Publications by authors named "Y Golan"
Cuprous oxide (CuO) thin films were chemically deposited from a solution onto GaAs(100) and (111) substrates using a simple three-component solution at near-ambient temperatures (10-60 °C). Interestingly, a similar deposition onto various other substrates including Si(100), Si(111), glass, fluorine-doped tin oxide, InP, and quartz resulted in no film formation. Films deposited on both GaAs(100) and (111) were found alongside substantial etching of the substrates.
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- * The research highlights that both the nucleation and growth stages of the ZnS films are significantly affected by the type of Zn precursor used, and emphasizes the importance of early film formation stages on overall film quality.
- * Techniques like X-ray photoelectron spectroscopy and transmission electron microscopy reveal that increased surface oxidation during the early stages can prevent solution desorption, and an analysis of crack formation provides insights into the growth process of the films based on different precursors.
Article Synopsis
- - We investigated the properties of ZnS nanowires and nanorods that are capped with surfactants, focusing on their behavior in organic suspensions and how their photoluminescence changes with concentration and washing cycles.
- - Photoluminescence emissions increased when the concentration of nanoparticles decreased, suggesting that the arrangement of nanostructures plays a significant role in their light-emitting behavior.
- - Techniques like synchrotron small angle X-ray scattering revealed complex liquid-crystal-like structures in the nanoparticles, with a hexagonal structure for nanowires and a more intricate arrangement for nanorods, indicating optimal photoluminescence relies on a specific amount of surfactant on their surface.
The unusual defect chemistry of thorium doping in the PbS system was investigated computationally to answer several open questions arising from the experimental observations. These include finding Th in a +4 oxidation state in contrast to Pb, attracting more than two oxygen atoms on average per thorium and affecting the growth morphology of PbS and its electronic properties. We find Th to be energetically stable at the lead lattice position in PbS and to attract 2-3 oxygens, including in the adjacent interstitial position, which binds strongly to Th.
View Article and Find Full Text PDFHybrid immunity against SARS-CoV-2 has not been well studied in pregnancy. We conducted a comprehensive analysis of neutralizing antibodies (nAb) and binding antibodies in pregnant individuals who received mRNA vaccination, natural infection, or both. A third vaccine dose augmented nAb levels compared to the two-dose regimen or natural infection alone; this effect was more pronounced in hybrid immunity.
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