20 results on '"Essid, M."'
Search Results
2. Study of Electrical and Dielectric Behaviors of Copper-Doped Zinc Oxide Ceramic Prepared by Spark Plasma Sintering for Electronic Device Applications
- Author
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Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo, Universidad de Sevilla. Departamento de Física de la Materia Condensada, Benamara, M., Nassar, KI, Rivero Antúnez, Pedro, Essid, M., Teixeira, Silvia Soreto, Zhao, Shanyu, Serra, A., Esquivias Fedriani, Luis María, Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo, Universidad de Sevilla. Departamento de Física de la Materia Condensada, Benamara, M., Nassar, KI, Rivero Antúnez, Pedro, Essid, M., Teixeira, Silvia Soreto, Zhao, Shanyu, Serra, A., and Esquivias Fedriani, Luis María
- Abstract
In this study, Cu-doped ZnO aerogel nanoparticles with a 4% copper concentration (Cu4ZO) were synthesized using a sol–gel method, followed by supercritical drying and heat treatment. The subsequent fabrication of Cu4ZO ceramics through Spark Plasma Sintering (SPS) was characterized by X-ray diffraction (XRD), field-emission gun scanning electron microscopy (FE-SEM) equipped with EDS, and impedance spectroscopy (IS) across a frequency range of 100 Hz to 1 MHz and temperatures from 270 K to 370 K. The SPS–Cu4ZO sample exhibited a hexagonal wurtzite structure with an average crystallite size of approximately 229 ± 10 nm, showcasing a compact structure with discernible pores. The EDS spectrum indicates the presence of the base elements zinc and oxygen with copper like the dopant element. Remarkably, the material displayed distinct electrical properties, featuring high activation energy values of about 0.269 ± 0.021 eV. Complex impedance spectroscopy revealed the impact of temperature on electrical relaxation phenomena, with the Nyquist plot indicating semicircular arc patterns associated with grain boundaries. As temperature increased, a noticeable reduction in the radius of these arcs occurred, coupled with a shift in their center points toward the axis center, suggesting a non-Debye-type relaxation mechanism. Dielectric analyses revealed a temperature-driven evolution of losses, emphasizing the material’s conductivity impact. Non-Debye-type behavior, linked to ion diffusion, sheds light on charge storage dynamics. These insights advance potential applications in electronic devices and energy storage.
- Published
- 2024
3. Photocatalytic degradation of a pharmaceutical pollutant (Levofloxacin) by two-hybrid photocatalysts g-C3N4/TiO2 and WO3/TiO2: comparative study.
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Trifi, B., Nahdi, A., Othmani, A., Aloui, Z., Essid, M., and Dhaouadi, H.
- Abstract
The present paper reports the photodegradation of a pharmaceutical pollutant, Levofloxacin, in an aqueous solution using two photocatalyst nanocomposites, g-C
3 N4 /TiO2 and WO3 /TiO2 , under the influence of solar light and UV irradiation. These as-designed nano-heterostructures were synthesized using the hydrothermal method without organic templates or additives. The characterization results revealed that the used preparation method grants the purity of the prepared composites and gives a nanoscale character product. The effects of the weight ratio of g-C3 N4 /TiO2 and WO3 /TiO2 , the mass of the catalyst and the initial concentration of Levofloxacin on the photocatalytic activity were evaluated under UV light. Results showed that 5 mg/L of Levofloxacin with 20 mg of the prepared nanocomposite with a 5% weight ratio of g-C3 N4 and WO3 allowed a quasi-total degradation of the pharmaceutical pollutant within only 30 min. The photocatalytic activities investigation of the prepared nanocomposites under sunlight irradiation showed that after 50 min of treatment, 66% of degradation is reached with WO3 /TiO2 against 100% with g-C3 N4 /TiO2 . The possible photocatalytic mechanism was thoroughly investigated, explaining the improved photocatalytic activity. This work demonstrates that the prepared nanocomposites' photocatalytic degradation of pharmaceutical pollutants is efficient, providing a friendly environmental strategy. [ABSTRACT FROM AUTHOR]- Published
- 2024
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4. Photocatalytic degradation of a pharmaceutical pollutant (Levofloxacin) by two-hybrid photocatalysts g-C3N4/TiO2 and WO3/TiO2: comparative study
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Trifi, B., primary, Nahdi, A., additional, Othmani, A., additional, Aloui, Z., additional, Essid, M., additional, and Dhaouadi, H., additional
- Published
- 2023
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5. P412 Expanding the clinical and genetic spectrum of biallelic pathogenic MYO18B variants in congenital myopathy
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Donkervoort, S., primary, Zaharieva, I., additional, Essid, M., additional, Longman, C., additional, Foley, A., additional, Horrocks, I., additional, Benrhouma, H., additional, Farrugia, M., additional, Neuhaus, S., additional, Younes, T., additional, Youssef-Turki, I., additional, Jamshidi, Y., additional, Chao, K., additional, Houlden, H., additional, Maroofian, R., additional, Bönnemann, C., additional, Muntoni, F., additional, and Sarkozy, A., additional
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- 2023
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6. A transposase-derived gene required for human brain development.
