A5006137568- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Dielectric properties of ceramics
- Perovskite Materials and Applications
- Acoustic Wave Resonator Technologies
- Advanced Sensor and Energy Harvesting Materials
- Neuroscience and Neuropharmacology Research
- Electronic and Structural Properties of Oxides
- Pharmacological Effects of Natural Compounds
- Biochemical effects in animals
- GABA and Rice Research
- Dielectric materials and actuators
- Transition Metal Oxide Nanomaterials
- Tryptophan and brain disorders
- Sesquiterpenes and Asteraceae Studies
- Innovative Energy Harvesting Technologies
- Laser-Ablation Synthesis of Nanoparticles
- Chalcogenide Semiconductor Thin Films
- Bone Tissue Engineering Materials
- Industrial Gas Emission Control
- Advanced Battery Materials and Technologies
- Fungal Biology and Applications
- Ginger and Zingiberaceae research
- Phase-change materials and chalcogenides
- Pesticide Residue Analysis and Safety
Queen Mary University of London
2023-2025
Indian Institute of Science Bangalore
2024
Indian Institute of Technology Madras
2018-2023
Ramakrishna Mission Vivekananda Educational and Research Institute
2023
Leibniz Institute for Solid State and Materials Research
2021
Indian Institute of Information Technology Allahabad
2021
Jadavpur University
1992-2002
Photocatalytic reactive oxygen species (ROS) evolution with Bi5O7I still suffers from sluggish charge carrier dynamics and limited light absorption. Herein, abundant vacancies (OVs) were introduced into the microflower-like Bi5O7I, its ROS generation toward organic dye degradation under synergistic effect of visible ultrasound irradiation was investigated. Benefiting broadened visible-light absorption range, stronger piezoresponse, higher transport efficiency in OV-enriched (2-PEG-Bi5O7I),...
Abstract Reliable fabrication of large‐area perovskite films with antisolvent‐free printing techniques requires high‐volatility solvents, such as 2‐methoxyethanol (2ME), to formulate precursor inks. However, the high‐quality cesium–formamidinium (Cs–FA) perovskites has been hampered using volatile solvents due their poor coordination precursors. Here, this issue is resolved by re‐formulating a 2ME‐based Cs 0.05 FA 0.95 PbI 3 ink pre‐synthesized single crystals instead conventional mixture...
Lead-free, silicon compatible materials showing large electromechanical responses comparable to, or better than conventional relaxor ferroelectrics, are desirable for various nanoelectromechanical devices and applications. Defect-engineered electrostriction has recently been gaining popularity to obtain enhanced at sub 100 Hz frequencies. Here, we report record values of electrostrictive strain coefficients (M
Aligning dipoles in ferroelectric BaTiO 3 (BTO) nanoparticles enhances Li–S cathode performance by improving polysulfide adsorption.
Recently the solar energy, an inevitable part of green energy source, has become a mandatory topics in frontier research areas. In this respect, non-centrosymmetric ferroelectric perovskites with open circuit voltage (VOC) higher than bandgap, gain tremendous importance as next generation photovoltaic materials. Here non-toxic co-doped Ba1-x(Bi0.5Li0.5) x TiO3 system is designed where dopants influence band topology order to enhance effect. particular, at optimal doping concentration (x opt...
The bulk photovoltaic (PV) effect exhibited by non-centrosymmetric systems gained research interest due to the observed large open-circuit voltage. Ferroelectric exhibiting anomalous effects are mostly crystallized with multi-phase coexistence. Hence, computational difficulty in building a system restricts detailed studies through phenomenological and shift current theory. In this work, ferroelectric Ba1−x(Bi0.5K0.5)xTiO3 (BBKT) oxide is designed crystallize single-phase tetragonal symmetry...
The photovoltaic (PV) properties of polycrystalline Bi1−xLaxFeO3 (x = 0–0.3) films have been explored. X-ray diffraction study reveals that there is a gradual phase transition with the increase in La doping. composition x 0.25 found to be morphotropic boundary (MPB), beyond which system turns into non-/antipolar orthorhombic phase. polarization measurements reveal improved ferroelectric maximum remanent observed for film. A systematic on direct and indirect bandgaps has shown decreasing...
Polycrystalline BaTi1-xSnxO3 samples (x = 0.06, 0.07, 0.08, 0.09, 0.10, and 0.11) were synthesized by the solid state technique. The exhibit tetragonal phase at 300 K. In addition, x 0.09 also show orthorhombic with enhanced fractions upon poling. However, % an increase up to 0.07 a decrease in x. dielectric studies indicate that TC (cubic transition) shifts toward lower temperature where 0.10 0.11 maximum remnant polarization piezoelectric coefficient for 0.08. But bandgap sample shows...
Environment-friendly lead-free pyroelectrics are indispensable for pyroelectric generators to extract energy from low-gradient waste heat power portable electronic devices. The response near room temperature is essential high performance harvesters, which unfortunately limited ferroelectrics. Herein, BaTiO3-based ferroelectric–ZnO semiconductor composites were reported exhibit superior harvesting characteristics temperature. role of ZnO on the improved ferroelectric elucidated through...
