Playing the platinum card: By means of a self‐organization process at low temperature in organic solvent, porous platinum nanoparticles of excellent dispersity have been prepared. The particles are obtained as flowerlike arrays (see TEM image), and their porosity was shown to be similar to other mesoporous Pt systems. The catalytic activity of the nanoparticles is shown to be ≈60 % greater than a commercial Pt catalyst.

An all-inorganic lead-free halides Cs−Cu−I system, represented by Cs 3 Cu 2 I 5 and CsCu 2 I 3 , has attracted attention for their good photophysical characteristics recently. Successive works had reported their application potential in light-emitting devices. However, there is no report for CsCu 2 I 3 in X-ray scintillation detectors so far. We notice that CsCu 2 I 3 may be advantageous in such an application due to the one-dimensional crystal structure, the congruent-melting feature, and the high spectral matching to some photosensors. In this work, we explore the scintillation properties and imaging application of CsCu 2 I 3 in X-ray scintillator detector. The oriented structure is designed to enhance the imaging performance of a CsCu 2 I 3 detector. Close-space sublimation process and nanoscale seed screening strategy are employed to realize this design by producing a large-area (25 cm 2 ) CsCu 2 I 3 thick film layer with the oriented nanorod structure. This CsCu 2 I 3 detector eventually achieves a high spatial resolution of 7.5 lp mm −1 in X-ray imaging.

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S2 1Àcaa measured 1Àcaa complete (1) was calculated from the axial ratio (c/a) measured , where c and a are the lattice parameters of the tetragonal phase, evaluated from FePt (001) and FePt (110) peaks. The axial ratio for fully ordered-L1 0 fct phase (c/a) complete for FePt is 0.9657. Magnetic properties were characterized at room temperature, in a Lake Shore 7400 vibrating samples magnetometry (VSM) instrument using applied magnetic fields up to 2000 mT. The hysteresis loops were measured on the nanoparticle films with the applied magnetic field both parallel (in-plane) and perpendicular (out-of-plane) to the substrate surface.