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Zapater LJ, Lewis SA, Gutierrez RL, Yamada M, Rodriguez-Fos E, Planas-Felix M, Cameron D, Demarest P, Nabila A, Mueller H, Zhao J, Bergin P, Reed C, Chwat-Edelstein T, Pagnozzi A, Nava C, Bourel-Ponchel E, Cornejo P, Dursun A, Özgül RK, Akar HT, Maroofian R, Houlden H, Cheema HA, Anjum MN, Zifarelli G, Essid M, Ben Hafsa M, Benrhouma H, Montoya CIG, Proekt A, Zhao X, Socci ND, Hayes M, Bigot Y, Rabadan R, Torrents D, Kleinmann CL, Kruer MC, Toth M, and Kentsis A
- Abstract
DNA transposable elements and transposase-derived genes are present in most living organisms, including vertebrates, but their function is largely unknown. PiggyBac Transposable Element Derived 5 (PGBD5) is an evolutionarily conserved vertebrate DNA transposase-derived gene with retained nuclease activity in human cells. Vertebrate brain development is known to be associated with prominent neuronal cell death and DNA breaks, but their causes and functions are not well understood. Here, we show that PGBD5 contributes to normal brain development in mice and humans, where its deficiency causes disorder of intellectual disability, movement, and seizures. In mice, Pgbd5 is required for the developmental induction of post-mitotic DNA breaks and recurrent somatic genome rearrangements. In the brain cortex, loss of Pgbd5 leads to aberrant differentiation and gene expression of distinct neuronal populations, including specific types of glutamatergic neurons, which explains the features of PGBD5 deficiency in humans. Thus, PGBD5 might be a transposase-derived enzyme required for brain development in mammals., Competing Interests: Competing interests: Authors declare that they have no competing interests. AK is a consultant for Novartis, Rgenta, Blueprint, and Syndax. RR is a founder and a member of the SAB of Genotwin, and a member of the SAB of Diatech Pharmacogenetics. None of these activities are related to the work described in this manuscript.
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- 2024
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7. Crystal Structural Characteristics and Electrical Properties of Novel Sol-Gel Synthesis of Ceramic Bi 0.75 Ba 0.25 (FeMn) 0.5 O 3 .
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Tayari F, Dhahri R, Elkenany EB, Teixeira SS, Graça MPF, Al-Syadi AM, Essid M, and Iben Nassar K
- Abstract
In this investigation, our primary objective is to explore the structural, morphological, and electrical characteristics of Bi
0.75 Ba0.25 (FeMn)0.5 O3 ceramic material synthesized by the sol-gel method. The prepared sample underwent synthesis through the conventional sol-gel technique. Examination through X-ray diffraction (XRD) unveiled a well-defined rhombohedral structure within the R3´C space group. Moreover, to evaluate the purity and nano-grain morphology, we utilized energy dispersive spectroscopy (EDX) and scanning electron microscopy (SEM). Electrical assessments were carried out over a frequency span of 100 Hz to 1 MHz and temperatures ranging from 200 to 340 K. Employing the correlated barrier hopping (CBH) model, we analyzed the AC conductivity of our specimen. The activation energy, determined from both DC conductivity and impedance spectra, demonstrated close correspondence, suggesting that both conductivity and r laxation processes are influenced by similar factors. Notably, the dielectric properties hold significant importance, potentially rendering our sample suitable for electronic applications. Furthermore, we calculated thermodynamic parameters, such as enthalpy (ΔH), entropy change (ΔS), and free energy of activation (ΔF), offering deeper insights into the material's behavior and conductivity mechanisms.- Published
- 2024
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8. Tailoring of structural, morphological, electrical, and magnetic properties of LaMn 1- x Fe x O 3 ceramics.
