We performed particle size and particle size distribution measurements for L-cysteine-stabilized ZnS/Mn nanoparticles in the size region below 10 nm. For this we applied transmission electron microscopy (TEM), analytical ultracentrifugation (AUC), dynamic light scattering (DLS), and asymmetric flow field flow fractionation (aF-FFF) measurements, and we calculated particle sizes with the help of...

We report the synthesis and characterization of cubic NaGdF4:Yb/Tm@NaGdF4:Mn core-shell structures. By taking advantage of energy transfer through Yb→Tm→Gd→Mn in these core-shell nanoparticles, we have realized upconversion emission of Mn(2+) at room temperature in lanthanide tetrafluoride based host lattices. The upconverted Mn(2+) emission, enabled by trapping the excitation energy through a ...

Studying catalysts in situ is of high interest for understanding their surface structure and electronic states in operation. Herein, we present a study of epitaxial manganite perovskite thin films (Pr1−xCaxMnO3) active for the oxygen evolution reaction (OER) from electro-catalytic water splitting. X-ray absorption near-edge spectroscopy (XANES) at the Mn Land O K-edges, as well as X-ray photoem...

a feasible and fast method to fabricate hydrogen peroxide sensor was investigated by graphene-manganase nanocomposite carbone paste electrode. in the present work, in first step, the graphene was synthesized by chemical method and in second step, manganese oxide nanoparticle was doped on graphene. graphene-manganase nanocomposite was characterized by ftir and sem. the nanocomposite shows a high...

The successful application of various nanoplatforms in medicine under in vitro conditions has generated some interest in medicine-nanotechnology. The spinel-type MnZn ferrite nano powders were synthesized by Solution Combustion Synthesis (SCS) method. The important classes of soft magnetic materials Mn-Zn ferrites have high magnetic permeability and low power losses.Mn-Zn-Fe2O4 have a spinal st...

Reductive dissolution of redox-sensitive minerals such as manganese (Mn) oxides in natural sediments is an important mechanism for trace element mobilization into groundwater. A gel probe sampler has been constructed to study in situ reductive dissolution of Mn oxides. The gel consists of a polyacrylamide polymer matrix doped with hydrous Mn oxide (HMO). Gel slabs are mounted into a probe, whic...

The structure, magnetic and electrical properties of low-carbon 2% Mn-doped steel manufactured by selective laser melting (3D-steel) casting have been investigated. It was found that after normalization at 980 o C for 30 minutes, 3D-steel becomes structurally similar to cast steel, while the hardness decreases 70% compared annealed 3D-steel. Surface stresses are maximum in as-build three-hour a...