# FS-PETRA

 2017-08-3111:03 [PUBDB-2017-10179] Journal Article et al Imaging at an x-ray absorption edge using free electron laser pulses for interface dynamics in high energy density systems Review of scientific instruments 88(5), 053501 (2017) [10.1063/1.4982166]   Tuning the energy of an x-ray probe to an absorption line or edge can provide material-specific measurements that are particularly useful for interfaces. Simulated hard x-ray images above the Fe K-edge are presented to examine ion diffusion across an interface between Fe$_2$O$_3$ and SiO$_2$ aerogel foam materials [...] OpenAccess: PDF PDF (PDFA); 2017-08-2616:35 [PUBDB-2017-09888] Dissertation / PhD Thesis Stierle, A. Resonant Hard X-ray Ptychography for High-Sensitivity Imaging with Chemical Contrast 125 pp. (2017) [10.3204/PUBDB-2017-09888] = University of Hamburg, Diss., 2017   For the detailed investigation of biological, chemical or physical processes on the nano scale, high-resolution imaging techniques are essential. For this purpose, the coherentimaging technique – X-ray ptychography – has been established in recent years. [...] OpenAccess: PDF PDF (PDFA); 2017-07-2519:31 [PUBDB-2017-08515] Dissertation / PhD Thesis Stierle, A. Resonant Hard X-ray Ptychography for High-Sensitivity Imaging with Chemical Contrast 124 pp. (2017) = University of Hamburg, Diss., 2017 2017-06-2313:44 [PUBDB-2017-05999] Journal Article et al Evolutionary-Optimized Photonic Network Structure in White Beetle Wing Scales Advanced materials N.A., 1702057 - (2017) [10.1002/adma.201702057] 2017-06-0213:56 [PUBDB-2017-04214] Journal Article et al Stability of a Bifunctional Cu-Based Core@Zeolite Shell Catalyst for Dimethyl Ether Synthesis Under Redox Conditions Studied by Environmental Transmission Electron Microscopy and In Situ X-Ray Ptychography Microscopy and microanalysis 23(03), 501 - 512 (2017) [10.1017/S1431927617000332]   When using bifunctional core@shell catalysts, the stability of both the shell and core–shell interface is crucial for catalytic applications. In the present study, we elucidate the stability of a CuO/ZnO/Al$_2$O$_3$@ZSM-5 core@shell material, used for one-stage synthesis of dimethyl ether from synthesis gas. [...] Restricted: PDF PDF (PDFA); 2017-03-0723:01 [PUBDB-2017-01322] Journal Article et al Structure and Composition of Isolated Core-Shell (In, Ga) N/GaN Rods Based on Nanofocus X-Ray Diffraction and Scanning Transmission Electron Microscopy Physical review applied 7(2), 024033 (2017) [10.1103/PhysRevApplied.7.024033]   Nanofocus x-ray diffraction is used to investigate the structure and local strain field of an isolated (In,Ga)N/GaN core-shell microrod. Because the high spatial resolution of the x-ray beam is only 80×90  nm$^2$, we are able to investigate several distinct volumes on one individual side facet. [...] OpenAccess: PDF; 2017-03-0722:35 [PUBDB-2017-01321] Journal Article et al Focusing hard x rays beyond the critical angle of total reflection by adiabatically focusing lenses Applied physics letters 110(10), 101103 (2017) [10.1063/1.4977882]   In response to the conjecture that the numerical aperture of x-ray optics is fundamentally limited by the critical angle of total reflection [Bergemann et al., Phys. Rev. [...] OpenAccess: PDF; 2017-03-0311:23 [PUBDB-2017-01280] Journal Article et al Perfect X-ray focusing via fitting corrective glasses to aberrated optics Nature Communications 8, 14623 (2017) [10.1038/ncomms14623]   Due to their short wavelength, X-rays can in principle be focused down to a few nanometres and below. At the same time, it is this short wavelength that puts stringent requirements on X-ray optics and their metrology [...] OpenAccess: PDF; 2016-12-1218:59 [PUBDB-2016-06117] Bachelor Thesis Lindemann, H. Entwicklung einer Vakuumröhre für einenSpeicherring-Röntgenstrahl-Messplatz 86 pp. (2016) [10.3204/PUBDB-2016-06117] = Hamburg University of Applied Sciences, Bachelorarbeit, 2016   Content of this report is the methodical development and construction of a lengthadjustablevacuum tube for scientific experiments. Aim of the development is to optimizethe experiment and to increase the flexibility. [...] OpenAccess: PDF PDF (PDFA); 2016-12-0211:03 [PUBDB-2016-05838] Journal Article et al Tracking the density evolution in counter-propagating shock waves using imaging X-ray scattering Applied physics letters 109(3), 031108 (2016) [10.1063/1.4959256]   We present results from time-resolved X-ray imaging and inelastic scattering on collective excitations. These data are then employed to infer the mass density evolution within laser-driven shock waves. [...] OpenAccess: PDF PDF (PDFA);