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Thakur P, Nassar KI, Kumar D, Kumar P, Sharma P, Tirth V, Alosaimy AS, Algahtani A, Essid M, and Lal M
- Abstract
This study undertakes a comparative analysis of the structural, morphological, electrical, and magnetic characteristics of Fe-doped LaMnO
3 ceramics. The solid-state reaction method was used to prepare Fe-doped LaMnO3 at different concentrations (0.00 ≤ x ≤ 1.00) and has been characterized using X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), and vibrating sample magnetometry (VSM). The structural transformation from rhombohedral to orthorhombic with Fe-doping is demonstrated by Rietveld's refined XRD patterns. The positive slope in Williamsons-Hall's (W-H) plots confirms the presence of tensile strain with increasing average crystallite size. Quasi-spherical morphology of all the compositions with similar uniformity was confirmed by FESEM images. The chemical distribution of all the elements has been identified by EDS mapping images. Normal dielectric dispersion behaviour of all the samples with NTCR response is confirmed by dielectric and impedance analysis respectively. Increasing lattice volume with Fe-concentration results is increasing Ea . The presence of antiferromagnetic ordering, in addition to weak ferromagnetic ordering, is indicated by the unsaturated magnetization even up to a high external field. The decrease in MS and increase in HC values due to Fe-doping reflect the influence of particle size on various magnetic parameters., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (This journal is © The Royal Society of Chemistry.)- Published
- 2024
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9. RTN2 deficiency results in an autosomal recessive distal motor neuropathy with lower limb spasticity.
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Maroofian R, Sarraf P, O'Brien TJ, Kamel M, Cakar A, Elkhateeb N, Lau T, Patil SJ, Record CJ, Horga A, Essid M, Selim L, Benrhouma H, Ben Younes T, Zifarelli G, Pagnamenta AT, Bauer P, Khundadze M, Mirecki A, Kamel SM, Elmonem MA, Ghayoor Karimiani E, Jamshidi Y, Offiah AC, Rossor AM, Youssef-Turki IB, Hübner CA, Munot P, Reilly MM, Brown AEX, Nagy S, and Houlden H
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- Humans, Male, Female, Child, Adult, Adolescent, Young Adult, Middle Aged, Animals, Lower Extremity physiopathology, Caenorhabditis elegans, Muscle Spasticity genetics, Muscle Spasticity physiopathology, Spastic Paraplegia, Hereditary genetics, Spastic Paraplegia, Hereditary physiopathology, Mutation, Pedigree
- Abstract
Heterozygous RTN2 variants have been previously identified in a limited cohort of families affected by autosomal dominant spastic paraplegia (SPG12-OMIM:604805) with a variable age of onset. Nevertheless, the definitive validity of SPG12 remains to be confidently confirmed due to the scarcity of supporting evidence. In this study, we identified and validated seven novel or ultra-rare homozygous loss-of-function RTN2 variants in 14 individuals from seven consanguineous families with distal hereditary motor neuropathy (dHMN) using exome, genome and Sanger sequencing coupled with deep-phenotyping. All affected individuals (seven males and seven females, aged 9-50 years) exhibited weakness in the distal upper and lower limbs, lower limb spasticity and hyperreflexia, with onset in the first decade of life. Nerve conduction studies revealed axonal motor neuropathy with neurogenic changes in the electromyography. Despite a slowly progressive disease course, all patients remained ambulatory over a mean disease duration of 19.71 ± 13.70 years. Characterization of Caenorhabditis elegans RTN2 homologous loss-of-function variants demonstrated morphological and behavioural differences compared with the parental strain. Treatment of the mutant with an endoplasmic/sarcoplasmic reticulum Ca2+ reuptake inhibitor (2,5-di-tert-butylhydroquinone) rescued key phenotypic differences, suggesting a potential therapeutic benefit for RTN2-disorder. Despite RTN2 being an endoplasmic reticulum (ER)-resident membrane shaping protein, our analysis of patient fibroblast cells did not find significant alterations in ER structure or the response to ER stress. Our findings delineate a distinct form of autosomal recessive dHMN with pyramidal features associated with RTN2 deficiency. This phenotype shares similarities with SIGMAR1-related dHMN and Silver-like syndromes, providing valuable insights into the clinical spectrum and potential therapeutic strategies for RTN2-related dHMN., (© The Author(s) 2024. Published by Oxford University Press on behalf of the Guarantors of Brain.)
