Scalable production of high-quality MoS 2 nanosheets remains challenging for industrial applications and research in basic sciences. N-methyl-2pyrrolidine (NMP) is a commonly used solvent for exfoliation of MoS 2 nanosheets having further disadvantage of slow volatility rate. The present study demonstrates a cost-effective facile chemical route to synthesize few-layer MoS 2 nanosheets using acetone as a solvent and by varying bulk initial concentration of samples to scale up the production in large scale to fulfill the demand for potential applications. In our study, we aim to obtain stable growth of high quality few layer MoS 2 nanosheets by long sonication times. Optical absorption spectra, Raman spectra, size of nanosheets and layer thickness of as-grown MoS 2 nanosheets were found to be matching with those obtained from other synthesis methods. Effective photocatalytic performance of MoS 2 nanosheets without being consumed as a reactant was experimented by decomposing Methylene Blue dye in aqueous solution under irradiation of visible light. This study provides an idea to synthesize low-cost, sustainable and efficient photocatalytic material in large scale for the next generation to control water pollution quite efficiently by protecting the environment from the contamination coming from these dyes.

We present measurements of current noise and cross-correlations in three-terminal Superconductor-Normal metal-Superconductor (S-N-S) nanostructures that are potential solid-state entanglers thanks to Andreev reflections at the N-S interfaces. The noise correlation measurements spanned from the regime where electron-electron interactions are relevant to the regime of Incoherent Multiple Andreev Reflection (IMAR). In the latter regime, negative cross-correlations are observed in samples with closely-spaced junctions.

Two-dimensional (2D) group-VI transition metal dichalcogenide (TMD) semiconductors, such as MoS2, MoSe2, WS2 and others manifest strong light matter coupling and exhibit direct band gaps which lie in the visible and infrared spectral regimes.

Nanostructures of layered 2D materials have been proven one of the significant recent trends for visible-light-driven photocatalysis because of their unique morphology, effective optical adsorption, and rich active sites. Herein, we synthesized ultrathin-layered MoS2 nanoflowers and nanosheets with rich active sites by using a facile hydrothermal technique. The photocatalytic performance of the as-synthesized MoS2 nanoflowers (NF) and nanosheets (NS) were investigated for the photodegradation of MB (methylene blue), MG (malachite Green), and RhB (rhodamine B) dye under visible light irradiations. Ultrathin-layered nanoflowers showed faster degradation (96% in 150 min) in RhB under visible light irradiation, probably due to a large number of active sites and high available surface area. The kinetic study demonstrated that the first-order kinetic model best explained the process of photodegradation. The MoS2 nanoflowers catalysts has similar catalytic performance after four consecutive cyclic performances, demonstrating their good stability. The results showed that the MoS2 nanoflowers have outstanding visible-light-driven photocatalytic activity and could be an effective catalyst for industrial wastewater treatment.

To improve the production rate of MoS 2 nanosheets as an excellent supercapacitor (SC) material and enhance the performance of the MoS 2 -based solid-state SC, a liquid phase exfoliation method is used to prepare MoS 2 nanosheets on a large scale. Then, the MnO 2 nanowire sample is synthesized by a one-step hydrothermal method to make a composite with the as-synthesized MoS 2 nanosheets to achieve a better performance of the solid-state SC. The interaction between the MoS 2 nanosheets and MnO 2 nanowires produces a synergistic effect, resulting in a decent energy storage performance. For practical applications, all-solid-state SC devices are fabricated with different molar ratios of MoS 2 nanosheets and MnO 2 nanowires. From the experimental results, it can be seen that the synthesized nanocomposite with a 1:4 M ratio of MoS 2 nanosheets and MnO 2 nanowires exhibits a high Brunauer–Emmett–Teller surface area (∼118 m 2 /g), optimum pore size distribution, a specific capacitance value of 212 F/g at 0.8 A/g, an energy density of 29.5 W h/kg, and a power density of 1316 W/kg. Besides, cyclic charging–discharging and retention tests manifest significant cycling stability with 84.1% capacitive retention after completing 5000 rapid charge–discharge cycles. It is believed that this unique, symmetric, lightweight, solid-state SC device may help accomplish a scalable approach toward powering forthcoming portable energy storage applications.

The resistive and reactive parts of the magnetoimpedance of sintered ferromagnetic samples of La0.7Sr0.3−xAgxMnO3 (x=0.05,0.25) have been measured at room temperature (<Tc) over a frequency interval from 1kHzto15MHz and in the presence of magnetic field up to 4kOe. The field dependence of relative change in resistance [ΔR∕R(0)] is small in the kilohertz region but increases strongly for higher frequency of excitation. The maximum value of [ΔR∕R(0)] at H=4kOe and for ω=15MHz is around 70%. On the contrary the corresponding change in reactance [ΔX∕X(0)] has less frequency sensitivity, and the maximum occurs at ω≈1MHz. The magnetoimpedance is negative for all frequencies. The normalized magnetoimpedance δZ as defined by [Z(H)−Z(0)]∕[Z(0)−Z(4kOe)] when plotted against scaled field H∕H1∕2 is found to be frequency independent; H1∕2 is the field where δZ is reduced to half its maximum. A phenomenological formula for magnetoimpedance, Z(H), in a ferromagnetic material, is proposed based on the Padé approximant. The formula for Z(H) predicts the scaled behavior of δZ.

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One of the main objectives in wastewater treatment and sustainable energy production is to find photocatalysts that are favorably efficient and cost-effective. Transition-metal dichalcogenides (TMDs) are promising photocatalytic materials; out of all, MoS2 is extensively studied as a cocatalyst in the TMD library due to its exceptional photocatalytic activity for the degradation of organic dyes due to its distinctive morphology, adequate optical absorption, and rich active sites. However, sulfur ions on the active edges facilitate the catalytic activity of MoS2. On the basal planes, sulfur ions are catalytically inactive. Injecting metal atoms into the MoS2 lattice is a handy approach for triggering the surface of the basal planes and enriching catalytically active sites. Effective band gap engineering, sulfur edges, and improved optical absorption of Mn-doped MoS2 nanostructures are promising for improving their charge separation and photostimulated dye degradation activity. The percentage of dye degradation of MB under visible-light irradiations was found to be 89.87 and 100% for pristine and 20% Mn-doped MoS2 in 150 and 90 min, respectively. However, the degradation of MB dye was increased when the doping concentration in MoS2 increased from 5 to 20%. The kinetic study showed that the first-order kinetic model described the photodegradation mechanism well. After four cycles, the 20% Mn-doped MoS2 catalysts maintained comparable catalytic efficacy, indicating its excellent stability. The results demonstrated that the Mn-doped MoS2 nanostructures exhibit exceptional visible-light-driven photocatalytic activity and could perform well as a catalyst for industrial wastewater treatment.