# FS-PE

 2018-02-0813:51 [PUBDB-2018-01139] Journal Article et al Quantized Self-Assembly of Discotic Rings in a Liquid Crystal Confined in Nanopores Physical review letters 120(6), 067801 (2018) [10.1103/PhysRevLett.120.067801]   Disklike molecules with aromatic cores spontaneously stack up in linear columns with high, one-dimensional charge carrier mobilities along the columnar axes, making them prominent model systems for functional, self-organized matter. We show by high-resolution optical birefringence and synchrotron-based x-ray diffraction that confining a thermotropic discotic liquid crystal in cylindrical nanopores induces a quantized formation of annular layers consisting of concentric circular bent columns, unknown in the bulk state. [...] OpenAccess: PDF PDF (PDFA); 2018-01-2416:35 [PUBDB-2018-00789] Bachelor Thesis Roth, S. Nanostrukturierung durch Sprühdeposition 82 pp. (2017) [10.3204/PUBDB-2018-00789] = Bachelorarbeit, University of Hamburg, 2017   Diese Bachelorarbeit wurde unter der Leitung von Prof. Dr. [...] OpenAccess: PDF PDF (PDFA); 2018-01-1715:59 [PUBDB-2018-00674] Journal Article et al Near-K -edge single, double, and triple photoionization of $C^{+}$ ions Physical review / A 97(1), 013409 (2018) [10.1103/PhysRevA.97.013409]   Single, double, and triple ionization of the $C^{+}$ ion by a single photon have been investigated in the energy range 286 to 326 eV around the K-shell single-ionization threshold at an unprecedented level of detail. At energy resolutions as low as 12 meV, corresponding to a resolving power of 24 000, natural linewidths of the most prominent resonances could be determined [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2018-01-1215:44 [PUBDB-2018-00633] Journal Article et al Radial Growth of Self-Catalyzed GaAs Nanowires and the Evolution of the Liquid Ga-Droplet Studied by Time-Resolved in Situ X-ray Diffraction Nano letters 18(1), 101 - 108 (2018) [10.1021/acs.nanolett.7b03486]   We report on a growth study of self-catalyzed GaAs nanowires based on time-resolved in situ X-ray structure characterization during molecular-beam-epitaxy in combination with ex situ scanning-electron-microscopy. We reveal the evolution of nanowire radius and polytypism and distinguish radial growth processes responsible for tapering and side-wall growth. [...] Fulltext: PDF PDF (PDFA); 2018-01-1210:22 [PUBDB-2018-00593] Journal Article et al Accurate prediction of X-ray pulse properties from a free-electron laser using machine learning Nature Communications 8, 15461 (2017) [10.1038/ncomms15461]   Free-electron lasers providing ultra-short high-brightness pulses of X-ray radiation have great potential for a wide impact on science, and are a critical element for unravelling the structural dynamics of matter. To fully harness this potential, we must accurately know the X-ray properties: intensity, spectrum and temporal profile [...] OpenAccess: PDF PDF (PDFA); 2018-01-1209:43 [PUBDB-2018-00582] Journal Article et al Structural and Magnetic Transitions in CaCo$_{3}$V$_{4}$O$_{12}$ Perovskite at Extreme Conditions Inorganic chemistry 56(11), 6251 - 6263 (2017) [10.1021/acs.inorgchem.7b00330]   We investigated the structural, vibrational, magnetic, and electronic properties of the recently synthesized CaCo$_{3}$V$_{4}$O$_{12}$ double perovskite with the high-spin (HS) Co$^{2+}$ ions in a square-planar oxygen coordination at extreme conditions of high pressures and low temperatures. The single-crystal X-ray diffraction and Raman spectroscopy studies up to 60 GPa showed a conservation of its cubic crystal structure but indicated a crossover near 30 GPa. [...] Published on 2017-05-18. Available in OpenAccess from 2018-05-18.: PDF PDF (PDFA); Restricted: PDF PDF (PDFA); 2018-01-1208:18 [PUBDB-2018-00573] Journal Article et al Ir–Re binary alloys under extreme conditions and their electrocatalytic activity in methanol oxidation Acta materialia 139, 236 - 243 (2017) [10.1016/j.actamat.2017.08.012]   The formation of the hcp-Ir$_{0.70}$Re$_{0.30}$ alloy from the single-source precursor (NH4)2[Ir$_{0.70}$Re$_{0.30}$Cl$_6$] upon heating in hydrogen atmosphere can be associated with the formation of two intermediates: a crystalline iridium-based intermediate and a fcc-structured alloy. Ir–Re alloys show lower thermal expansion coefficients and smaller compressibility in comparison with individual metals. [...] Published on 2017-08-10. Available in OpenAccess from 2018-08-10.: PDF PDF (PDFA); Restricted: PDF PDF (PDFA); 2018-01-1115:47 [PUBDB-2018-00542] Journal Article et al Synthesis of a polar ordered oxynitride perovskite Physical review / B 95(21), 214120 (2017) [10.1103/PhysRevB.95.214120]   For decades, numerous attempts have been made to produce polar oxynitride perovskites, where some of the oxygen is replaced by nitrogen, but a polar ordered oxynitride has never been demonstrated. Caracas and Cohen [Appl [...] OpenAccess: PDF PDF (PDFA); 2018-01-1115:41 [PUBDB-2018-00538] Journal Article et al Stability of iron-bearing carbonates in the deep Earth’s interior Nature Communications 8, 15960 (2017) [10.1038/ncomms15960]   The presence of carbonates in inclusions in diamonds coming from depths exceeding 670 km are obvious evidence that carbonates exist in the Earth’s lower mantle. However, their range of stability, crystal structures and the thermodynamic conditions of the decarbonation processes remain poorly constrained [...] OpenAccess: PDF PDF (PDFA); 2018-01-1113:12 [PUBDB-2018-00481] Journal Article et al Thermal behavior and decomposition of cerium(III) butanoate, pentanoate and hexanoate salts upon heating in argon   The thermal behavior and decomposition of Ce-butanoate monohydrate (Ce(C3H7CO2)3·H2O), Ce-pentanoate (Ce(C4H9CO2)3) and Ce-hexanoate (Ce(C5H11CO2)3) were studied in a flow of argon while heating at 5 °C/min. By means of several techniques such as simultaneous TG-DTA, FTIR evolved gas analysis, in-situ x-ray diffraction using a synchrotron source and hot-stage microscopy, it was found that all three compounds undergo melting transitions prior to decomposition and that decomposition involves intermediate stages including at least a Ce2O(CnH2n+1CO2)4 intermediate (n = 3, 4 or 5 for Ce-butanoate, pentanoate or hexanoate respectively). 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