Synthesis, DFT studies, fabrication, and optical characterization of the [ZnCMC]<sup>TF</sup> polymer (organic/inorganic) as an optoelectronic device

Abd-Elmageed, A.A.I.; Ibrahim, S. A.; Bourezgui, A.; El-Shazly, A.H.

doi:10.1039/d0nj01719a

Cited by 70 publications

(20 citation statements)

References 61 publications

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“…In addition, Cr-Ni OSC complexes are observed to exhibit energy band gaps of ~1.87 eV which nominates it for use in visible light communications as signal receivers 3 . Moreover, carboxymethyl cellulose zinc thin films which were fabricated using the sol-gel technique and widely tested are found to be ideal materials for use in producing photosensors and solar cells 6,7 . As nanoparticles, Co-Al oxides are reported promising alternative materials for improving the power conversion efficiency of solar cells and for obtaining clean and renewable energy 4 .…”

Section: Introductionmentioning

confidence: 99%

Band Offsets, Optical Conduction, Photoelectric and Dielectric Dispersion in InSe/Sb2Te3 Heterojunctions

2021

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InSe based heterojunction devices gain importance in optoelectronic applications in NIR range as multipurpose sensors. For this reason, InSe/Sb 2 Te 3 heterojunctions are constructed as NIR sensors by the thermal evaporation technique. The structural, optical, dielectric and photoelectric properties of InSe/Sb 2 Te 3 heterojunctions are explored by X-ray diffraction and ultraviolet-visible light spectrophotometry techniques. The structural analyses revealed the preferred growth of polycrystalline hexagonal Sb 2 Te 3 onto amorphous InSe as a major phase. Optically, the coating of Sb 2 Te 3 onto InSe enhanced the light absorbability of InSe by more than 18 times, redshifts the energy band gap, increased the dielectric constant by ~5 times and increased the optical conductivity by 35 times in the NIR range of light. A conduction and valance band offsets of 0.40 and 0.68 eV are determined for the InSe/Sb 2 Te 3 heterojunction devices. In addition, the Drude-Lorentz fittings of the optical conductivity indicated a remarkable increase in the plasmon frequency values upon depositing of Sb 2 Te 3 onto InSe. The illumination intensity and time dependent photocurrent measurements resulted in an enhancement in the photocurrent values by one order of magnitude. The response time of the devices is sufficiently short to nominate the InSe/Sb 2 Te 3 heterojunction devices as fast responding NIR sensors suitable for optoelectronic applications.

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Section: Introductionmentioning

confidence: 99%

Band Offsets, Optical Conduction, Photoelectric and Dielectric Dispersion in InSe/Sb2Te3 Heterojunctions

2021

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“…Again, the product was also defined by the FTIR spectral bands 54–56 observed at frequency 3636 cm −1 that define the −OH group in BTB and this band is shifted to 3430 cm −1 ; so this indicates the oxidation occurs in the hydroxyl group. Finally, the band found at 1593 cm −1 54–56 characterizing the carbonyl group with related ketones; a strong band occurs at 3157 cm −1 characterizing the CH 2 group 57–59 in the case with BTB while it seems to be the weak band at 2954 cm −1 in the case of keto‐BTB characterizing the −CH group 60–61 . Enhancement of the OH group's absorption band at a wavenumber of 1593 cm −1 in the product's FTIR spectra that mean oxidation of the OH group present in BTB dye to its corresponding keto‐forms as shown in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Oxidation process and kinetics of bromothymol blue by alkaline permanganate

Al‐Hossainy

Ibrahim

2020

Int J of Chemical Kinetics

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Spectrophotometric analysis was applied to check the kinetics of bromothymol blue (BTB) oxidation by alkaline permanganate at constant ionic strength 0.2 mol dm−3. The redox reaction was observed to proceed through two independently distinct, detectable steps. The first step coexists with the formation of intermediate complexes involving transient species relatively quickly of the blue hypomanganate(V) and green manganate(VI). The slowly decomposed intermediate formed to produce soluble colloidal manganese(IV) and the BTB keto‐derivatives as second slow‐stage oxidation products. The oxidation reaction demonstrated first‐order dependence in [MnO4−] and fractional first‐order kinetics at each of the BTB and alkali concentrations at an initial rapid stage for complexes formation. It was found that the oxidation process is of a base‐catalyzed nature. Novel spectrophotometric measurement of the blue hypomanganate(V) was introduced using a traditional spectrophotometer. An effective oxidation mechanism compatible with the kinetic data obtained in terms of the activation parameters assessed was analyzed, proposed, and discussed in line with the kinetic findings.

