A5087779650- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Dielectric materials and actuators
- Ferroelectric and Piezoelectric Materials
- Gas Sensing Nanomaterials and Sensors
- Innovative Energy Harvesting Technologies
- Mechanical and Optical Resonators
- ZnO doping and properties
- Multiferroics and related materials
- Fiber-reinforced polymer composites
- Polymer Nanocomposites and Properties
- Ga2O3 and related materials
- Polydiacetylene-based materials and applications
- Analytical Chemistry and Sensors
- Luminescence and Fluorescent Materials
- Graphene research and applications
- Supercapacitor Materials and Fabrication
- Copper-based nanomaterials and applications
- Force Microscopy Techniques and Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Molecular Junctions and Nanostructures
- Magnetic and transport properties of perovskites and related materials
- Tactile and Sensory Interactions
Manipal University Jaipur
2019-2024
Manipal Academy of Higher Education
2023
National Institute of Technology Calicut
2013-2021
The present work deals with the preparation, characterization, and application of self-poled nanofibers using piezoelectric polymer poly(vinylidene fluoride-trifluoroethylene), zinc oxide, exfoliated graphene oxide by electrospinning process. characterization nanofiber is carried different techniques such as field emission scanning electron microscopy, Fourier transform Infrared spectroscopy, X-ray diffraction techniques, dynamic contact mode electrostatic force microscopy. based nanoenergy...
The effect of barium titanate (BaTiO3) nanoparticles (particle size <100nm) on the ferroelectric properties poly (vinylidenefluoride-trifluoroethylene) P(VDF-TrFE) copolymer has been studied. Different concentrations were added to using probe sonication, and uniform thin films made. Polarisation - Electric field (P-E) hysteresis analysis shows an increase in remnant polarization (Pr) decrease coercive voltage (Vc). Piezo-response force microscopy switching capability polymercomposite....
Barium titanate nanoparticles with an average size of <100 nm were added to poly(vinylidene fluoride-trifluoroethylene) copolymer in varying concentrations (0.2, 0.4, 0.6, and 0.8 wt%) liquid phase under bath sonication annealed at 120°C for 2 h. The Fourier transform infrared spectroscopy, X-ray diffraction, Raman Differential scanning calorimetry studies reveals increase the β-phase content nanocomposite, which is a promising inference increased ferroelectric property material. Scanning...
We report the preparation, thermal and micro/nanomechanical behavior of poly (vinylidine diflouride) (PVDF)/multiwalled carbon nanotube (MWCNT) nanocomposites. It has been found that addition MWCNT considerably enhances β-phase formation, mechanical properties PVDF. Atomic force microscope (AFM) studies have performed on composites under stress conditions to measure properties. The nanoscale like Young's modulus hardness nanocomposites were investigated by nanoindentation technique....
Abstract The purpose of this study is to analyse the importance micro-strain in affecting band gap and photoluminescence (PL) intensity sol-gel-spin-coated Ce-doped ZnO thin films on glass slides. presence (100) plane fabricated film was discovered using x-ray diffraction thereby indicating strongly orientated monocrystalline hexagonal wurtzite phase. On doping with Ce, changed from (2.49–4.84) × 10 –3 , crystallite size ranged 26.23 43.03 nm. UV-visible spectroscopy revealed that optical...
Polymer nanocomposite was prepared using poly(vinylidene fluoride-trifluoroethylene) and zinc oxide (ZnO) nanopowder, which are ferroelectric in nature. Nanocomposite various concentrations(0.2, 0.4, 0.8, 1 wt. %) probe ultra-sonication, followed by spin coating annealing at 120 °C for 2 h to improve the formation of β-phase. Metal-ferroelectric-metal capacitor fabricated this optimized thin film as a layer. Device level optimization carried out polarization-electric field (P-E) hysteresis...
The manuscript introduces the use of non-electrically polled spin-coated thin polyvinylidene fluoride (PVDF) films as active layers in a contact electrification-based nanoenergy harvester. four-layered device utilizes both piezo and triboelectric effect coupled with electrostatic induction. elucidation potential generation during between crystalline phases ( α β) PVDF layer material is investigated manuscript. Fourier transform infrared–attenuated total reflectance spectroscopy carried out...
Abstract The ferroelectric field effect transistor (FeFET) using Poly (vinylidene fluoride‐trifluoroethylene)/Barium titanate [P(VDF‐TrFE)/BaTiO 3 ] polymer nanocomposite as dielectric layer, has been fabricated and characterized. P(VDF‐TrFE)/BaTiO of 300 nm thin film over 10 SiO 2 was used in the optimized fabrication process sequence FeFET. addition BaTiO nanoparticle to P(VDF‐TrFE) copolymer enhanced property with an observed V difference memory window. temperature frequency on these...
This work aims at the manipulation of nanoscopic voltage produced through uniform and non‐uniform rubbing in neat unpolarised polymer polyvinylidene fluoride. A metal–insulator configuration is considered for analysis. The decay surface potential such a also addressed this work. polarity observed on film depends function metal electrode contact as well electronegativity polymeric material under study. Scanning probe microscopic techniques dynamic mode electrostatic force microscopy, scanning...
Undoped and 8 at. % Al doped ZnO films are deposited on glass substrates by sol-gel spin coating. The XRD patterns reveal polycrystalline nature of the with hexagonal Wurtzite phase. particle sizes calculated via Debye Scherrer formula lie between 21 to 66 nm. Presence tensile strain is observed Williamson Hall analysis. Almost 3.5 times enhancement happens when dopant introduced as compared undoped ZnO. FE-SEM images show diverse structures there no dopant. doping causes uniform even...
Single layer graphite, popularly known as graphene, has attracted much scientific interest in recent years due to its outstanding mechanical, thermal, and electrical properties.Recent research confirms graphene is ideal a nano filler improve physical chemical properties of polymers.In this study, we aim understand the structural morphological their modifications occurring during nanocomposite fabrication.Polyvinylidene fluoride/reduced oxide (PVDF/rGO) based polymer nanocomposites were...