Preparation, structural and optical investigations of ITO nanopowder and ITO/epoxy nanocomposites

Bouzidi, A.; Omri, K.; Mır, L. El; Guermazi, H.

doi:10.1016/j.mssp.2015.04.051

Cited by 23 publications

(9 citation statements)

References 42 publications

(45 reference statements)

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“…An absorption peak is observed at 380 nm, related to n -Π * HOMO-LUMO transition in the benzene rings. This peak was detected in other works [47,48]. Then a sharp absorption edge takes place due to the band-to-band transition.…”

Section: Optical Characterizationsupporting

confidence: 66%

Exploring the structural properties and enhancement of Opto-electrical investigations for the synthesized epoxy based polymers with local nanoscale structures

Jilani

Fourati

Zerrouki

et al. 2020

Mater. Res. Express

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Epoxy networks of the diglycidyl ether of bisphenol A (DGEBA) were prepared using 4, 4′diaminodiphenyl (44′DDS) and 3, 3′-diaminodiphenyl (33′DDS) sulfone diamines crosslinking hardeners. The structural, linear optical and mechanical properties of the investigated sample were analysed. Dynamic Mechanical Thermal Analysis and wide-angle x-ray diffraction were conducted to select a candidate presenting interesting thermo-mechanical properties and particular nanostructures embedded in an amorphous matrix. Our choice is therefore focused on DGEBA/33′DDS polymer for which, rocking curve measurements revealed the existence of two principal reflecting planes inclined to each other by about 0.27°. To highlight the potential effect of these interfaces, Thermally Stimulated Depolarization Current (TSDC) and Time Domain Spectroscopy measurements have been carried out. The application of the windowing polarization TSDC technique, in DGEBA/33′DDS polymer sample, gives an almost linear variation of the activation energies in the range between 3.65 and 4.09 eV. To our knowledge, this is the first study concerning epoxy polymers in which activation energies associated to ρ interfacial charge relaxations are calculated. To study the effect of the interfaces and trapped charge carriers, correlated by the angle x-ray diffraction measurements, the optical parameters were investigated. Our contribution will open a new avenue for developing the DGEBA/ 33′DDS polymer sustainable candidate in optoelectronic engineering applications.

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Section: Optical Characterizationsupporting

confidence: 66%

Exploring the structural properties and enhancement of Opto-electrical investigations for the synthesized epoxy based polymers with local nanoscale structures

Jilani

Fourati

Zerrouki

et al. 2020

Mater. Res. Express

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“…5b, which shows the absorption spectra of the ITO films with different thicknesses, the adsorption edges shift to higher wavelengths, in good agreement with the transmission data. The band-gap decrease can be due to the structural disorder or oxygen content in the crystalline lattice [25].…”

Section: Resultsmentioning

confidence: 99%

Structural and morphological properties of ITO thin films grown by magnetron sputtering

2015

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Physical properties of transparent and conducting indium tin oxide (ITO) thin films grown by radiofrequency (RF) magnetron sputtering are studied systematically by changing deposition time. The X-ray diffraction (XRD) data indicate polycrystalline thin films with grain orientations predominantly along the (2 2 2) and (4 0 0) directions. From atomic force microscopy (AFM) it is found that by increasing the deposition time, the roughness of the film increases. Scanning electron microscopy (SEM) images show a network of a high-porosity interconnected nanoparticles, which approximately have a pore size ranging between 20 and 30 nm. Optical measurements suggest an average transmission of 80 % for the ITO films. Sheet resistances are investigated using fourpoint probes, which imply that by increasing the film thickness the resistivities of the films decrease to 2.43 9 10 -5 X cm.

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“…This clearly shows that the physicochemical mechanisms are different between the first and last runs. [29]. The thermal heating induces the post-crosslinking of the polymer network that could stabilize the structures of the PEI resin.…”

Section: Post-cross-linking Effects On Dielectric Propertiesmentioning

confidence: 99%

Mechanical, dielectric, and physicochemical properties of impregnating resin based on unsaturated polyesterimides

Fetouhi

Petitgas²,

Dantras

et al. 2017

Eur. Phys. J. Appl. Phys.

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Abstract. This work aims to characterize the dielectric and the mechanical properties of a resin based on an unsaturated polyesterimide diluted in methacrylate reactive diluents used in the impregnation of rotating machines. The broadband dielectric spectrometry and the dynamic mechanical analysis were used to quantify the changes in dielectric and mechanical properties of the network PEI resin, as a function of temperature and frequency. The network characterizations highlight the presence of two main relaxations, a and a 0 , confirmed by the differential scanning calorimetry analysis, showing the complexity of the chemical composition of this resin. The dielectric spectroscopy shows a significant increase in the dielectric values due to an increase of the material conductivity, while the mechanical spectroscopy shows an important decrease of the polymer rigidity and viscosity expressed by an important decrease in the storage modulus. The PEI resin shows a high reactivity when it is submitted in successive heating ramps, which involves in a post-cross-linking reaction.

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Preparation, structural and optical investigations of ITO nanopowder and ITO/epoxy nanocomposites

Cited by 23 publications

References 42 publications

Exploring the structural properties and enhancement of Opto-electrical investigations for the synthesized epoxy based polymers with local nanoscale structures

Exploring the structural properties and enhancement of Opto-electrical investigations for the synthesized epoxy based polymers with local nanoscale structures

Structural and morphological properties of ITO thin films grown by magnetron sputtering

Mechanical, dielectric, and physicochemical properties of impregnating resin based on unsaturated polyesterimides

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