TiO2 nanorod arrays based on substrates with heterogeneous crystal structures and remarkable crystalline stability have potential as promising photocatalysts. Researchers synthesized a 1D anatase/rutile heterogeneous TiO2 crystal structure in a hierarchical architecture by forming hybrid organic–inorganic interfaces in a solution-based environment. Read more »
Journal Covers
Structure-based Design of Pyridone–Aminal eFT508 Targeting Dysregulated Translation by Selective Mitogen-activated Protein Kinase Interacting Kinases 1 and 2 (MNK1/2) Inhibition
Dysregulated translation drives key hallmarks of cancer and is controlled by Phase 2 candidate eFT508 binding to the MNK protein, exploiting stereoelectronic interactions, critical to the compound’s selectivity and potency. Read more »
CO Adsorption on Pd(100) Studied by Multimodal Ambient Pressure X-Ray Photoelectron and Infrared Reflection Absorption Spectroscopies
The first combined infrared spectroscopy and ambient-pressure XPS study was demonstrated at Beamline 11.0.2. The in situ vibrational and core-level spectroscopies in the Torr pressure range offer complementary information on the properties of surfaces and adsorbates while closing the pressure gap between laboratory measurements and applications. The multimodal spectroscopy also allowed the identification of the C 1s binding energy and quantification of an uncommon atop CO species on a Pd(100) surface. Read more »
Structure of Nanoscale-Pitch Helical Phases: Blue Phase and Twist-Bend Nematic Phase Resolved by Resonant Soft X-Ray Scattering
Resonant soft x-ray scattering (RSoXS) at the carbon K-edge was used to probe periodic structures of phases with orientational molecular order but homogeneous electron density distribution. This approach can be applied to structures with periodicities below the optical wavelength, to which neither optical nor classical x-ray diffraction techniques are sensitive. Read more »
Elucidating the mechanism of MgB2 initial hydrogenation via a combined experimental–theoretical study
Magnesium borohydride Mg(BH4)2 is a promising solid-state hydrogen-storage material, releasing 14.9 wt% hydrogen upon conversion to MgB2. Although several dehydrogenation pathways have been proposed, the hydrogenation process is less well understood. This study elucidates the key atomistic mechanisms associated with the initial stages of hydrogen uptake within MgB2. Read more »
Amorphous calcium carbonate particles form coral skeletons
Skeletons of Stylophora pistillata corals form by the attachment of amorphous calcium carbonate precursor particles, formed within the coral tissue, to the coral skeleton surface. This mechanism is faster than the precipitation of ions from solution and may render the corals less susceptible to ocean acidification than previously assumed. Read more »
In Situ Electrical Resistance and X-Ray Tomography Study of Copper–Tin Polymer Composites during Thermal Annealing
In situ electrical conductivity and x-ray tomography experiments were conducted on a conductive polymer composite containing polyvinylidene fluoride (PVDF) copolymer, copper (Cu), and tin (Sn) during thermal annealing. This study provides detailed insight into the morphological origins of the beneficial effect of thermal annealing on the electrical properties of conductive composites containing low melting metal fillers. Read more »
Electronic Phase Separation and Dramatic Inverse Band Renormalization in the Mixed-Valence Cuprate LiCu2O2
Angle-resolved photoemission spectroscopy was used to measure the electronic structure of LiCu2O2, a mixed-valence cuprate where planes of Cu(I) (3d10) ions are sandwiched between layers containing one-dimensional edge-sharing Cu(II) (3d9) chains. Read more »
Near-Edge X-Ray Refraction Fine Structure Microscopy
Soft x-ray ptychography was used to measure the absorption and refraction of x-rays through pristine reference materials as a basis for decomposing spatially resolved spectra from a heterogeneous sample, thereby quantifying the composition at high resolution. The novel method provided a nearly five-fold improvement in spatial resolution on resonance. Read more »
Ambient Pressure XPS and IRRAS Investigation of Ethanol Steam Reforming on Nickel–Ceria Catalysts
Ambient-pressure x-ray photoelectron spectroscopy (AP-XPS) and infrared reflection absorption spectroscopy (AP-IRRAS) have been used to elucidate the active sites and mechanistic steps associated with the ethanol steam reforming reaction (ESR) over Ni–CeO2(111) model catalysts. Read more »
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