WO Nanofibers Functionalized with Graphene as a Selective Sensing of NO Gas at Room Temperature.

Recent trends in two-dimensional (2D) graphene have demonstrated significant potential for gas-sensing applications with significantly enhanced sensitivity even at room temperature. Herein, this study presents fabrication of distinctive gas sensor based on one-dimensional (1D) WO nanofibers decorated 2D graphene, specifically coated on copper (Cu)-based interdigitated electrodes formed by DC sputtering, which can selectively detect NO gas at room temperature. The sensor device fabricated using WO/Gr1.

Advancements in lanthanide-based perovskite oxide semiconductors for gas sensing applications: a focus on doping effects and development.

Lanthanide-based perovskite oxide semiconductors have garnered significant attention due to their exceptional electrical and sensing properties, making them promising candidates for gas sensing applications. This review paper focuses on developments and the impact of doping in lanthanide-based perovskite oxide semiconductors for gas sensing purposes. The review explores the factors influencing gas sensing performance, such as operating temperature, dopant selection, and target gas species.

Correction: Transition metal oxides as a cathode for indispensable Na-ion batteries.

[This corrects the article DOI: 10.1039/D2RA03601K.].

Defect-Induced Self-Poling in a WO/PVDF Piezoelectric Energy Harvester.

WO nanostructures, previously used for electrocatalysis, energy storage, electrochromic, and gas sensing applications, are incorporated in poly(vinylidene fluoride) (PVDF) in this work for mechanical energy-harvesting applications. X-ray diffraction spectroscopy (XRD), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, differential scanning calorimetry (DSC), and the polarization-electric (P-E) field loop test prompts the addition of WO nanorods in PVDF nucleates and stabilizes the piezoelectric polar γ-phase in the nanocomposite. Electrochemical experiments were employed for the first time to relate the event of the evolution of crystalline phases in PVDF to the transfer of electrons to the electrolyte from PVDF using the data from cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).

Transition metal oxides as a cathode for indispensable Na-ion batteries.

The essential requirement to harness well-known renewable energy sources like wind energy, solar energy, . as a component of an overall plan to guarantee global power sustainability will require highly efficient, high power and energy density batteries to collect the derived electrical power and balance out variations in both supply and demand. Owing to the continuous exhaustion of fossil fuels, and ever increasing ecological problems associated with global warming, there is a critical requirement for searching for an alternative energy storage technology for a better and sustainable future.

Discharge State of Layered P2-Type Cathode Reveals Unsafe than Charge Condition in Thermal Runaway Event for Sodium-Ion Batteries.

A sol-gel process followed by heat treatment derived a layered P2-type NaCoO cathode, which depicted unit cell parameters values of = 2.8389 Å, = 10.9899 Å, and = 76.

Synthesis, characterization and application of intracellular Ag/AgCl nanohybrids biosynthesized in Scenedesmus sp. as neutral lipid inducer and antibacterial agent.

The current research focuses on the Intracellular biosynthesis of Ag/AgCl nanohybrids in microalgae, Scenedesmus sp. The effect of biosynthesis process on growth and lipid profile of cells is key element of this study. Ag/AgCl nanohybrids synthesized intracellularly were characterized by UV-Vis spectrophotometer, Powder X-Ray Diffraction (P-XRD), Scanning Electron Microscopy (SEM), High Resolution Transmission Electron Microscopy (HRTEM).

Defect Mediated WO Nanorods Bundle for Nonenzymatic Amperometric Glucose Sensing Application.

In this work, we have successfully proclaimed the importance of defect prone nanostructure on to the electrode surface for the promising glucose sensing applications. Oxygen-deficient WO moieties with multiple valences W and W have been investigated as an efficient electrocatalyst for the nonenzymatic glucose sensing. In order to highlight the importance of the defect, WO nanomaterial's electrode has also been synthesized and tested for glucose sensing.