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- 2024
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10. Tuning the optoelectronic properties of selenophene-diketopyrrolopyrrole-based non-fullerene acceptor to obtain efficient organic solar cells through end-capped modification.
- Author
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Ijaz R, Waqas M, Mahal A, Essid M, Zghab I, Khera RA, Alotaibi HF, Al-Haideri M, Alshomrany AS, Zahid S, Alatawi NS, and Aloui Z
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- Humans, Ketones, Electrons, Osteosclerosis, Pyrroles
- Abstract
With the goal of developing a high-performance organic solar cell, nine molecules of A
2 -D-A1 -D-A2 type are originated in the current investigation. The optoelectronic properties of all the proposed compounds are examined by employing the DFT approach and the B3LYP functional with a 6-31G (d, p) basis set. By substituting the terminal moieties of reference molecule with newly proposed acceptor groups, several optoelectronic and photovoltaic characteristics of OSCs have been studied, which are improved to a significant level when compared with reference molecule, i.e., absorption properties, excitation energy, exciton binding energy, band gap, oscillator strength, electrostatic potential, light-harvesting efficiency, transition density matrix, open-circuit voltage, fill factor, density of states and interaction coefficient. All the newly developed molecules (P1-P9) have improved λmax , small band gap, high oscillator strengths, and low excitation energies compared to the reference molecule. Among all the studied compounds, P9 possesses the least binding energy (0.24 eV), P8 has high interaction coefficient (0.70842), P3 has improved electron mobility due to the least electron reorganization energy (λe = 0.009182 eV), and P5 illustrates high light-harvesting efficiency (0.7180). P8 and P9 displayed better Voc results (1.32 eV and 1.33 eV, respectively) and FF (0.9049 and 0.9055, respectively). Likewise, the phenomenon of charge transfer in the PTB7-Th/P1 blend seems to be a marvelous attempt to introduce them in organic photovoltaics. Consequently, the outcomes of these parameters demonstrate that adding new acceptors to reference molecule is substantial for the breakthrough development of organic solar cells (OSCs)., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
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11. Study of Electrical and Dielectric Behaviors of Copper-Doped Zinc Oxide Ceramic Prepared by Spark Plasma Sintering for Electronic Device Applications.
- Author
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Benamara M, Iben Nassar K, Rivero-Antúnez P, Essid M, Soreto Teixeira S, Zhao S, Serrà A, and Esquivias L
- Abstract
In this study, Cu-doped ZnO aerogel nanoparticles with a 4% copper concentration (Cu4ZO) were synthesized using a sol-gel method, followed by supercritical drying and heat treatment. The subsequent fabrication of Cu4ZO ceramics through Spark Plasma Sintering (SPS) was characterized by X-ray diffraction (XRD), field-emission gun scanning electron microscopy (FE-SEM) equipped with EDS, and impedance spectroscopy (IS) across a frequency range of 100 Hz to 1 MHz and temperatures from 270 K to 370 K. The SPS-Cu4ZO sample exhibited a hexagonal wurtzite structure with an average crystallite size of approximately 229 ± 10 nm, showcasing a compact structure with discernible pores. The EDS spectrum indicates the presence of the base elements zinc and oxygen with copper like the dopant element. Remarkably, the material displayed distinct electrical properties, featuring high activation energy values of about 0.269 ± 0.021 eV. Complex impedance spectroscopy revealed the impact of temperature on electrical relaxation phenomena, with the Nyquist plot indicating semicircular arc patterns associated with grain boundaries. As temperature increased, a noticeable reduction in the radius of these arcs occurred, coupled with a shift in their center points toward the axis center, suggesting a non-Debye-type relaxation mechanism. Dielectric analyses revealed a temperature-driven evolution of losses, emphasizing the material's conductivity impact. Non-Debye-type behavior, linked to ion diffusion, sheds light on charge storage dynamics. These insights advance potential applications in electronic devices and energy storage.
