A5086066763- Crystallization and Solubility Studies
- Ferroelectric and Piezoelectric Materials
- X-ray Diffraction in Crystallography
- Luminescence Properties of Advanced Materials
- Chalcogenide Semiconductor Thin Films
- Acoustic Wave Resonator Technologies
- Microwave Dielectric Ceramics Synthesis
- Photorefractive and Nonlinear Optics
- Radiation Detection and Scintillator Technologies
- Advanced Thermoelectric Materials and Devices
- Heusler alloys: electronic and magnetic properties
- Crystallography and molecular interactions
- Thermography and Photoacoustic Techniques
- Spectroscopy and Quantum Chemical Studies
- Glass properties and applications
- Postharvest Quality and Shelf Life Management
- Semiconductor materials and interfaces
- Plant Physiology and Cultivation Studies
- Gas Sensing Nanomaterials and Sensors
- Plant Gene Expression Analysis
- Thin-Film Transistor Technologies
- Transition Metal Oxide Nanomaterials
- Electromagnetic wave absorption materials
- Thermal Radiation and Cooling Technologies
- Advanced Antenna and Metasurface Technologies
Pennsylvania State University
2023-2024
University of Delhi
1996-2023
Pandit Ravishankar Shukla University
1988-2020
Central Scientific Instruments Organisation
2005
Abstract Highly effective electromagnetic (EM) wave absorber materials with strong reflection loss (RL) and a wide absorption bandwidth (EBW) in gigahertz (GHz) frequencies are crucial for advanced wireless applications portable electronics. Traditional microwave absorbers lack magnetic struggle impedance matching, while ferrites stable, exhibit excellent dielectric losses, offer better matching. However, achieving the desired EBW remains challenge, necessitating further composition design....
A series of single phase white light emitting CaSrAl2SiO7:Dy3+ phosphors were prepared by traditional high temperature solid state reaction method. Structural characterization was done X-ray diffraction, field emission scanning electron microscopy and energy dispersive spectroscopy analyses. Optical performed from photoluminescence thermoluminescence studies. When excited at 350 nm, showed two intense bands in the blue region (480 nm 493 nm) corresponding to 4F9/2 → 6H15/2 transition one...
Thermoelectric (TE) materials have made rapid advancement in the past decade, paving pathway toward design of solid-state waste heat recovery systems. The next requirement process is realization full-scale multistage TE devices medium to high temperature range for enhanced power generation. Here, we report and manufacturing skutterudite (SKD)/half-Heusler (hH) cascaded with 49-couple legs each stage. automated pick-and-place tool employed module fabrication providing overall efficiency...
Methylglyoxal (MG), a toxic compound produced as by-product of several cellular processes, such respiration and photosynthesis, is well known for its deleterious effects, mainly through glycation proteins during plant stress responses. However, very little about impact on fruit ripening. Here, we found that MG levels are maintained at high in green tomato (Solanum lycopersicum L.) fruits decline ripening despite respiratory burst this transition. We demonstrate mediated glutathione-dependent...
The demand for high‐performance materials in thermoelectric (TE) technology has driven continuous efforts to enhance the performance of commercialized Bi 2 Te 3 ‐based materials. Here, we report success achieving significant improvements n‐type 2.8 Se 0.2 S 0.01 through implementation a hot extrusion manufacturing process. This tailored process yielded desired microstructure characterized by grain growth and preferred orientations. resulting enlarged grain‐based exhibits reduced dislocations...
Two‐wave mixing is a remarkable area of research in the field non‐linear optics, finding various applications development opto‐electronic devices, photorefractive waveguides, real time holography, etc. Non‐linear optical properties ferroelectric potassium sodium niobate (KNN) thin films have been interrogated using two‐wave phenomenon. Regarding this, ‐axis oriented K 0.35 Na (1‐0.35) NbO 3 were successfully grown on epitaxial matched (100) SrTiO substrate pulsed laser deposition (PLD)...
A relative photosensitivity factor S equal to 1430 is observed due incorporation of Y in CdS. Dye-treatment enhances this value 4516. charge-transfer mechanism may be considered responsible for process. Superliner photoconductivity and thermal quenching the temperature range 133-366 K are explained terms a two-centre model.
Photoconductive CdS:Y films prepared by chemical bath technique show photocurrent to dark current ratios of the order 105. From scanning electron micrographs, a combination crystalline and noncrystalline growths are inferred. In presence Y maximum transmission 60% is found. Traps at depths 0.68 0.72 eV found effective.
Photoconductive CdS:La films have been prepared by a chemical bath deposition technique. Photocurrent to dark current ratios of the order 105 are observed. Growth conditions discussed as function time and concentrations flux impurity La. Trap depths 0.59-0.72 eV found be effective.
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Exploring low-grade waste heat energy harvesting is crucial to address increasing environmental concerns. Thermomagnetic materials are magnetic phase change that enable from low-temperature gradients. To achieve a high thermomagnetic conversion efficiency, there three main material requirements: (i) transition near room temperature, (ii) substantial in magnetization with and (iii) thermal conductivity. Here, we demonstrate high-performance Gd5Si2.4Ge1.6 alloy meets these requirements. The...