Article
Chemistry, Physical
Prerna Chauhan, Ranim Mohamad
Summary: This study successfully increased the nitrogen content in vapor phase by adjusting the partial pressure of ammonia, and investigated the effect of ammonia on the composition of indium-rich InAl(Ga)N layers. It was found that the increase in indium molar fraction coincided with the ammonia input partial pressure, independent of the growth regimes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Multidisciplinary
S. Sakiroglu, H. Sari
Summary: The influence of internuclear distance and quantum dot size on the nonlinear optical rectification of a hydrogen molecular ion D-2(+) in a two-dimensional quantum dot was calculated. Solutions of the resulting eigenvalue equation were obtained using the two-dimensional diagonalization method within the effective mass approximation framework. It was found that increasing the distance between nuclei resulted in a significant increase in the peak value of the nonlinear optical rectification of the D-2(+) complex, which displayed a double-peak structure. Moreover, larger nonlinear optical rectification amplitudes were observed in large-sized quantum dots and in highly asymmetric systems. It was also demonstrated that adjusting the internuclear distance could lead to redshift or blueshift at the peak position of the nonlinear optical rectification of the molecular complex.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Multidisciplinary Sciences
Qi-Long Qin, Zhi-Bin Wang, Hai-Nan Su, Xiu-Lan Chen, Jie Miao, Xiu-Juan Wang, Chun-Yang Li, Xi-Ying Zhang, Ping-Yi Li, Min Wang, Jiasong Fang, Ian Lidbury, Weipeng Zhang, Xiao-Hua Zhang, Gui-Peng Yang, Yin Chen, Yu-Zhong Zhang
Summary: Researchers have found that a piezotolerant bacterium has a two-step metabolic pathway to adapt to high hydrostatic pressure by utilizing trimethylamine, which improves growth and survival rates under such conditions.
Article
Materials Science, Multidisciplinary
A. Fakkahi, A. Sali, M. Jaouane, R. Arraoui
Summary: In this study, the binding energy of an on-center shallow donor impurity in a GaAs/Ga1-xAlxAs multilayered spherical quantum dot was investigated using the Finite Element Method (FEM). The results show a strong dependence of the binding energy on the width of the structure layers, as well as significant effects of pressure, temperature, and electric field on the binding energy.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Applied
Qin Li, Aixin Guo, Lei Rao, Liang Zhao, Yongtao Wang, Xiaojun Liao
Summary: This study found that high hydrostatic pressure can regulate the interactions between native starches and anthocyanins by altering spatial structures, leading to improved binding efficiency.
Article
Physics, Multidisciplinary
A. Fakkahi, H. Dakhlaoui, A. Sali, M. Jaouane, R. Arraoui, K. El-bakkari, A. Ed-Dahmouny
Summary: In this paper, the photoionization cross section (PCS) and the binding energy of a hydrogenic shallow donor impurity confined in multilayered spherical quantum dot under the effects of temperature, pressure, and electric field were studied using the effective mass approximation and finite element method. The numerical results show that the binding energy increases with increasing pressure, while the position of the PCS peak shifts to higher energies with increasing pressure, temperature, and electric field.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Condensed Matter
E. Cicek, A. Mese, B. Ozkapi, I Erdogan
Summary: This study investigates the self-polarization and binding energy of donor impurity atom in Ga1_xAlxAs/GaAs quantum well under the combined influence of hydrostatic pressure and temperature. The results show that hydrostatic pressure and temperature significantly affect the calculated self-polarization and binding energy in the quantum well.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
K. El-Bakkari, M. Jaouane, A. Fakkahi, A. Ed-Dahmouny, R. Arraoui, H. Azmi, A. Sali, F. Ungan
Summary: This study uses the finite element method to investigate the behavior of impurities in multilayer cylindrical quantum dots (MLCQDs) based on the effective-mass approximation. The effects of hydrostatic pressure on the electronic properties, binding energy, and diamagnetic susceptibility of impurities in MLCQDs are numerically analyzed. The results show that the binding energies decrease with the radius and have three maximum values corresponding to the number of quantum dot layer materials. The diamagnetic susceptibility is strongly influenced by the hydrostatic pressure, impurity location, and radius.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Optics
Huijuan Zhang, Jing Zhang, Duo Fu, Jiang Peng, Jiakun Bai, Junhui Jia
Summary: Two new AIE-active triphenylamine-based aza-N,O-chelated boron difluoride dyes, TPA-H and TPA-Cl, were designed and synthesized, showing reversible mechanochromism and piezochromism under mechanical stimulus and hydrostatic pressure. TPA-Cl with a chlorine atom exhibited a more sensitive and pronounced mechanochromic and piezochromic response. Various analytical techniques were applied to further investigate their mechanochromism and piezochromism under different conditions.
