A5066294304- Electromagnetic wave absorption materials
- Conducting polymers and applications
- Dielectric materials and actuators
- Analytical Chemistry and Sensors
- Advanced Antenna and Metasurface Technologies
- Nanopore and Nanochannel Transport Studies
- Gas Sensing Nanomaterials and Sensors
- Ion-surface interactions and analysis
- Advanced Battery Materials and Technologies
- Polymer Nanocomposite Synthesis and Irradiation
- Fuel Cells and Related Materials
- Material Dynamics and Properties
- Ionic liquids properties and applications
- Theoretical and Computational Physics
- Electrochemical Analysis and Applications
- Membrane-based Ion Separation Techniques
- Advanced biosensing and bioanalysis techniques
- Advanced Memory and Neural Computing
- Advanced Energy Technologies and Civil Engineering Innovations
- Electrostatics and Colloid Interactions
- Polymer Nanocomposites and Properties
- Advanced Scientific and Engineering Studies
- Semiconductor materials and devices
- Semiconductor materials and interfaces
- Advanced Thermodynamics and Statistical Mechanics
University of Delhi
2014-2024
Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute
2008
Panjab University
2001-2006
Max Planck Institute for Solid State Research
1999
Banaras Hindu University
1994-1995
The present paper reports the complex permittivity, permeability, and microwave absorption properties of core shell type poly (3,4-ethylenedioxy thiophene) (PEDOT) nanocomposite with barium ferrite, synthesized by in situ emulsion polymerization, 12.4−18 GHz frequency range. High-resolution transmission electron microscopy (HRTEM) studies reveal formation core−shell morphology ferrite particles (60−80 nm) as center while polymer formulates outer composite. presence nanoparticles matrix...
High performance γ-Fe<sub>2</sub>O<sub>3</sub>decorated rGO–polyaniline core–shell tubes demonstrated exceptional EMI shielding which could be an ultimate choice for future building block material in SE applications.
This paper deals with the preparation of graphene oxide-ferrofluid-cement nanocomposites to evaluate electromagnetic interference (EMI) shielding effectiveness (SE) in 8.2-12.4 GHz frequency range. It has been observed that incorporation oxide (30 wt%) along an appropriate amount ferrofluid cement matrix leads a 46 dB (>99% attenuation).The presence and strong polarizations magnetic losses consequently result higher compared pristine cement. The resulting have shown Shore hardness 54 dc...
Conducting polymer nanocomposites of polyphenyl amine with barium ferrite nanoparticles (50–70nm) have been synthesized via emulsion polymerization. The complex permittivity, permeability, and microwave absorption properties the composite were studied in 12.4–18GHz (Ku band) frequency range. has shown high shielding effectiveness due to (SEA) 28.9dB (∼99.9%), which strongly depends on dielectric loss, magnetic volume fraction nanoparticles. value SEA suggests that these composites can be...
Polymer nanocomposites consisting of poly(vinylidenefluoride-co-hexafluoropropylene) PVdF-HFP, inorganic salt (LiBF4), organic (EMIMBF4), multiwalled carbon nanotubes (MWCNTs), and Fe3O4 nanoparticles were prepared as electromagnetic shield material. Improvement in conductivity dielectric property due to the introduction EMIMBF4, LiBF4, MWCNTs was confirmed by complex impedance spectroscopy. The highest obtained is ∼1.86 mS/cm. This attributed high ionic liquids formation a connecting...
β–Naphthalene sulphonic acid (β–NSA) doped polyaniline (PANI)–flyash (FA) composites have been prepared by chemical oxidative polymerization route whose conductivity lies in the range 2.37–21.49 S/cm. The temperature dependence of electrical has also recorded which shows that follow Mott's 3D–VRH model. SEM images demonstrate β–NSA leads to formation tubular structure with incorporated flyash phase. TGA studies show improvement thermal stability increase loading level flyash. Complex...
Nanocomposites of polyaniline with barium ferrite and titanium dioxide (TiO2) are synthesized via in situ emulsion polymerization. The transmission electron microscopy (TEM) high resolution TEM result shows the formation array nanoparticles encapsulated within polymer chains during synthesis process. value microwave absorption, 58dB (&gt;99.999% attenuation) results from combined effect matrix. amount has profound on permittivity (ε), permeability (μ), absorption nanocomposite....
The current/voltage characteristics of mixed (ion+electron) conductor-based ‘TEMPOS’ (Tunable Electronic Material with Pores in Oxide on Silicon) structures are reported. TEMPOS novel electronic MOS-like having etched swift heavy ion tracks (i.e., nanopores) the dielectric layer filled some conducting material. three contacts (two top and one bottom), which resemble classical bipolar or field effect transistor arrangements are, principle, interchangeable when overall electrical resistance...
We have succeeded in growing large-size fractals (\ensuremath{\sim}2--3 cm) solution-casted ion-conducting polymer films of polyethylene oxide doped with ammonium iodide. These are shown to be ``diffusion-limited aggregates'' due iodine ions random walk. This mechanism is supported by energy dispersive x-ray analysis, diffraction, optical absorption, polarization, and complex impedance studies.