No abstract

Structural, electronic, optical, and mechanical properties of cubic SnZrO3 and SnHfO3 have been studied under different hydrostatic pressures within the framework of density functional theory. A strong atomic interaction resulting from a considerable drop in the lattice parameter and bond length was observed. The Sn–O and Hf/Zr–O showed strong ionic and weak covalent characteristics, respectively, and the bond strengths are found to enhance under the applied pressure. Poisson’s ratio of these compounds also supports the bonding nature. The external pressure remarkably changed the optical absorption and conductivity of the materials to a higher value in the UV region of the solar spectrum and the direct bandgap of Sn(Zr/Hf)O3 significantly reduced, thereby enhancing the conductivity. Likewise, in other optical parameters, the elastic properties exhibited some noticeable changes: the stiffness, ductility, anisotropy, hardness, and machinability of these materials were significantly increased due to external pressure. All the findings indicate the high potentiality of these compounds to be used in optoelectronics and photovoltaic applications in the UV spectrum under hydrostatic pressure.

No abstract

<p>As a result of the introduction of new infectious illnesses, key infection prevention measures were implemented. Now, a new coronavirus (SARS-CoV-2) epidemic has expanded swiftly, causing the coronavirus illness 2019 (COVID-19). Many microorganisms spread illness via hospital surfaces due to environmental pollution. This virus has been associated to close contact between persons in tight situations such as houses, hospitals, assisted living, and residential institutions. Aside from health care settings, public buildings, faith-based community centers, marketplaces, transportation, and corporate environments are prone to COVID-19 transmission. Physical contact with the sanitizer device may cause for spread Covid virus. That’s why we have proposed an automatic fogger mechanism-based hand sanitizer that may be able to reduce covid risk. Disinfectant fog will flow when an object will pass through the machine. This project will save cost, time, and wastage along with Covid spreading risk. This project is about designing a good healthcare system. In recent years, sophisticated automation has influenced the health industry. Health care in poor nations is costly. So, the project is an attempt to tackle this issue.</p>