Transformation of Battery to High Performance Pseudocapacitor by the Hybridization of WO with RuO Nanostructures.

Defects such as oxygen vacancy in the nanostructures have paramount importance in tuning the optical and electronic properties of a metal oxide. Here we report the growth of oxygen deficit tungsten oxide (WO) nanorods modified with ruthenium oxide (RuO) using a simple and economical hydrothermal approach for energy storage application. In this work, a novel approach of hybridizing the WO nanostructure with RuO to control the electrochemical performance for energy storage applications has been proposed.

Influence of pressure on the transport, magnetic, and structural properties of superconducting CrNbSe single crystal.

We investigate the superconducting critical current density ( ), transition temperature ( ), and flux pinning properties under hydrostatic pressure () for CrNbSe single crystal. The application of enhances in both electrical resistivity (∼0.38 K GPa: 0 ≤ ≤ 2.

Gold nanoparticle-cellulose/PDMS nanocomposite: a flexible dielectric material for harvesting mechanical energy.

Cellulose is an abundant natural piezoelectric polymer and is also a renewable resource of significant importance. Here in this work we realize an enhanced piezoelectric response with cellulose in a polydimethylsiloxane (PDMS) matrix by forming a nanocomposite with the incorporation of gold nanoparticles (Au NPs). In the Au NP-cellulose/PDMS nanocomposite an enhancement in the dielectric constant is recorded due to the presence of cellulose alone and a reduction of dielectric loss is found owing to the presence of Au NPs.

Screening of microalgae for biosynthesis and optimization of Ag/AgCl nano hybrids having antibacterial effect.

Here we report a facile and novel bio-synthesis technique, using algal extract to reduce silver metal ions into Ag/AgCl nanoparticles. Different concentrations of metallic precursors of silver nitrate (0.1 mM, 0.

Enhancement of superconducting properties and flux pinning mechanism on CrNbSe single crystal under Hydrostatic pressure.

Superconducting properties of CrNbSe (T~6.64 K) single crystals have been investigated through the temperature dependent resistivity (~8 GPa) and DC magnetization (~1 GPa) measurements. Further, the critical current density (J) as a function of applied magnetic field has been studied from magnetic isotherms.

A quarter of a century after its synthesis and with >200 papers based on its use, `Co(CO)(OH)·0.11HO' proves to be Co(CO)(OH)·HO from synchrotron powder diffraction data.

The successful attempt to solve the crystal structure of Co(CO)(OH)·0.11HO (denoted CCH), based on synchrotron powder diffraction data, leads to a drastic revision of the chemical formula to Co(CO)(OH)·HO [hexacobalt(II) bis(carbonate) octahydroxide monohydrate] and to a hexagonal cell instead of the orthorhombic cell suggested previously [Porta et al. (1992).

Pseudocapacitive-battery-like behavior of cobalt manganese nickel sulfide (CoMnNiS) nanosheets grown on Ni-foam by electrodeposition for realizing high capacity.

Hierarchical interconnected nanosheets (HIN) of cobalt manganese nickel sulfide (CoMnNiS) were synthesized on Ni foam by a simple and economical electrodeposition technique for energy storage application. Sulfonated thin nanosheets of Co, Mn and Ni provide stability of chemical activity, surface functionalization and surface reactivity to the electrode. The fabricated electrode shows a specific capacity of 257.

Effect of Cu intercalation on humidity sensing properties of BiSe topological insulator single crystals.

Here we report the self-flux method-based synthesis of CuxBi2Se3 (x = 0, 0.13 and 0.25) topological insulator (TI) single crystals with high phase purity for humidity sensing for the first time.

Enhancement of field electron emission in topological insulator BiSe by Ni doping.

