# FS-PETRA

 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); 2016-11-2713:14 [PUBDB-2016-05652] Journal Article et al Beamstop-Based Low-Background Ptychography to Image Weakly Scattering Objects Ultramicroscopy 173, 52 - 57 (2017) [10.1016/j.ultramic.2016.11.005]   In recent years, X-ray ptychography has been established as a valuable tool for high-resolution imaging. Nevertheless, the spatial resolution and sensitivity in coherent diffraction imaging are limited by the signal that is detected over noise and over background scattering. [...] Restricted: PDF PDF (PDFA); 2016-11-2322:42 [PUBDB-2016-05569] Journal Article et al Quantitative characterization of aberrations in X-ray optics SPIE Optical Engineering + Applications, Meeting locationSan Diego, California, Proceedings of SPIE 9963, 99630P (2016) [10.1117/12.2237646]   Due to the weak interaction of X-rays with matter and their small wavelength on the atomic scale, stringent requirements are put on X-ray optics manufacturing and metrology. As a result, these optics often suffer from aberrations. [...] OpenAccess: PDF PDF (PDFA); 2016-11-2322:27 [PUBDB-2016-05568] Journal Article et al In Situ Ptychography of Heterogeneous Catalysts using Hard X-Rays: High Resolution Imaging at Ambient Pressure and Elevated Temperature Microscopy and microanalysis 22(01), 178 - 188 (2016) [10.1017/S1431927615015573]   A new closed cell is presented for in situ X-ray ptychography which allows studies under gas flow and at elevated temperature. In order to gain complementary information by transmission and scanning electron microscopy, the cell makes use of a Protochips E-chipTM which contains a small, thin electron transparent window and allows heating. [...] Restricted: PDF PDF (PDFA); 2016-11-2322:22 [PUBDB-2016-05567] Journal Article et al X-rays Reveal the Internal Structure of Keratin Bundles in Whole Cells ACS nano 10(3), 3553 - 3561 (2016) [10.1021/acsnano.5b07871]   In recent years, X-ray imaging of biological cells has emerged as a complementary alternative to fluorescence and electron microscopy. Different techniques were established and successfully applied to macromolecular assemblies and structures in cells. [...] Published on 2016-02-23. Available in OpenAccess from 2017-02-23.: PDF; Restricted: PDF;