JOURNAL OF LUMINESCENCE
(2022)
Article
Physics, Applied
Feng Qi Zhao, Zi Zheng Guo, Bo Zhao
Summary: The study investigates the impact of hydrostatic pressure on the binding energy and polaron effect of the bound polaron in a wurtzite AlyGa1-yN/AlxGa1-xN parabolic quantum well, revealing that pressure has a significant effect on the binding energy and polaron effect.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2021)
Article
Polymer Science
Tamer Ali Sebeay, Azzam Ahmed
Summary: In this study, glass-fiber-reinforced plastic composite pipes with various fiber angles, wall thicknesses, and lengths were subjected to hydrostatic pressure to analyze their pressure capacity, stress, and deformation. The results showed that composite pipes with a fiber angle of ±55 degrees and larger wall thickness had higher pressure capacity.
Article
Biotechnology & Applied Microbiology
Angeliki Marietou, Jennie Spicker Schmidt, Martin R. Rasmussen, Alberto Scoma, Soren Rysgaard, Leendert Vergeynst
Summary: There is a renewed interest in hydrocarbon biodegradation in Arctic seawaters due to increasing ship traffic and risk for oil spills. This study found that oil-degrading bacteria in the Arctic waters are tolerant to mild hydrostatic pressures, but their activity can be affected at higher pressures.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Physics, Multidisciplinary
H. Sari, E. B. Al, E. Kasapoglu, S. Sakiroglu, I Sokmen, M. Toro-Escobar, C. A. Duque
Summary: By using the two-dimensional diagonalization method and the effective mass approximation, this study investigates the electronic structure and intersubband optical absorption of a singly ionized double donor complex confined in a Gaussian quantum dot. The results show that the binding energy, dissociation energy, equilibrium distance, and amplitude of the optical absorption are significantly affected by the quantum dot size and internuclear distance. Furthermore, it is observed that an increase in the amplitude of the dipole-related matrix element and energy difference between the two lowest-lying energy states occurs when the distance between the donor atoms is in the order of the quantum dot size. Thus, the electronic and optical properties can be precisely controlled by adjusting the system's size and internuclear distance.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Nanoscience & Nanotechnology
Zuoyong Zhang, Chuang Deng
Summary: In this study, atomistic simulations are used to investigate the effects of hydrostatic pressure on the grain boundary segregation energy spectra in binary alloy systems. The results show that hydrostatic pressure can either enhance or hinder grain boundary segregation tendencies, depending on the alloy system. In certain alloys, such as AlMg and NiNb, hydrostatic pressure can also lead to transitions in the preferred segregation sites, characterized by an initial increase followed by a decrease at certain pressures. These transitions can be attributed to the changes in the elastic component brought about by hydrostatic pressure, which dominate the total segregation energy.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Applied
Xue Liu, Yuyang Ma, Li Liu, Mingyong Zeng
Summary: This study investigated the effects of high hydrostatic pressure (HHP) on the conformation and IgG binding capacity of tropomyosin (TM) from Pacific oysters. The results showed that HHP treatment caused conformational changes in TM, leading to a reduction in its IgG binding capacity. These findings suggest that HHP may be a promising technology for producing hypoallergenic oyster products.
Article
Materials Science, Multidisciplinary
Mohammed Tihtih, Jamal Eldin F. M. Ibrahim, Mohamed A. Basyooni, Walid Belaid, Laszlo A. Gomze, Istvan Kocserha
Summary: This study investigates the structural, electronic, and optical properties of lead-free Barium titanate (BT) ferroelectric material in its tetragonal structure. Experimental and theoretical approaches are used to determine the bandgap energy and structural parameters of BT. The results show that BT ceramic has a tetragonal structure without impurity phases. The calculated bandgap energy is higher than the experimental value, and the lattice constants are closer to the experimental values when using the PBEsol functional.
MATERIALS TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Mohammed Tihtih, Jamal Eldin F. M. Ibrahim, Mohamed A. Basyooni, Emese Kurovics, Walid Belaid, Irina Hussainova, Istvan Kocserha
Summary: Strontium and Yttrium-doped BaTiO3 ceramics were synthesized using the sol-gel method. The results showed that Sr and Y elements strongly influenced the densification, grain size, optical behavior, and thermal conductivity of the ceramics.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Mohammed Tihtih, Jamal Eldin F. M. Ibrahim, Mohamed A. Basyooni, Redouane En-nadir, Walid Belaid, Mohamed M. Abdelfattah, Irina Hussainova, Gabor Pszota, Istvan Kocserha
Summary: A homogeneous fine powder of barium titanate (BaTiO3) doped with different concentrations of strontium (x = 0, 0.05, 0.125, 0.15, 0.20, and 0.3) was prepared and analyzed. The addition of strontium resulted in changes in the physical properties of BaTiO3, including apparent porosity, bulk density, linear shrinkage, and water absorption. It was found that the optical band gap decreased significantly with increasing Sr concentration, while the thermal conductivity increased with Sr doping and higher temperatures. The correlated behavior of band gap energy, absorption, and thermal conductivity can be utilized for thermo-optical applications.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Redouane En-nadir, Haddou El-ghazi, Walid Belaid, Mohammed Tihtih, Hassan Abboudi, Ibrahim Maouhoubi, Anouar Jorio, Izeddine Zorkani
Summary: This study presents a numerical simulation of optical absorption in single, double, and triple quantum wells (QWs) considering the effects of composition, temperature, and QW number. The results reveal that the optical absorption strongly depends on the geometry, composition, and temperature of the nanostructures. It was found that the optical absorption is greater and more sensitive to composition and temperature variations in single QWs compared to double and triple QWs. A red-shift (blue-shift) and enhancement (fall) of the resonance peaks in the optical absorption spectrum were observed under composition, temperature, and QW number variations. However, adding a QW causes a significant decrease in optical absorption in double and multiple QWs due to high loss rate from oblique tunnelling and non-radiative transitions.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Physics, Condensed Matter
Redouane En-nadir, Haddou El Ghazi, Mohammed Tihtih, Shrouk E. Zaki, Walid Belaid, Ibrahim Maouhoubi, Izeddine Zorkani
Summary: This paper investigates the influence of electric field, confinement parabolicity, compositions, and structure parameters on the electronic properties of hydrogenic donor impurities within a modified boolean AND-shaped potential. It demonstrates the significant impact of these factors on electron probability, impurity polarizability, diamagnetic susceptibility, and ionization energy, with the ability to fine-tune these properties through parameter adjustments. These findings hold implications for the advancement of III-nitride-based optoelectronic devices.