Nanostructures of bismuth selenide (Bi2Se3), a 3D topological insulator material, and nickel (Ni) doped Bi2Se3 samples were prepared by a hydrothermal method to explore the field emission properties. An enrichment in the field electron emission (FE) properties in terms of the threshold and turn-on field values of Bi2Se3 and Ni doped Bi2Se3 nanostructures was measured at a base pressure of ∼1 × 10-8 mbar. Using the background of the Fowler-Nordheim (FN) theory a field enhancement factor (β) of 5.

Spitzer shaped ZnO nanostructures for enhancement of field electron emission behaviors.

We observed enhanced field emission (FE) behavior for spitzer shaped ZnO nanowires synthesized a hydrothermal approach. The spitzer shaped and pointed tipped 1D ZnO nanowires of average diameter 120 nm and length ∼5-6 μm were randomly grown over an ITO coated glass substrate. The turn-on field ( ) of 1.

Pressure assisted enhancement in superconducting properties of Fe substituted NbSe2 single crystal.

The impact of hydrostatic pressure (P) up to 1 GPa on T , J and the nature of the pinning mechanism in FeNbSe single crystals have been investigated within the framework of the collective theory. We found that the pressure can induce a transition from the regime where pinning is controlled by spatial variation in the critical transition temperature (δT ) to the regime controlled by spatial variation in the mean free path (δℓ). Furthermore, T and low field J are slightly induced, although the J drops more rapidly at high fields than at ambient P.

Mesoporous layered hexagonal platelets of CoO nanoparticles with (111) facets for battery applications: high performance and ultra-high rate capability.

The thermally stable and crystalline 2D layered mesoporous hexagonal platelets of cobalt oxide (CoO) with (111) facets were prepared by using the template-free wet chemical synthesis approach. The high surface energy (111) facets known for a highly electroactive surface are expected to enhance the electrochemical properties, especially the rate capability. The highly crystalline CoO with an average particle size of 25 nm formed a 2D mesoporous layered structure, with an average thickness of ∼40 nm, a pore size of 8-10 nm, and a specific surface area of 45.

Enhancement of superconducting critical current density by Fe impurity substitution in NbSe single crystals and the vortex pinning mechanism.

Magnetization measurements have been used to determine the effect of magnetic impurities (Fe) on the Larkin-Ovchinnikov (LO) 3D collective pinning model in NbSe single crystals. Upon increasing the concentration of Fe impurities, the superconducting critical current density enhances appreciably compared to pure NbSe reflecting the fact that the addition of magnetic impurities assists in improving the practical applicability of NbSe. The random pinning potential that is introduced by the Fe impurities also shows a considerable change in the interaction between the vortices and the core region, resulting in a competitive nature of single vortex, small bundle and large bundle pinning regimes in the H-T phase diagram.

Search for Origin of Room Temperature Ferromagnetism Properties in Ni-Doped ZnO Nanostructure.

The origin of room temperature (RT) ferromagnetism (FM) in ZnNiO (0< x < 0.125) samples are systematically investigated through physical, optical, and magnetic properties of nanostructure, prepared by simple low-temperature wet chemical method. Reitveld refinement of X-ray diffraction pattern displays an increase in lattice parameters with strain relaxation and contraction in Zn/O occupancy ratio by means of Ni-doping.

Synthesis, Morphology, Optical and Electrical Properties of Cu(1−x) Fe(x) O Nanopowder.

The pure and Fe-doped CuO nanoparticles of the series Cu(1−x) Fe(x)O (x = 0, 0.027, 0.055, 0.

Two-Dimensional Mesoporous Carbon Electrode for High Energy Density Electrochemical Supercapacitors.

Mesoporous carbon (MPC) with highly textured, reproducible and uniform structure is prepared by silica-sol template assisted method, as new carbonaceous supercapacitor materials with high energy density. High resolution transmission electron microscopy studies revealed that the MPC consisted of textured structure of carbon on the sheets like domains and exhibited a specific surface area of 1412 m2 g-1. The symmetric supercapacitor of MPC exhibits an excellent cyclability over 5000 cycles and high energy density of 84.