Fabrication of new nanocomposites: (PVA-PEG-PVP) blend-zirconium oxide nanoparticles) for humidity sensors

Agool, Ibrahim R.; Kadhim, Kadhim J.; Hashim, Ahmed

doi:10.1007/s12588-017-9192-5

Cited by 61 publications

(32 citation statements)

References 7 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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“…The nanocomposites applications are promising in the industrial and medical approaches of sensors, medical devices, drug delivery, coatings, adhesives, optical integrated circuits, automobiles, microelectronic packaging, injection molded products, packaging materials, aerospace etc. [6][7][8][9]. Polymers have several advantages such as the low cost, easy processing, high strength, flexibility, and good mechanical properties [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

Hashim

Hadi

2018

Ukr. J. Phys.

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This paper aims to the preparation of novel pressure-sensitive nanocomposites with low cost, light weight, and good sensitivity. The nanocomposites of polyvinyl alcohol, polyacrylic acid, and lead oxide nanoparticles have been investigated. The dielectric properties and dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites have been studied. The dielectric properties of nanocomposites were measured in the frequency range (100 Hz–5 MHz). The experimental results showed that the dielectric constant and dielectric loss of (PVA–PAA–PbO2) nanocomposites decrease, as the frequency increases, and they increase with the concentrations of PbO2 nanoparticles. The ac electrical conductivity of (PVA–PAA–PbO2) nanocomposites increases with the frequency and the concentrations of PbO2 nanoparticles. The dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites also increases with the concentrations of PbO2 nanoparticles. The application of pressure-sensitive nanocomposites has been examined in the pressure interval (60–200) bar. The results showed that the electrical resistance of (PVA–PAA–PbO2) pressure-sensitive nanocomposites decreases, as the compressive stress increases. The (PVA–PAA–PbO2) nanocomposites have high sensitivity to pressure.

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“…The addition of inorganic nanoparticles to polymers allows a modification of the polymer physical properties, as well as the implementation of new features in the polymer matrix. With decreasing the particle size, the surface/volume ratio increases, so that the surface properties become crucial [6,7]. The applications of nanocomposites are quite promising in the fields of microelectronic packaging, medicine, automobiles, optical integrated circuits, drug delivery, injection molded products, sensors, membranes, aerospace, packaging materials, coatings, fire-retardants, adhesives, consumer goods, etc.…”

Section: Introductionmentioning

confidence: 99%

Development of a New Humidity Sensor Based on (Carboxymethyl Cellulose–Starch) Blend with Copper Oxide Nanoparticles

Hadi

Hashim

2017

Ukr. J. Phys.

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We have synthesized a nanocomposite of a new type as a humidity sensor and studied its electric and optical properties. The carboxymethyl cellulose-starch-copper oxide nanocomposite is prepared with different concentrations of copper oxide nanoparticles. The DC electric conductivity of the carboxymethyl cellulose-starch-copper oxide system was tested at room temperature. The results show that the DC conductivity of the blend increases with the copper oxide concentration. The optical properties of the nanocomposite are measured in the range of wavelengths (220-800) nm. The results show that the absorbance of the blend increases with the concentration of copper oxide nanoparticles, whereas the energy band gap decreases. With the purpose to use the system as a humidity sensor, its electric capacitance was measured on different samples in the range of humidity (40-90) RH%. The experimental results have shown that the carboxymethyl cellulose-starch-copper oxide nanocomposite has a higher sensivity in the humidity range (60-90) RH%.

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Fabrication of new nanocomposites: (PVA-PEG-PVP) blend-zirconium oxide nanoparticles) for humidity sensors

Cited by 61 publications

References 7 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

Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

Development of a New Humidity Sensor Based on (Carboxymethyl Cellulose–Starch) Blend with Copper Oxide Nanoparticles

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