- Published
- 2024
- Full Text
- View/download PDF
12. A DFT study for improving the photovoltaic performance of organic solar cells by designing symmetric non-fullerene acceptors by quantum chemical modification on pre-existed LC81 molecule.
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Zahoor A, Sadiq S, Khera RA, Essid M, Aloui Z, Alatawi NS, Ibrahim MAA, Hasanin THA, and Waqas M
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- Humans, Chlorhexidine, Osteosclerosis
- Abstract
Minimizing the energy loss and improving the open circuit voltage of organic solar cells is still a primary concern for scientists working in this field. With the aim to enhance the photovoltaic performance of organic solar cells by minimizing energy loss and improving open circuit voltage, seven new acceptor molecules (LC1-LC7) are presented in this work. These molecules are designed by modifying the terminal acceptors of pre-existed "LC81" molecule based on an indacinodithiophene (IDT) fused core. The end-group modification approach is very fruitful in ameliorating the efficacy and optoelectric behavior of OSCs. The newly developed molecules presented remarkable improvements in performance-related parameters and optoelectronic properties. Among all designed molecules, LC7 exhibited the highest absorption maxima (λ
max = 869 nm) with the lowest band-gap (1.79 eV), lowest excitation energy (Ex = 1.42 eV), lowest binding energy, and highest excited state lifetime (0.41 ns). The newly designed molecules LC2, LC3, and LC4 exhibited remarkably improved Voc that was 1.84 eV, 1.82 eV, and 1.79 eV accordingly, compared to the LC81 molecule with Voc of 1.74 eV LC2 molecule showed significant improvement in fill factor compared to the previously presented LC81 molecule. LC2, LC6, and LC7 showed a remarkable reduction in energy loss by showing Eloss values of 0.26 eV, 0.18 eV, and 0.25 eV than LC81 molecule (0.37 eV). These findings validate the supremacy of these developed molecules (especially LC2) as potential components of future OSCs., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Inc. All rights reserved.)- Published
- 2023
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13. Exploring the Electronic, Optical, and Charge Transfer Properties of A-D-A-Type IDTV-ThIC-Based Molecules To Enhance Photovoltaic Performance of Organic Solar Cells.
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Majeed M, Waqas M, Aloui Z, Essid M, Ibrahim MAA, Khera RA, Shaban M, and Ans M
- Abstract
Improving the charge mobility and optoelectronic properties of indacenodithiophene - based small molecule acceptors is a key challenge to improving overall efficiency. In this current research, seven newly designed molecules ( DT1-DT7 ) comprising the indacenodithiophene - based core are presented to tune energy levels, enhance charge mobility, and improve the photovoltaic performance of IDTV-ThIC molecules via density functional theory. All the molecules were designed by end-capped modification by substituting terminal acceptors of IDTV-ThIC with strong electron-withdrawing moieties. Among all the examined structures, DT1 has proved itself a superior molecule in multiple aspects, including higher λ
max in chloroform (787 nm) and gaseous phase (727 nm), narrow band gap (2.16 eV), higher electron affinity (3.31 eV), least excitation energy (1.57 eV), and improved charge mobility due to low reorganization energy and higher excited state lifetime (2.37 ns) when compared to the reference (IDTV-ThIC) and other molecules. DT5 also showed remarkable improvement in different parameters, such as the lowest exciton binding energy (0.41 eV), leading to easier charge moveability. The improved open-circuit voltage of DT4 and DT5 makes them proficient molecules exhibiting the charge transfer phenomenon. The enlightened outcomes of these molecules can pave a new route to develop efficient organic solar cell devices using these molecules, especially DT1 , DT4 , and DT5 ., Competing Interests: The authors declare no competing financial interest., (© 2023 The Authors. Published by American Chemical Society.)- Published
- 2023
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14. High-Efficiency and Low-Energy-Loss Organic Solar Cells Enabled by Tuning the End Group Modification of the Terthiophene-Based Acceptor Molecules to Enhance Photovoltaic Properties.
