# FS-PE

 2017-11-1509:36 [PUBDB-2017-12009] Journal Article et al Spiral scanning X-ray fluorescence computed tomography Optics express 25(19), 23424 - 23436 (2017) [10.1364/OE.25.023424]   canning X-ray fluorescence tomography was once considered impractical due to prohibitive measurement time requirements but is now common for investigating metal distributions within small systems. A recent look-ahead to the possibilities of 4$^{th}$-generation synchrotron light sources [J [...] Restricted: PDF PDF (PDFA); 2017-11-0918:02 [PUBDB-2017-11841] Journal Article et al Towards in situ determination of 3D strain and reorientation in the interpenetrating nanofibre networks of cuticle Nanoscale 9(31), 11249 - 11260 (2017) [10.1039/C7NR02139A]   Determining the in situ 3D nano- and microscale strain and reorientation fields in hierarchical nanocomposite materials is technically very challenging. Such a determination is important to understand the mechanisms enabling their functional optimization [...] OpenAccess: PDF PDF (PDFA); 2017-11-0910:16 [PUBDB-2017-11799] Journal Article et al Probing Transient Valence Orbital Changes with Picosecond Valence-to-Core X-ray Emission Spectroscopy The journal of physical chemistry / C 121(5), 2620 - 2626 (2017) [10.1021/acs.jpcc.6b12940]   We probe the dynamics of valence electrons in photoexcited [Fe(terpy)$_2$]$^{2+}$ in solution to gain deeper insight into the Fe−ligand bond changes. We use hard X-rayemission spectroscopy (XES), which combines element specificity and high penetration with sensitivity to orbital structure, making it a powerful technique for molecular studies in a wide variety of environments. [...] Fulltext: PDF; Restricted: PDF PDF (PDFA); 2017-10-3014:18 [PUBDB-2017-11630] Journal Article et al Iridium double perovskite $Sr_{2}YIrO_{6}$ : A combined structural and specific heat study Physical review / B 95(6), 064418 (2017) [10.1103/PhysRevB.95.064418]   Recently, the iridate double perovskite Sr2YIrO6 has attracted considerable attention due to the report of unexpected magnetism in this Ir$^{5+}$ (5d$^{4}$) material, in which according to the J$_{eff}$ model, a nonmagnetic ground state is expected. However, in recent works on polycrystalline samples of the series Ba$_{2-x}$Sr$_{x}$YIrO$_{6}$ no indication of magnetic transitions have been found [...] OpenAccess: PDF PDF (PDFA); 2017-10-3014:08 [PUBDB-2017-11625] Journal Article et al In Situ X-ray Diffraction Studies on the De/rehydrogenation Processes of the K$_{2}$[Zn(NH$_{2}$)$_{4}$]-8LiH System The journal of physical chemistry / C 121(3), 1546 - 1551 (2017) [10.1021/acs.jpcc.6b12095]   In this work, the hydrogen absorption and desorption properties of the system K$_2$[Zn(NH$_2$)$_4$]-8LiH are investigated in detail via in situ synchrotron radiation powder X-ray diffraction (SR-PXD), Fourier transform infrared spectroscopy (FT-IR), and volumetric methods. Upon milling, K$_2$[Zn(NH$_2$)$_4$] and 8LiH react to form 4LiNH$_2$-4LiH-K$_2$ZnH$_4$, and then 4LiNH$_2$-4LiH-K$_2$ZnH$_2$ releases H$_2$ in multiple steps [...] Restricted: PDF PDF (PDFA); 2017-10-3013:32 [PUBDB-2017-11623] Journal Article et al Pressure tuning of bond-directional exchange interactions and magnetic frustration in the hyperhoneycomb iridate $\beta$−Li$_{2}$IrO$_{3}$ Physical review / B 96(14), 140402 (2017) [10.1103/PhysRevB.96.140402]   We explore the response of Ir 5d orbitals to pressure in $\beta$−Li$_{2}$IrO$_{3}$, a hyperhoneycomb iridate in proximity to a Kitaev quantum spin-liquid (QSL) ground state. X-ray absorption spectroscopy reveals a reconstruction of the electronic ground state below 2 GPa, the same pressure range where x-ray magnetic circular dichroism shows an apparent collapse of magnetic order [...] OpenAccess: PDF PDF (PDFA); 2017-10-3013:29 [PUBDB-2017-11622] Journal Article et al Structural properties of the thermoelectric material CuCrS$_{2}$ and of deintercalated Cu$_{x}$ CrS$_{2}$ on different length scales: X-ray diffraction, pair distribution function and transmission electron microscopy studies Journal of materials chemistry / C 5(36), 9331 - 9338 (2017) [10.1039/C7TC02983G]   We report on the structural alterations of the thermoelectric material CuCrS$_{2}$ introduced by the removal of 1/3 of the Cu$^+$ ions which are located between CrS$_2$ layers. X-ray diffraction (XRD) and pair distribution function (PDF) analyses revealed a newly formed Cu$_{0.66}$CrS$_2$ phase with monoclinic symmetry and a 3a superstructure [...] 2017-10-3013:26 [PUBDB-2017-11620] Journal Article et al Acoustic Emission from Organic Martensites Angewandte Chemie / International edition 56(28), 8104 - 8109 (2017) [10.1002/anie.201702359]   In salient effects, still crystals of solids that switch between phases acquire a momentum and are autonomously propelled because of rapid release of elastic energy accrued during a latent structural transition induced by heat, light, or mechanical stimulation. When mechanical reconfiguration is induced by change of temperature in thermosalient crystals, bursts of detectable acoustic waves are generated prior to self-actuation [...] Restricted: PDF PDF (PDFA); 2017-10-3013:16 [PUBDB-2017-11615] Journal Article et al Devitrification and hydrogen storage capacity of the eutectic Ca$_{72}$Mg$_{28}$ metallic glass Journal of alloys and compounds 725, 916 - 922 (2017) [10.1016/j.jallcom.2017.07.226]   Very low density eutectic Ca$_{72}$Mg$_{28}$ at.% metallic glass was produced by a rapid solidification melt-spinning process. The glass is considered as being a precursor of more complex ternary Ca-Mg-Zn alloys consisting solely of biocompatible elements with the view to its potential use as bioresorbable alloy for orthopaedic applications [...] Restricted: PDF PDF (PDFA); 2017-10-3013:11 [PUBDB-2017-11612] Journal Article et al Synthesis, structures and thermal decomposition of ammine M$_{x}$B$_{12}$H$_{12}$ complexes (M = Li, Na, Ca) Dalton transactions 46(24), 7770 - 7781 (2017) [10.1039/C7DT01414G]   A series of ammine metal-dodecahydro-closo-dodecaboranes, M$_{x}$B$_{12}$H$_{12}$·nNH$_3$ (M = Li, Na, Ca) were synthesized and their structural and thermal properties studied with in situ time-resolved synchrotron radiation powder X-ray diffraction, thermal analysis, Fourier transformed infrared spectroscopy, and temperature-programmed photographic analysis. The synthesized compounds, Li$_2$B$_{12}$H$_{12}$·7NH$_{3}$, Na$_{2}$B$_{12}$H$_{12}$·4NH$_{3}$ and CaB$_{12}$H$_{12}$·6NH$_{3}$, contain high amounts of NH$_{3}$, 43.3, 26.6 and 35.9 wt% NH$_{3}$, respectively, which can be released and absorbed reversibly at moderate conditions without decomposition, thereby making the closo-boranes favorable ‘host’ materials for ammonia or indirect hydrogen storage in the solid state [...]