Nanoparticle-Composed Photosensitive Thin Films Based on ZnO.

In this work, atmospheric pulsed laser deposition was used to prepare photosensitive elements. This technology is a practical and relatively inexpensive way of obtaining highly porous nanostructures composed of nanoparticles or nanoaggregates characterized by a large surface-to-volume ratio. Samples were produced via laser nanosecond or picosecond laser ablation of pure ZnO or mixed ZnO-TiO targets on quartz substrates with pre-deposited gold electrodes.

Search for Leptonic Decays of Dark Photons at NA62.

The NA62 experiment at CERN, configured in beam-dump mode, has searched for dark photon decays in flight to electron-positron pairs using a sample of 1.4×10^{17} protons on dump collected in 2021. No evidence for a dark photon signal is observed.

[Prevalence of diabetic retinopathy assessed using two-field mydriatic fundus photography].

Unlabelled: Early detection of diabetic retinopathy (DR) is an urgent ophthalmological problem in Russia and globally.

Purpose: This study assesses the prevalence of asymptomatic retinopathy and attempts to identify risk groups for its development in patients with type 1 and 2 diabetes mellitus (T1DM and T2DM).

Material And Methods: The study involved clinics from 5 cities in the Russian Federation and it included 367 patients with DM, 34.

Structure Engineering of Ni/SiO Vegetable Oil Hydrogenation Catalyst via CeO.

Inspired by our finding that metallic Ni particles could be uniformly distributed on a reduced CeO surface and stabilized on Ce sites, we suppose a possible improvement in the activity and selectivity of the MgNi/SiO vegetable oil hydrogenation catalyst by increasing the surface metal Ni availability via modification by ceria. The proposed approach involved the addition of a CeO modifier to the SiO carrier and as a catalyst component. Evaluation of the structure, reducibility, and surface and electronic states of the CeO-doped MgNi/SiO catalyst was performed by means of the Powder X-ray diffraction (PXRD), Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and X-ray photoelectron spectroscopy (XPS) combined with High-resolution transmission electron microscopy (HRTEM), Temperature-programmed reduction with hydrogen (H2-TPR), and H-chemisortion techniques.

Hydrothermally Synthesized ZnCr- and NiCr-Layered Double Hydroxides as Hydrogen Evolution Photocatalysts.

The layered double hydroxides (LDHs) of transition metals are of great interest as building blocks for the creation of composite photocatalytic materials for hydrogen production, environmental remediation and other applications. However, the synthesis of most LDHs is reported only by the conventional coprecipitation method, which makes it difficult to control the catalyst's crystallinity. In the present study, ZnCr- and NiCr-LDHs have been successfully prepared using a facile hydrothermal approach.