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Rehman FU, Hameed S, Khera RA, Shaban M, Essid M, Aloui Z, Al-Saeedi SI, Ibrahim MAA, and Waqas M
- Abstract
In the current study, six nonfullerene small acceptor molecules were designed by end-group modification of terminal acceptors. Density functional theory calculations of all designed molecules were performed, and optoelectronic properties were computed by employing different functionals. Every constructed molecule has a significant bathochromic shift in the maximum absorption value (λ
max ) except AM6 . AM1 - AM4 molecules represented a narrow band gap ( Eg ) and low excitation energy values. The AM1 - AM4 and AM6 molecules have higher electron mobility. Comparing AM2 to the reference molecule reveals that AM2 has higher hole mobilities. Compared to the reference molecule, all compounds have excellent light harvesting efficiency values compared to AM1 and AM2 . The natural transition orbital investigation showed that AM5 and AM6 had significant electronic transitions. The open-circuit voltage ( Voc ) values of the computed molecules were calculated by combining the designed acceptor molecules with PTB7-Th. In light of the findings, it is concluded that the designed molecules can be further developed for organic solar cells (OSCs) with superior photovoltaic abilities., Competing Interests: The authors declare no competing financial interest., (© 2023 The Authors. Published by American Chemical Society.)- Published
- 2023
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15. Enhanced detection of low concentration volatile organic compounds using advanced doped zinc oxide sensors.
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Benamara M, Ly A, Soltani S, Essid M, Dahman H, Dhahri R, El Mir L, Debliquy M, and Lahem D
- Abstract
Pure zinc oxide nanoparticles, as well as those doped with 3% calcium, aluminum, and gallium, were synthesized using a sol-gel method and then deposited onto an alumina substrate for sensing tests. The resulting nanoparticles were characterized using a variety of techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), UV-VIS-NIR absorption spectroscopy, and photoluminescence (PL) measurements, to examine their structural, morphological, and optical properties. The prepared nanoparticles were found to have the hexagonal wurtzite structure of ZnO with a P 63 mC space group. The UV-Vis-IR spectra showed that the samples are highly absorbent in the UV range, while the PL spectra confirmed the presence of many defects in the ZnO structure, such as oxygen vacancies and zinc interstitials. The doped samples exhibited more defects than the pure sample. SEM images of the deposited film surface showed agglomerates with a spherical shape and confirmed the nanometer scale size of our prepared samples, as corroborated by the TEM images. The EDX spectra indicated the high purity of the ZnO deposited films, with a high presence of Zn and O and the presence of the doped elements (Ca, Al, and Ga) in each doped sample. Sensing tests were performed on ZnO, Ca
3% -doped ZnO (C3ZO), Al3% -doped ZnO (A3ZO), and Ga3% -doped ZnO (G3ZO) sensors in the presence of volatile organic compounds (VOCs) gases such as ethanol, formaldehyde, methanol, and acetone at low concentrations. The sensors exhibited high responses to low ppm level concentrations of the VOCs gases. At a low operational temperature of 250 °C, the C3ZO sensor had the highest response to 5 ppm of ethanol, methanol, and formaldehyde gases compared to the pure and other doped sensors. Additionally, the A3ZO sensor exhibited the highest response to acetone gas. In conclusion, our findings suggest that the doping of zinc oxide can enhance the low concentration detection of VOCs gases, with the C3ZO and A3ZO sensors showing the highest response to specific gases., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (This journal is © The Royal Society of Chemistry.)- Published
- 2023
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16. Synergistic modification of end groups in Quinoxaline fused core-based acceptor molecule to enhance its photovoltaic characteristics for superior organic solar cells.
