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Datta, Pranayee
- Low-pass Filter Characteristics of Zns:Cu Quantum Dots Embedded in Polyvinyl Alcohol (PVA)
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Chemical route is used to prepare ZnS:Cu nanocrystals embedded in Polyvinyl Alcohol (PVA). The UV-Vis spectroscopy of the prepared sample shows an absorption peak at 301 nm. PL spectra show an emission peak at 400 nm. The gain vs frequency curve of the samples is identical to the characteristics curve of a Low Pass filter. The frequency response of the prepared samples shows their possible applications as Law Pass Filter.
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International Journal of Innovative Research and Development, Vol 1, No 7Sp (2012), Pagination: 48-55Abstract
Zinc Sulphide (ZnS) is a group II-VI semiconductor having a large band gap of 3.54 eV for cubic and 3.91 eV for hexagonal structures which can be further increased by reducing the size. The physical and electrical properties of these nanocomposites changes significantly when doped with other suitable materials. In this paper we report synthesis, characterization and Low-Pass filter characteristics of ZnS:Cu nanoparticles embedded in PVA matrix.Chemical route is used to prepare ZnS:Cu nanocrystals embedded in Polyvinyl Alcohol (PVA). The UV-Vis spectroscopy of the prepared sample shows an absorption peak at 301 nm. PL spectra show an emission peak at 400 nm. The gain vs frequency curve of the samples is identical to the characteristics curve of a Low Pass filter. The frequency response of the prepared samples shows their possible applications as Law Pass Filter.
Keywords
ZnS: Cu Nanoparticles, Low Pass Filter, Frequency Response- Development and Performance Analysis of High Energy Density Thin Film Capacitors with Ag/Pva Nanocomposites as Dielectric Medium
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International Journal of Innovative Research and Development, Vol 1, No 7Sp (2012), Pagination: 83-91Abstract
In recent years, the need for light weight, compact, high energy density capacitor increases rapidly for applications in various household as well as industrial appliances. The previously used monolithic materials are reaching a plateau in terms of energy storage capabilities due to the trade-off between dielectric constant, dielectric loss and voltage breakdown. The metal polymer nanocomposites have the potential to overcome these limitations through a synergistic coupling of high dielectric constant nanoparticles in high dielectric breakdown polymer matrices based on their characteristics like Coulomb Blockade Effect, Interfacial Polarization Effect etc. Here, we present the synthesis and characterization of Ag/PVA nanocomposites and investigate the dielectric properties of these materials in thin film capacitors in terms of energy density, dielectric constant and dielectric loss.Keywords
Nanocomposites, Dielectric, Thin Film Capacitor- Optical and Structural Properties of Pbs Nanoparticles Embedded in Starch
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