A5041368152- 2D Materials and Applications
- Advanced ceramic materials synthesis
- Advanced materials and composites
- Graphene research and applications
- MXene and MAX Phase Materials
- Perovskite Materials and Applications
- Metal and Thin Film Mechanics
- Physics of Superconductivity and Magnetism
- Aluminum Alloys Composites Properties
- Chalcogenide Semiconductor Thin Films
- Diamond and Carbon-based Materials Research
- Nanopore and Nanochannel Transport Studies
- Plasmonic and Surface Plasmon Research
- Thermal properties of materials
- Semiconductor materials and devices
- Quantum Dots Synthesis And Properties
- Magnetic and transport properties of perovskites and related materials
- Superconductivity in MgB2 and Alloys
- Superconducting Materials and Applications
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Transition Metal Oxide Nanomaterials
- Advanced Thermoelectric Materials and Devices
- Silicon Carbide Semiconductor Technologies
- Iron-based superconductors research
Jain University
2022-2025
Indian Institute of Technology Madras
2018-2025
Ulsan National Institute of Science and Technology
2015-2019
National Cheng Kung University
2010-2017
Government of the Republic of Korea
2017
National Tsing Hua University
2013-2016
Tsinghua University
2014-2015
Berhampur University
2012-2014
Materials Science & Engineering
2014
Goa University
2012-2013
Interlayer excitons were observed at the heterojunctions in van der Waals heterostructures (vdW HSs). However, it is not known how excitonic phenomena are affected by stacking order. Here, we report twist-angle-dependent interlayer MoSe2/WSe2 vdW HSs based on photoluminescence (PL) and vdW-corrected density functional theory calculations. The PL intensity of depends primarily twist angle: It enhanced coherently stacked angles 0° 60° (owing to strong coupling) but disappears incoherent...
Transition metal dichalcogenides (TMDs) have recently received increasing attention because of their potential applications in semiconducting and optoelectronic devices exhibiting large optical absorptions the visible range. However, some studies reported that grain boundaries TMDs can be easily degraded by presence oxygen water UV irradiation, ozone, heating under ambient conditions. We herein demonstrate photodegradation WSe2 MoSe2 laser exposure (532 nm) subsequent prevention this...
Vertically stacked atomic layers from different layered crystals can be held together by van der Waals forces, which used for building novel heterostructures, offering a platform developing new generation of atomically thin, transparent and flexible devices. The performance these devices is critically dependent on the layer thickness interlayer electronic coupling, influencing hybridisation states as well charge energy transfer between layers. coupling affected relative orientation...
Robust room temperature valley polarization in monolayer and bilayer WS<sub>2</sub> using excitation slightly smaller than the ground state energy.
Abstract Light-emitting diodes (LEDs) are an indispensable part of our daily life. After being studied for a few decades, this field still has some room improvement. In regard, perovskite materials may take the leading role. recent years, LEDs have become most explored topic, owing to their various applications in photodetectors, solar cells, lasers, and so on. Noticeably, they exhibit significant characteristics developing LEDs. The luminous efficiency can be significantly enhanced by...
Herein, MoS2 quantum dots (QDs) with controlled optical, structural, and electronic properties are synthesized using the femtosecond pulsed laser ablation in liquid (fs-PLAL) technique by varying pulse width, power, time to harness potential for next-generation optoelectronics technology. Furthermore, this work elucidates key aspects of mechanisms underlying near-UV blue emissions accompanying large Stokes shift, consequent change sample color exposure parameters pertaining QDs. Through...
Optical conductivity, which originates from the interband transition due to electron–phonon interaction, is one of powerful tools used for studying electronic states in layered metal dichalcogenides (TMDCs). Here, we report first time optical conductivity WS2, emerging classes TMDCs, prepared directly on SiO2/Si substrate using reflection contrast spectroscopy. The measured at direct excitonic point K Brillouin zone monolayer WS2 shows a value 0.37 e2/πℏ visible range energy spectrum. Our...
Abstract Salinity gradient energy (SGE), known as blue is harvested from mixing seawater with river water in a controlled way using ion exchange membranes (IEMs). Using 2D materials IEMs improves the output power density few Wm −2 to thousands of over conventional membranes. In this review, we survey efforts taken employ different nanoporous or lamellar for SGE and provide comprehensive analysis fundamental principles behind SGE. Overall, review anticipated explain how can make viable source energy.
Abstract Discovery of two-dimensional (2D) topological insulators (TIs) demonstrates tremendous potential in the field thermoelectric since last decade. Here, we have synthesized 2D TI, Sb 2 Te 3 various thicknesses range 65–400 nm using mechanical exfoliation and studied temperature coefficient 100–300 K micro-Raman spectroscopy. The dependence peak position line width phonon modes been analyzed to determine coefficient, which is found be order 10 –2 cm −1 /K, it decreases with a decrease...
Mono-layer transition metal dichalcogenides (TMDCs) have emerged as an ideal platform for the study of many-body physics. As a result their low dimensionality, these materials show strong Coulomb interaction primarily due to reduced dielectric screening that leads formation stable excitons (bound electron-hole pairs) and higher order excitons, including trions, bi-excitons even at room temperature. van der Waals (vdW) heterostructures (HSs) TMDCs provide additional degree freedom altering...
A nanosized β-Si3N4-based powder doped with sintering additives of 6 wt% Al2O3 and 8 Y2O3 were sintered by spark plasma at different heating rates. The in situ shrinkage curves measured to identify the densification mechanism during rise temperature. At slower rates (50 100°C/min), grains are maintained after 1600°C for 5 min, while anisotropic grain growth is accelerated above 1500°C applying a rapid cycle (200°C/min). In addition dynamic Ostwald ripening that occur process, presence Morié...
Bioremediation in natural ecosystems is dependent upon the availability of micronutrients and cofactors, which iron one essential elements. Under aerobic alkaline conditions, oxidizes to Fe +3 creating deficiency. To acquire this growth-limiting nutrient, bacteria produce low-molecular-weight, high-affinity chelators termed siderophores. In study, siderophore-producing from rhizosphere nonrhizosphere areas coastal sand dunes were isolated using a culture-dependent approach assigned 8...
A conductive TiC nanopowder was incorporated into nanosized β‐Si 3 N 4 ‐based powder and consolidated by a spark plasma sintering (SPS) technique with rapid heating process. The influence of the phase on microstructure development Si matrix demonstrated. After sintering, transformed titanium oxycarbonitride. composite containing 5 wt% nano‐TiC x O y z shows larger average grain size aspect ratio than monolithic ceramic. This is possibly because leakage current hops across oxycarbonitride...