- Author
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Sadiq S, Waqas M, Zahoor A, Mehmood RF, Essid M, Aloui Z, Khera RA, and Akram SJ
- Subjects
- Prospective Studies, Quinoxalines
- Abstract
The competence of organic solar cells (OSCs) could be enhanced by improving the light absorption capabilities as well as the open-circuit voltage (V
oc ) of utilized molecules. To upgrade overall functionality of OSCs, seven new molecules were designed in this work using an end-cap alteration technique on Quinoxaline fused core-based non-fullerene acceptor (Qx-2) molecule. This technique is known to be quite advantageous in terms of improvement of the effectiveness and optoelectrical behavior of various OSCs. Critical parameters like the absorption maximum, frontier molecular orbitals, excitation energy, exciton binding energy, Voc , and fill factor of molecules were considered for the molecules thus designed. All newly designed molecules showed outstanding improvement in optoelectronic as well as performance-related properties. Out of all scrutinized molecules, Q1 exhibited highest wavelength of absorption peak (λmax = 779 nm) with the reduced band gap (1.90 eV), least excitation energy (Ex = 1.59 eV), along with the highest dipole moment (17.982950 D). Additionally, the newly designed compounds Q4, Q5, and Q6 exhibited significantly improved Voc s that were 1.55, 1.47, and 1.50 eV accordingly, as compared to the 1.37 eV of Qx-2 molecule. These molecules also showed remarkable improvement in fill factor attributed to direct correspondence of Voc with it. Inclusively, these results support the superiority of these newly developed molecules as prospective constituents of upgraded OSCs., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Inc. All rights reserved.)- Published
- 2023
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17. Magnetocaloric effect and critical behavior of the La 0.75 Ca 0.1 Na 0.15 MnO 3 compound.
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Bouzidi S, Hsini M, Soltani S, Essid M, Albedah MA, Belmabrouk H, and Dhahri J
- Abstract
In this paper, we have studied the critical behavior and the magnetocaloric effect (MCE) simulation for the La
0.75 Ca0.1 Na0.15 MnO3 (LCNMO) compound at the second order ferromagnetic-paramagnetic phase transition. The optimized critical exponents, based on the Kouvel-Fisher method, were found to be: β = 0.48 and γ = 1. These obtained values supposed that the Mean Field Model (MFM) is the proper model to analyze adequately the MCE in the LCNMO sample. The isothermal magnetization M ( H , T ) and the magnetic entropy change -Δ SM ( H , T ) curves were successfully simulated using three models, namely the Arrott-Noakes equation (ANE) of state, Landau theory, and MFM. The framework of the MFM allows us to estimate magnetic entropy variation in a wide temperature range within the thermodynamics of the model and without using the usual numerical integration of Maxwell relation., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)- Published
- 2023
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18. Theoretical framework for achieving high V oc in non-fused non-fullerene terthiophene-based end-capped modified derivatives for potential applications in organic photovoltaics.
- Author
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Waqas M, Hadia NMA, Shawky AM, Mahmood RF, Essid M, Aloui Z, Alatawi NS, Iqbal J, and Khera RA
- Abstract
Non-fused ring-based OSCs are an excellent choice, which is attributed to their low cost and flexibility in applications. However, developing efficient and stable non-fused ring-based OSCs is still a big challenge. In this work, with the intent to increase V
oc for enhanced performance, seven new molecules derived from a pre-existing A-D-A type A3T-5 molecule are proposed. Different important optical, electronic and efficiency-related attributes of molecules are studied using the DFT approach. It is discovered that newly devised molecules possess the optimum features required to construct proficient OSCs. They possess a small band gap ranging from 2.22-2.29 eV and planar geometries. Six of seven newly proposed molecules have less excitation energy, a higher absorption coefficient and higher dipole moment than A3T-5 in both gaseous and solvent phases. The A3T-7 molecule exhibited the maximum improvement in optoelectronic properties showing the highest λmax at 697 nm and the lowest Ex of 1.77 eV. The proposed molecules have lower ionization potential values, reorganization energies of electrons and interaction coefficients than the A3T-5 molecule. The Voc of six newly developed molecules is higher ( Voc ranging from 1.46-1.72 eV) than that of A3T-5 ( Voc = 1.55 eV). Similarly, almost all the proposed molecules except W6 exhibited improvement in fill factor compared to the A3T-5 reference. This remarkable improvement in efficiency-associated parameters ( Voc and FF) proves that these molecules can be successfully used as an advanced version of terthiophene-based OSCs in the future., Competing Interests: The Authors declare no conflict of interest., (This journal is © The Royal Society of Chemistry.)- Published
- 2023
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19. Quantum modeling of dimethoxyl-indaceno dithiophene based acceptors for the development of semiconducting acceptors with outstanding photovoltaic potential.
