Analysis of Structural, Optical and Electronic Properties of Polymeric Nanocomposites/Silicon Carbide for Humidity Sensors

Hashim, Ahmed; Abduljalil, Hayder M.

doi:10.1007/s42341-019-00100-2

Cited by 63 publications

(19 citation statements)

References 31 publications

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“…As a result, it shows that absorption increases by increasing the number of atoms, this is due to the excitations of donor level electrons to the conduction band at these energies. The high absorbance of samples for nanocomposites at UV-Vis region attributed to the energy of photon enough to interact with atoms; the electron excites from a lower to higher energy level by absorbing a photon of known energy [28][29][30][31][32][33][34][35][36]. This behavior consistent with the results of researchers [37].…”

Section: Valuessupporting

confidence: 81%

Analysis of Optical, Electronic and Spectroscopic properties of (Biopolymer-SiC) Nanocomposites For Electronics Applications

Hashim¹,

Abduljalil

2019

Egypt. J. Chem.

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I N THIS paper, studying the effect of increase the number of SiC nanoparticles atoms on the optimized geometrical parameters, electronic and spectroscopic properties of polyvinyl alcohol. The studied structures are (PVA)(43Atom), (PVA-SiC)(35 Atom) and (PVA-SiC)(51Atom) nanocomposites. The optimization parameters included both bonds and angles. The electronic and structural properties included the (energy gap, cohesive energy, ionization potential, electron affinity, chemical hardness, chemical softness, electronegativity, electrophilicity and density of states) as well as spectral properties, which included IR and UV-Visible. This study uses Gaussian 0.9 program with help of Gaussian View 0.5 using density function theory (DFT) with local spin density approximation B3LYP level and6-31Gbasis sets. The results showed that the number of atoms has a direct impact on all the properties of the molecules studied. The increase of number of atoms is caused changes in spectral of (PVA) which include shift in some bonds and change in the intensities. These changes attributed to interactions of nanoparticles (SiC) with (PVA). Also, from Ultra Violet and Visible spectrum observed that absorption increases by increasing the number of atoms, this is due to the excitations of donor level electrons to the conduction band at these energies. The energy gap of the nanocomposites reduces from 6.8568 eV for (PVA) to5.0715 eV for (PVA-SiC)(35Atom) and 4.5330 eV for (PVA-SiC)(51Atom). The total energies decreases with the increase the number of atoms forming the nanocomposites. The results showed that the nanocomposites can be used for different applications such as: solar cells, diodes, transistors, sensors, electronics gates, electronics devices.

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Section: Valuessupporting

confidence: 81%

Analysis of Optical, Electronic and Spectroscopic properties of (Biopolymer-SiC) Nanocomposites For Electronics Applications

Hashim¹,

Abduljalil

2019

Egypt. J. Chem.

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“…(4) as shown in Fig. 3 and 4, it decreases with increasing the ZnCoFe 2 O 4 , this attributed to the decrease in the distant between the conduction band and valance band with the increase in ZnCoFe 2 O 4 concentration [36].…”

Section: The Absorption Coefficient and Energy Gap Of Compositementioning

confidence: 74%

Structural and Optical Properties of Novel (PS-Cr2O3/ ZnCoFe2O4) Nanocomposites For UV and Microwave Shielding

Habeeb

Hashim²,

Hayder

2019

Egypt. J. Chem.

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“…The absorption coefficient of (PMMA-ZrO 2 -Ag) nanocomposites is increased with the increase of the adding of Ag nanoparticle, this is property to the increase of number of charge carriers, hence,increase the absorbance of (PMMA-ZrO 2 -Ag) and absorption coefficient[28][29][30][31][32][33].Figures(12)(13)(14)indicate the energy gap for allowed indirect transition of nanocomposites. From the figures observed the energy gap of (PMMA-ZrO 2 -Ag) nanocomposites is decreased with the increase of the addingAg nanoparticle, due tothe creation sub levels between valance and conduction bands; as a result of addition of the Ag nanoparticle[34][35][36][37][38][39]. Figures(15)(16)(17)showthe variation of real dielectric constant (ε 1 ) as a function of wavelength for (PMMA-ZrO 2 -Ag) nanocomposites.…”

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confidence: 92%

Novel (PMMA-ZrO2-Ag) Nanocomposites: Structural, Electronic, Optical Properties as Antibacterial for Dental Industries

Hazim¹

2019

IJETER

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Poly-methylmethacrylate (PMMA)was widely accepted material in dental and medical fieldsbecause of the excellent biocompatibility and easy fabrication. In current paper, study the geometrical parameters, electronic and optical properties of the (PMMA-ZrO 2 -Ag)nanostructures. The electronic properties include electrochemical hardness and electronic softness while the optical properties include absorbance, transmittance, absorption coefficient, extinction coefficient, refractive index, real and imaginary parts of dielectric constants and optical conductivity. The properties calculated by using Gaussian 0.9 program with Gaussian View 0.5 using density function theory (DFT) with local spin density approximation B3LYP level, 6-31G and STO-3D basis sets. The results showed that the addition of Ag nanoparticles lead to decrease the chemical hardness and increase in the softness. The optical properties for (PMMA-ZrO 2 -Ag) nanocomposites showed that the absorbance, absorption coefficient, extinction coefficient, refractive index, real and imaginary parts of dielectric constants and optical conductivity of (PMMA-Al 2 O 3 ) nanocomposites increase while the transmittance and energy band gap decrease with increase in Ag nanoparticles concentrations. The antibacterial results showed that the (PMMA-ZrO 2 -Ag) nanocomposites have good antibacterial for positive and negative gram organisms.

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Analysis of Structural, Optical and Electronic Properties of Polymeric Nanocomposites/Silicon Carbide for Humidity Sensors

Cited by 63 publications

References 31 publications

Analysis of Optical, Electronic and Spectroscopic properties of (Biopolymer-SiC) Nanocomposites For Electronics Applications

Analysis of Optical, Electronic and Spectroscopic properties of (Biopolymer-SiC) Nanocomposites For Electronics Applications

Structural and Optical Properties of Novel (PS-Cr2O3/ ZnCoFe2O4) Nanocomposites For UV and Microwave Shielding

Novel (PMMA-ZrO2-Ag) Nanocomposites: Structural, Electronic, Optical Properties as Antibacterial for Dental Industries

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