BiFeO3 thin films have been widely studied for photoelectrochemical water splitting applications because of its narrow bandgap and good ferroelectricity which can promote the separation photo-generated charges. Bismuth is well known as a volatile element excess bismuth usually added into precursor to compensate loss during heat treatment, but amount required how will affect PEC performance not clearly studied. Herein, self-doped Bi1+x FeO3 are prepared via simple chemical solution deposition...
The recent renaissances in the field of ferroelectric oxides are owing to various photoinduced phenomena. However, microscopic correlations among physical characteristics essential for a detailed understanding dynamics associated with these In this work, dielectric, pyroelectric, and properties lead-free $\mathrm{B}{\mathrm{a}}_{0.875}{(\mathrm{B}{\mathrm{i}}_{0.5}\mathrm{L}{\mathrm{i}}_{0.5})}_{0.125}\mathrm{Ti}{\mathrm{O}}_{3}$ oxide carried out out-of-plane in-plane geometry. dielectric...
Ferroelectric oxides have gained research attention in the field of ferroelectric photovoltaics (PV) after discovery power conversion efficiency exceeding Shockley–Queisser limit BaTiO3 (BTO) crystals. However, advancement this is hindered by wide bandgap (>3 eV) nature oxides. In work, a novel lead-free (1 − x)BTO xBi(Ni2/3Nb1/3)O3 system was proposed and demonstrated to show reduction without compromising polarization. Notably, displayed from 3.1 2.4 eV upon varying composition x =...
Abstract Studies were carried out to evaluate the influence of methanol fraction Pluchea indica Less root extract (PIRE), dual inhibitors (BW 755C and phenidone) vitamin on both in vivo vitro free radical‐scavenging activities, CCl 4 ‐induced lipid peroxidation metabolism arachidonic acid by lipoxygenase. PIRE produced significant antiinflammatory activity against glucose oxidase‐induced paw oedema ( ), inhibited hydroxyl radical superoxide generation, lysis erythrocytes induced hydrogen...
Abstract Amitriptyline significantly inhibited alcohol, aspirin, indomethacin and cold‐restraint stress‐induced ulceration. Secretory studies conducted in pyloric‐ligated rats revealed that the drug, at doses employed, reduced total acidity protein content. However, significant reductions of gastric volume were only observed highest dose drug. In another set experiments, when 50% alcohol (v/v) was administered to pretreated with amitriptyline, it drug pH,
The compositionally induced ferroelectric to relaxor transformation via diffuse phase transition and structural disorder by external stimuli is explored in lead-free Ba
The daily use of allicin and whole germinated bengal gram seeds for 8 weeks led to a significant decrease in serum cholesterol levels normal volunteers with no side effects. standard reference, guggulipid therapy, significantly (p < 0.001) reduced the mean level 142.88 ± 24.14 mg/100 mL from an initial status 211.91 6.23 mg/100mL (32.36% 12.48% fall). Allicin treatment 129.99 2.79 pre-treatment value 148.10 8.81 mg/100mL, fall 13.36% 4.64%. was 135.62± 22.85 157.29 4.94 (17.15% 9.94% fall)...
Ferroelectric bismuth ferrite is an attractive candidate for switchable devices. The effect of dipole pinning due to the oxygen vacancy layer on switching behavior BiFeO3 thin film fabricated by chemical solution deposition method was studied after annealing under air, O2, and N2 environment. air annealed showed well defined dense grains leading a lower leakage current superior electrical properties compared other two films. photovoltage transient photocurrent measured positive negative...
An epitaxial lead free ferroelectric 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BZT-BCT) thin film is fabricated on a (001)Nb:SrTiO3 single crystalline substrate by the pulsed laser deposition method. The 2.3% lattice mismatch between BZT-BCT and suggests that grown under compressively strained state leaving large strain gradient near interface. Polarization versus electric field measurement reveals exhibits hysteresis character with imprint effect indicating existence of an internal field....
Calotropis procera has been widely used in the Indian traditional medicinal system for treatment of a variety disease conditions. Earlier studies our laboratory revealed that chloroform fraction C. root extract possesses significant analgesic, antipyretic and antiinflammatory activity. Further also that, unlike NSAIDs, simultaneously antiulcer It is well established NSAIDs are potentially ulcerogenic they exert their activity following inhibition prostaglandin synthesis (owing to blockade...
The enhanced electrocaloric (EC) effect in solid-state-based lead-free ferroelectric Ba0.875(Bi0.5Li0.5)0.125TiO3 system is investigated under light as an external stimulus. sample exhibits analogous value of maximum change entropy at Curie temperature, extracted from the two different measurements process. Notably, depicts adiabatic temperature (ΔT) 1.27 K and isothermal (ΔS) 2.05 J/K kg along with EC coefficient 0.426 mm/kV, dark conditions. In addition, > 0.5 over a broad range (~ 35 K)....
Ferroelectric systems with multi-phase co-existence are found to exhibit anomalous photovoltaic response. In this work, detailed studies carried out under 405 nm light illumination on Ba
Abstract Environment-friendly solid-state cooling technology necessitates the search for energy-efficient electrocaloric (EC) materials. In this regard, EC effect and energy storage performance have been investigated on a site-engineered lead-free Ba 1- x (Bi 0.5 Li ) TiO 3 ( = 0.0, 0.10, 0.125, 0.15 0.175) system from perspective of its enhanced characteristic parameters. The ferroelectric dielectric studies reveal tunable polarization Curie temperature as function composition. measurements...