Publications by authors named "A I Katsman"
Lead-halide hybrid perovskites (RNHPbX, X = halide, e.g., Cl, Br, I; R = organic moiety) show promise for next-generation optoelectronic devices due to their simple synthesis routes, strong light absorption, and high photoluminescence quantum yield.
View Article and Find Full Text PDFThe inherited chemical inhomogeneity in oxide layers obtained by plasma electrolytic oxidation (PEO) on the magnesium alloy MgYZn is associated to long-period stacking-ordered (LPSO) phase present in the treated alloy. This heterogeneity results in decrease of corrosion resistance and adhesion strength. The problem was solved by adding silica nanoparticles (NPs) into the electrolyte under PEO.
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- - The study explores the use of crystallographic defects, particularly twin boundaries, in gold (Au) substrates to enhance the growth of semiconductor nanocrystals like gold(I)-cyanide (AuCN), which have various applications.
- - It discusses how twin boundaries create ledges that expose new crystal facets, facilitating the directed growth of AuCN on these surfaces in specific orientations.
- - The findings suggest that controlling this growth could lead to nanoscale patterning of semiconductors, allowing adjustments to their properties, especially the band gap, which is crucial for electronic and optical applications.
Organisms deposit various biominerals in the course of their biomineralisation. The most abundant of these is calcium carbonate, which manifests itself in several polymorphs. While organisms possess the ability to control the specific polymorph deposited, the exact mechanism by which polymorph selection takes place is not yet fully understood.
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- Many organisms use high-Mg nanoparticles within lower-Mg calcite matrices as a strategy to increase the strength of their skeletons during biomineralization.
- This phase separation process occurs through spinodal decomposition of an amorphous Mg-calcite precursor and is influenced by the organism's Mg content rather than its biological type.
- Evidence shows that only organisms with a magnesium content above 14 mol % exhibit these nanoparticles, highlighting their role in enhancing fracture resistance and hardness in biomineralized materials.