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Rashid EU, Hadia NMA, Shawky AM, Ijaz N, Essid M, Iqbal J, Alatawi NS, Ans M, and Khera RA
- Abstract
In the current DFT study, seven dimethoxyl-indaceno dithiophene based semiconducting acceptor molecules (ID1-ID7) are designed computationally by modifying the parent molecule (IDR). Here, based on a DFT exploration at a carefully selected level of theory, we have compiled a list of the optoelectronic properties of ID1-ID7 and IDR. In light of these results, all newly designed molecules, except ID5 have shown a bathochromic shift in their highest absorbance ( λ
max ). ID1-ID4, ID6 and ID7 molecules have smaller band gap ( Egap ) and excitation energy ( Ex ). IP of ID5 is the smallest and EA of ID1 is the largest among all others. Compared to the parent molecule, ID1-ID3 have increased electron mobility, with ID1 being the most improved in hole mobility. ID4 had the best light harvesting efficiency in this investigation, due to its strongest oscillator. The acceptor molecules' open-circuit voltages ( VOC ) were computed after being linked to the PTB7-Th donor molecule. Fill factor (FF) and normalized VOC of ID1-ID7 were calculated and compared to the parent molecule. Based on the outcomes of this study, the modified acceptors may be further scrutinised for empirical usage in the production of organic solar cells with enhanced photovoltaic capabilities., Competing Interests: The authors declare no conflict of interest., (This journal is © The Royal Society of Chemistry.)- Published
- 2023
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20. Is YouTube™ a reliable source for patient information about Holmium Laser Enucleation of Prostate?
- Author
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Mokadem S, Fortier A, Gharbi M, Essid MA, Aublé A, Defortescu G, Pfister C, Sibert L, and Cornu JN
- Subjects
- Humans, Male, Prostate, Video Recording, Laser Therapy, Lasers, Solid-State therapeutic use, Prostatic Hyperplasia surgery, Social Media
- Abstract
Objectives: Prior to benign prostate surgery, the patient's informed consent is mandatory. Among the multiple source of information for patients, social networks are very popular, but the quality of information delivered is unknown. The aim of this study was to evaluate the quality of the information freely available for patients on YouTube™ regarding HoLEP., Materials and Methods: The term "HOLEP" was searched on YouTube™ on December 24, 2020. Videos that were not in English, French or Arabic, specifically destined to the medical community, with no written or oral comment, patient testimonials, pure surgical technique or had content unrelated to HoLEP were excluded from the study. The patient information sheet by the French Urology Association (AFU) was used to create a list of 31 items classified into 4 categories as follows: anatomy and pathophysiology (6 items), technique and perioperative preparation (10 items), usual outcomes (10 items) and complications (5 items). For each item on the predefined list, correct, missing and incorrect information were rated respectively 1, 0 and -1., Results: Thirty-five videos met the inclusion criteria. Their average length was 6'06"±7'03" [00'20"; 31'30"], with an average number of views of 5279±17,821 [8; 87,354]. The information provided on the videos was written and oral, oral-only and written-only in 51%, 34% and 14% of cases, respectively. 23% of the videos showed surgery sequences, 40% animations and 62% a doctor speaking. Only one video had a quality score greater than 80% and 7 videos got a score below 20%., Conclusion: The information about HoLEP on YouTube™ seemed not of sufficiently high quality to allow patients to make informed decisions, and was occasionally misleading. Surgeons still have the duty to give the best quality information, and may point patients towards adequate sources of information, especially those delivered by national and international professional societies., (Copyright © 2022 Elsevier Masson SAS. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
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