Search

Exceptional category of alloys comprising five or more alloying metals in structures are referred as high entropy alloys. Uniqueness of these alloys have been observed due to the combination of superior mechanical, thermal, conducting, anticorrosion, and other physical properties. Unlike traditional metallic alloys (two metals), the varying elemental compositions led to limitless potential possibilities. Recent research has unveiled an important opportunity for high entropy alloys based nanostructures like nanoparticles and nanocomposites. This state-of-the-art review is basically intended to highlight the design and essential structure, property, and applied aspects of essential high entropy alloy based nanostructures. Consequently, various notable nanoparticles and combinations of high entropy alloys with carbon nanoparticles (graphene, carbon nanotube) and inorganic nanoparticles have been surveyed. In this context, several nanocomposite designs have been reported using the efficient techniques like thermal shock, flame spray pyrolysis, plasma spark sintering, mechanical milling, alloying, electrochemical, and solution to name a few. The resulting high entropy alloy derived nanomaterials have been researched for microstructure, nanocrystalline structure, different mechanical features (microhardness, modulus, stress–strain, compression properties), wear, electrochemical, thermal, and range of other physical properties. Consequently, research on high entropy alloy nanostructures has pointed towards the applied fields of energy storage (batteries and supercapacitors), radiation shielding, corrosion/wear coatings, and biomedical uses.

In this article, a series of considerably fast response visible light photodetectors-based CdS nanostructure were fabricated via pulsed laser deposition (PLD) technique. Further, a detailed relation between the utilized laser energy during the nanostructured CdS deposition along with the photo-responsive characteristics of the projected devices was established. Particularly, higher laser energy resulted in augmented figure of merit wherein the photo-responsivity (R) increased from 32 to 54.8 mA/W upon increasing the applied laser energy from 140 to 220 mJ, respectively. The linear dynamic range (LDR) of the fabricated devices exhibited a pronounced laser energy linear dependency with maximum value of 20 dB at 220 mJ. In contrast, the optical power profile revealed an inverse correlation with the attained R, descending values from 68.5 mA/W at 6 mW/cm2 to 34.7 mA/W at 26 mW/cm2. Of the fabricated devices, photodetector attained using laser energy of 220 mJ resulted in response/recovery time of 179 and 161 ms, respectively. Despite the consistency and robustness of the proposed geometry, it represents a rapid framework for eco-friendly optoelectronic design.

The presence of Methyl Orange, a hazardous organic compound typically found in industrial wastewater, presents a significant environmental challenge, necessitating the development of effective strategies for its removal to mitigate adverse impacts on aquatic ecosystems and human health. In this work, we utilized 60-watt continuous-wave (CW) and high-power CO2 laser with 10.6 μm wavelength to synthesize Zinc Oxide nanoparticles (ZnO NPs) doped with 1% Cerium (Ce) as photocatalyst at standard laboratory conditions through Laser-Assisted Chemical Bath Synthesis (LACBS) technique. The synthesized nanostructures were thoroughly characterized using UV–vis spectroscopy, field-emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD) techniques. Subsequently, their efficiency in degrading Methyl Orange (MO) dye was evaluated under UV and sunlight irradiation. The findings revealed that the 1% Ce-doped ZnO sample exhibited enhanced photocatalytic efficiency under both UV and sunlight irradiation, as well as active adsorption capabilities in the absence of light. Notably, the most effective photodegradation performance was achieved under solar radiation, with an impressive 95% of MO dye degradation observed after just 90 min of exposure.