A5101942706- Ion-surface interactions and analysis
- ZnO doping and properties
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Electronic and Structural Properties of Oxides
- Transition Metal Oxide Nanomaterials
- Ga2O3 and related materials
- TiO2 Photocatalysis and Solar Cells
- Copper Interconnects and Reliability
- Magnetic properties of thin films
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Magnetic Properties and Synthesis of Ferrites
- Magnetic and transport properties of perovskites and related materials
- Nuclear materials and radiation effects
- Theoretical and Computational Physics
- Integrated Circuits and Semiconductor Failure Analysis
- Diamond and Carbon-based Materials Research
- Advanced Photocatalysis Techniques
- Catalytic Processes in Materials Science
- Multiferroics and related materials
- Iron oxide chemistry and applications
Siksha O Anusandhan University
2024
Netaji Subhash Chandra Bose Medical College
2024
Utkal University
2011-2023
Bhabha Atomic Research Centre
1991-2020
Indian Institute of Technology Delhi
2019
Solapur University
2018
Inter-University Accelerator Centre
1999-2016
Institute of Physics, Bhubaneshwar
2008-2016
Maharaja Sriram Chandra Bhanja Deo University
2008
National Institute of Technology Rourkela
2008
In Mn1−xZnxFe2O4 (x=0 to 1) nanosize particles prepared through hydrothermal precipitation we observe a decrease in particle size from 13 4 nm with increasing Zn concentration 0 1. The lattice constant, a, for all Mn/Zn concentrations is found be less than that the corresponding bulk values. At specific compositions within x=0.35 and 0.5, temperature dependence of magnetization exhibits cusp-like behavior below at which nanoparticles undergo ferri- para-magnetic transition (Tc). Curie...
Nanosize TiO2 powders prepared by the sol–gel technique at pH of precipitation 4.5 and 6.5 show anatase phase after calcining 500 °C. Anatase to rutile transformation (ART), however, occurs 650 °C in case while 850 °C is found be ART temperature for lower sample. dependent has not been reported so far best our knowledge. It known that smaller particle size, temperature, vice versa. The observation higher crystallite size sample contradicts result. We realized from x-ray photoelectron...
Abstract Field‐effect transistor (FET) biosensors based on hybrid nanostructures present unique advantages of high sensitivity, small size, excellent dynamic range, and compatibility with integrated circuits. In this work, the fabrication highly sensitive selective MoS 2 /TiO nanostructure‐based FET is demonstrated for detection Gram‐positive bacteria. The fabricated are efficiently capable discriminating between Gram‐negative bacteria a limit 50 cfu mL −1 . biosensor exhibits sensitivity...
We present a brief review on the evolution of structure, microstructure, electrical and magnetic properties NiO with transition metal (TM) doping. The fcc structure is not affected TM doping whereas some ion influences microstructure. antiferromagnetic property strongly modified (Fe, Mn, V) same much other (Co, Cr, Zn Cu) Not only dopants but also form material decides order in host matrix. Powder exhibits room temperature ferromagnetism Fe doping, superparamagnetism Mn thin films hand...
Abstract TiO 2 and Co-doped (CTO) thin films deposited at various oxygen partial pressures by pulsed laser deposition exhibit room temperature ferromagnetism (RTFM) independent of their phase. Films 0.1 mTorr pressure show a complete rutile phase confirmed from glancing angle x-ray diffraction Raman spectroscopy. At the highest pressure, i.e. 300 mTorr, although film shows anatase phase, small peak corresponding to along with is identified in case CTO film. An increase O Ti/(Ti+Co) ratio...
Swift heavy ion (SHI) irradiation in thin films significantly modifies the structure and related properties a controlled manner. In present study, 120 MeV Ag on AgInSe2 nanoparticle prepared by thermal evaporation method induced modifications other are being discussed. The led to suppression of GIXRD Raman peaks with increasing fluence, which indicated amorphization along path ions. Poisson's fitting fluence dependence normalized area under peak gave radius track as 5.8 nm. Microstructural...
Nanosize particles (average size ∼12 nm) of mixed ferrite Mn0.65Zn0.35Fe2O4 were prepared by the hydrothermal precipitation route and studied using x-ray diffraction, transmission electron microscopy, differential scanning calorimetry, magnetization measurements, Mössbauer spectroscopy. The as-prepared sample was largely ferrimagnetic and, as annealed at temperatures above 250 °C, it gradually became superparamagnetic. This unexpected behavior is explained assuming that cation distribution...
Microstructure and magnetic properties of monodispersed pseudocubic trapezoidal particles with varying sizes prepared through the hydrothermal precipitation route are reported. The coercivity for was similar to that reported values. For particles, however, is unusually high (∼6 kOe) as compared maximum value (3 in literature. Detailed microstructural analysis revealed a well-defined shape are, fact, polycrystalline. its variation particle size correlated internal nanostructure particles.
Sensitivity of the anatase and rutile phases titanium dioxide to Swift Heavy Ion (SHI) irradiation was experimentally probed compared with predictions Coulomb explosion, analytical inelastic thermal spike models ion-matter interaction. Conforming all these models, our study indicated higher sensitivity ions than phase. A detailed examination however revealed that explosion model cannot explain either nature variation interaction cross section SHI energy deposited by ions, Se target...