Design novel, flexible, and wide-scale CUT-OFF laser filters of Eosin Yellow dye/PVA polymeric composite films: Enhance the electrical conductivity and dielectric properties of PVA

Abstract High-quality polymeric composite films containing Congo red dye and PVA were prepared using the casting technique. The proposed Cr-doped PVA composites were examined using XRD, UV–visible optical, dielectric, and optical limiting effect techniques. The XRD patterns of CR-doped PVA composite films display diffraction peaks, which belong to CR organic dye. There was a broadening and reduction of the initial peak intensity in polymer composite films at higher doping concentrations. The band edge of CR: PVA composites reduced with a massive shift from 4.63 eV to 1.86 e, were Congo red controls the energy bandgap of the PVA polymer. Dielectric permittivity diminishes with increasing the frequency and achieves constant values at higher frequencies through the relation between the electric dipole and the electric field differences. Increasing the percentage ratio of the CR doping enhances the electrical conductivity and dielectric permittivities due to the large size of the CR molecules. The strong optical limiting of the CR-doped PVA composites is determined using different laser sources of 632.8 and 532 nm wavelengths. The amazing obtained results imply that CR: PVA composite films are very significant for applying large-scale CUT-OFF laser filters for medical optical and electronic device systems.

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Optical Analysis and UV-Blocking Filter of Cadmium Iodide-Doped Polyvinyl Alcohol Polymeric Composite Films: Synthesis and Dielectric Properties

Journal of Inorganic and Organometallic Polymers and Materials ◽

10.1007/s10904-020-01534-5 ◽

2020 ◽

Vol 30 (10) ◽

pp. 3940-3952 ◽

Cited By ~ 1

Author(s):

A. Bouzidi ◽

W. Jilani ◽

I. S. Yahia ◽

H. Y. Zahran ◽

M. A. Assiri

Keyword(s):

Dielectric Properties ◽

Polyvinyl Alcohol ◽

Composite Films ◽

Polymeric Composite ◽

Cadmium Iodide ◽

Optical Analysis ◽

Uv Blocking

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AC CONDUCTIVITY AND DIELECTRIC PROPERTIES OF PMMA/FULLERENE COMPOSITES

Modern Physics Letters B ◽

10.1142/s0217984910022962 ◽

2010 ◽

Vol 24 (09) ◽

pp. 911-919 ◽

Cited By ~ 12

Author(s):

G. M. NASR ◽

R. M. AHMED

Keyword(s):

Electrical Conductivity ◽

Dielectric Properties ◽

Frequency Dependence ◽

Room Temperature ◽

Volume Fraction ◽

Polymeric Composite ◽

Dielectric Behavior ◽

Fullerene C60 ◽

Electrical Modulus ◽

Frequency Range

Dielectric properties and electrical conductivity of different concentrations of Poly methylmethacrylate (PMMA)/fullerene C60 composites have been reported at room temperature in the frequency range from 1 kHz to 5 MHz. The frequency dependence of complex permittivity, ε*, and complex electrical modulus, M*, have been measured. Frequency dependence of dielectric constant, follows Cole–Cole dielectric relaxation equations, was investigated diagrammatically. Moreover, equations of Tsangaris et al. have been tested for our case to describe the dielectric behavior of particulate polymeric composite containing fillers which give a satisfactory agreement taking into account the variation of the aspect ratio with the volume fraction of fullerene C60 doped in the PMMA matrix.

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