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“…The surface charge of nanoparticles is pH-dependent and raises the intrinsic properties of the oxides on their surface. Observed agglomeration could be due to this fact [ 25 , 26 , 36 ]. The results showed that the treatment of Wistar rats with different concentrations of Al 2 O 3 nanoparticles led to changes in bone tissue.…”

Section: Discussionmentioning

confidence: 99%

Evaluating the Toxicity and Histological Effects of Al2O3 Nanoparticles on Bone Tissue in Animal Model: A Case-Control Study

Soltaninejad

Zare‐Zardini

Hamidieh

et al. 2020

Journal of Toxicology

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The applications of nanostructures have been limited by their different toxicities. So, the investigation of these toxicities is necessary before nanostructure application. This study aimed to evaluate the effect of aluminum oxide (Al2O3) nanoparticles on bone density in Wistar rat. Al2O3 nanoparticle was prepared by the sol-gel method. Characterization was done by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Sixty-four male adult Wistar rats were divided into eight groups including six groups intravenously treated with Al2O3 nanoparticle at concentrations of 25, 50, 100, 250, 500, and 1000 µg/ml: one group received food and water as the control group, and one group received food and water as well as intravenously distilled water as an injection control group. After 41 days, bone density was analyzed by dual-energy X-ray absorptiometry (DEXA). According to X-ray diffraction, the average particle size for Al2O3 nanoparticles was 20.85 nm. The data of densitometry showed that the bone density of right and left foot was reduced in concentrations of 250, 500, and 1000 µg/ml that were statistically significant in comparison with the control group. The reduction of bone density was increased with the enhancement of nanostructures concentration. The effect of Al2O3 nanoparticles on bone density was similar in the left and right legs. Histopatholological assessment also showed that Al2O3 nanoparticles (250, 500, and 1000 µg/ml) lead to significant reduction of trabeculae. Empty lacunae are observed in these three groups. Considering that high concentrations of Al2O3 nanoparticles had toxicity on bone tissue, it must be used by more caution, especially its use as a coating in different devices such as implants, surgical instruments, and bone prostheses.

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Synthesis, DFT studies, fabrication, and optical characterization of the [ZnCMC]^TF polymer (organic/inorganic) as an optoelectronic device

Abstract: A novel carboxymethyl cellulose zinc thin film [ZnCMC]TF was fabricated using the sol–gel technique.

Cited by 70 publications

References 61 publications

Band Offsets, Optical Conduction, Photoelectric and Dielectric Dispersion in InSe/Sb2Te3 Heterojunctions

Band Offsets, Optical Conduction, Photoelectric and Dielectric Dispersion in InSe/Sb2Te3 Heterojunctions

Oxidation process and kinetics of bromothymol blue by alkaline permanganate

Evaluating the Toxicity and Histological Effects of Al2O3 Nanoparticles on Bone Tissue in Animal Model: A Case-Control Study

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Synthesis, DFT studies, fabrication, and optical characterization of the [ZnCMC]TF polymer (organic/inorganic) as an optoelectronic device

Abstract: A novel carboxymethyl cellulose zinc thin film [ZnCMC]TF was fabricated using the sol–gel technique.

Cited by 70 publications

References 61 publications

Band Offsets, Optical Conduction, Photoelectric and Dielectric Dispersion in InSe/Sb2Te3 Heterojunctions

Band Offsets, Optical Conduction, Photoelectric and Dielectric Dispersion in InSe/Sb2Te3 Heterojunctions

Oxidation process and kinetics of bromothymol blue by alkaline permanganate

Evaluating the Toxicity and Histological Effects of Al2O3 Nanoparticles on Bone Tissue in Animal Model: A Case-Control Study

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Synthesis, DFT studies, fabrication, and optical characterization of the [ZnCMC]^TF polymer (organic/inorganic) as an optoelectronic device