locate and quantify the Co layer in our sample to a 3D spatial resolution of 25 nm. With a quantitative determination of the electron density we can determine that the Co layer is oxidized, which is confirmed with microfluorescence experiments.
authors.affiliation: Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.|Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Claire
authors.initials: C
authors.lastname: Donnelly
authors.affiliation: Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Manuel
authors.initials: M
authors.lastname: Guizar-Sicairos
authors.affiliation: Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.|Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Valerio
authors.initials: V
authors.lastname: Scagnoli
authors.affiliation: Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Mirko
authors.initials: M
authors.lastname: Holler
authors.affiliation: Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Thomas
authors.initials: T
authors.lastname: Huthwelker
authors.affiliation: Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Andreas
authors.initials: A
authors.lastname: Menzel
authors.affiliation: Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Ismo
authors.initials: I
authors.lastname: Vartiainen
authors.affiliation: Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Müller
authors.affiliation: Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.|Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Eugenie
authors.initials: E
authors.lastname: Kirk
authors.affiliation: Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.|Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Gliga
authors.affiliation: Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Jörg
authors.initials: J
authors.lastname: Raabe
authors.affiliation: Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.|Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
authors.forename: Laura J
authors.initials: LJ
authors.lastname: Heyderman