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Abstract: Samples of wind turbine blade surface have been covered with a superhydrophobic coating made of silica nanoparticles embedded in commercial epoxy paint. The superhydrophobic surfaces have a water contact angle around 152°, a hysteresis less than 2° and a water drop sliding angle around 0.5°. These surfaces are water repellent so that water drops cannot remain motionless on the surface. Examination of coated and uncoated surfaces with scanning electron microscopy and atomic force microscopy, together with measurements of water contact angles, indicates that the air trapped in the cavity enhances the water repellency similarly to the lotus leaf effect. Moreover, this new coating is stable under UVC irradiation and water pouring. The production of this nanoscale coating film being simple and low cost, it can be considered as a suitable candidate for water protection of different outdoor structures. [Copyright &y& Elsevier]

Summary: Due to the increasing energy demand and to help integrate renewable energy into the energy mix, large‐scale energy storage has become essential. Among the different large‐scale secondary battery technologies, zinc‐ion batteries (ZIBs) have attracted huge attention due to their lower cost, better safety, and environmental positivity. The aqueous electrolyte in ZIBs allows the batteries to be constructed under normal atmospheric conditions and substantially reduces the assembling complexity. However, due to its low working voltage, cathode materials are often restricted, and rectifying voltage is a crucial function. Increasing the cathode voltage necessitates an increase in the electrolyte's thermodynamic stability. Additionally, the process of zinc‐ion storage should be studied in greater depth and new variants of characterization can be used to precisely understand the storage mechanism. In this regard, this article has reviewed with recent research findings addressing these issues and possible advancements made in the ZIB technology, highlighting future possibilities. [ABSTRACT FROM AUTHOR]

The magnesium based spinel chalcogenides are outstanding materials for spintronic technology and energy applications. Herein, the modified Becke Johnson potential (TB-mBJ) was employed to investigate the electrical, ferromagnetism, and thermoelectric properties of MgDy 2 (S/Se) 4 spinels comprehensively. The energy emitted during optimization as well as formation energy has both been used to demonstrate the stability of the cubic phase. The density of states, Curie temperature, exchange coupling, and spin polarization are elaborated to address the nature of ferromagnetism. Further, half metallic ferromagnetism is studied in terms of hybridization, exchange energies, and exchange constants. In contrast to the clustering effect of the internal magnetic of Dy atoms in the structure, the lowering of Dy's magnetic moment and its transferring on Mg, and S/Se sites demonstrate that the ferromagnetism is caused by the exchange of electron spin. Furthermore, thermoelectric properties were studied and various thermoelectric parameters such as electrical and thermal conductivities, Seebeck coefficient (S), and power factor (PF) of the examined spinels have been determined. • Above room temperature ferromagnetism, and spintronic applications. • Quantum spin of electrons dominant the charge with multifuctional properties. • Exchange mechanism certifies the ferromagnetism by electron spin instead of magnetic ion clustering. • Half metallic ferromagnetism and 100 % spin polarization. • Large value of electrical conductivity and ultralow low values of thermal conductivity. [ABSTRACT FROM AUTHOR]

Copper sulphide (Cu x S) thin films were deposited by the spin coating method using copper acetate (Cu₂(CH₃COO)₄) and thiourea (CH₄N₂S) as precursors. This simple technique was shown to produce thin films with high quality in terms of tunable stoichiometry and physical properties. In fact, the room temperature structural, optical and thermoelectric properties were studied. It is observed that the annealing during 1 h at 250 °C and 300 °C results in the transition from the covellite (CuS) to the chalcocite (Cu 2 S) and djurleite (Cu 1.95 S) phases, respectively. Optical measurements show the formation of absorbing films in the visible range with a transmittance lower than 50 % for all phases. The covellite phase is found to be thermoelectrically interesting with a power factor of 12.3 μWK−2m−1, while the conductivity of the djurleite phase (281.7 Ω−1cm−1) needs to be improved to match its high Seebeck coefficient (21.3 μVK−1). [ABSTRACT FROM AUTHOR]

The spintronic is an emerging technology which controls the properties of multifactional devices with spin of electrons. In present manuscript, Wien2k and Boltz Trap codes are used to explore electronic, magnetic, and thermoelectric characteristics of Sr 2 CrXO 6 (X = Nb, Mo) double perovskites (DPs). The evaluation of energies released in paramagnetic (PM), antiferromagnetic (AFM), and ferromagnetic (FM) states assure the stability of FM states. Both the negative formation energy and the tolerance factor confirm structural and thermodynamic stability in FM states. The 100 % spin polarization was confirmed by both integer values of magnetic moment (MM) and the spin polarization factor. The values of exchange energy, double exchange model, hybridization of p-d states, and exchange constants are calculated to explore the nature of ferromagnetism and spin functionality. The effect of thermoelectric parameters on spin of electrons and thermoelectric performance are elaborated by thermal to electrical conductivity ratio, Seebeck coefficient and power factor. • High Curie temperature, and spintronic applications. • Spin of electrons overcome the charge with multifuctional properties. • Double exchange mechanism confirms the ferromagnetism by electron spin instead of magnetic ion clustering. • Half metallic ferromagnetism and 100 % spin polarization. • Large value of electrical conductivity and low values of thermal conductivity. [ABSTRACT FROM AUTHOR]