EUROPEAN PHYSICAL JOURNAL B
(2023)
Article
Engineering, Electrical & Electronic
Redouane En-nadir, Haddou El-ghazi, Mohammed Tihtih, Walid Belaid, Shrouk E. E. Zaki, Ibrahim Maouhoubi, Izeddine Zorkani
Summary: This article delves into the topic of quantum wells and explores the effects of external electric fields, impurity location, and system's dimensions on the binding energy of shallow donor impurities. Through a theoretical analysis using the Schrodinger equation, the study provides new insights into this complex field. The findings show that the binding energy of impurities is influenced by factors such as electric fields, compositions, well/barrier sizes, and impurity location. Thick-layered quantum wells are particularly sensitive to external electric fields, and central positions result in the highest binding energy. On the other hand, increasing quantum well thickness and In-content lead to decreases in binding energy. Interestingly, single-quantum wells exhibit lower binding energies than double and triple-quantum wells, making this study a valuable contribution to the field of tunable and multiple-quantum well-based optoelectronic devices.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Mohamed A. Basyooni, Amina Houimi, Mohammed Tihtih, Shrouk E. Zaki, Issam Boukhoubza, Walid Belaid, Redouane En-nadir, Jamal Eldin F. M. Ibrahim, G. F. Attia
Summary: Photonic crystal (PhC) is studied as a potential improvement for Cu2ZnSnS4 solar cells by acting as a back reflector with minimal light transmission through the absorption active zone. The thickness of the PhC layers significantly affects the width of the photonic bandgap, with increased thickness of VO2 shifting the bandgap to higher wavelengths. SCAPS model simulations of two different configurations, Monoclinic (M) VO2/TiO2 and Tetragonal (T) VO2/TiO2, show that the (M VO2/TiO2) configuration enhances device efficiency from 11.02% to 12.79%, while the (T VO2/TiO2) reaches 16.88%. The study concludes that the PhC layers enhance light-matter coupling and photonic coupling, resulting in improved device performance.
Article
Physics, Multidisciplinary
Walid Belaid, Haddou El Ghazi, Shrouk E. Zaki, Mohamed A. Basyooni, Mohammed Tihtih, Redouane Ennadir, Hamdi Sukur Kilic, Izeddine Zorkani, Anouar Jorio
Summary: The aim of this research is to analyze the influence of various factors on the photo-ionization cross-section in (Al, Ga)N/AlN double triangular quantum wells using the finite difference method. The results show that the PICS is highly dependent on the electric field, hydrostatic pressure, temperature, and Ga concentration. The optical spectra exhibit blue-shift with increasing electric field and pressure, and red-shift with increasing temperature and impurity displacement.
Article
Chemistry, Multidisciplinary
Mohammed Tihtih, Jamal Eldin F. M. Ibrahim, Mohamed A. Basyooni, Redouane En-nadir, Walid Belaid, Irina Hussainova, Istvan Kocserha
Summary: This study synthesized yttrium-substituted barium titanate (BYT) using a sol-gel process and found that the tetragonal phase became less pronounced as the yttrium content increased. The BYT ceramic with 30% yttrium had the narrowest band gap and exhibited high thermal conductivity and low electrical conductivity. The current-voltage characteristics of the BYT MLCC showed potential use in high-capacity MLCCs.
Article
Materials Science, Multidisciplinary
Issam Boukhoubza, Issam Derkaoui, Mohamed A. Basyooni, Mohamed Achehboune, Mohammed Khenfouch, Walid Belaid, Monica Enculescu, Elena Matei
Summary: We have developed a novel nanocomposite material based on reduced graphene oxide (RGO)-functionalized zinc oxide (ZnO) nanorods, which holds great promise for application in white light emitting diodes (LEDs) and UV photodetection. The nanorods had a pristine hexagonal wurtzite structure, and SEM images showed sandwich-like nanocomposites with ZnO nanorods coated in reduced graphene oxide. Raman measurements confirmed the hybridization and interactions between the layers. The resulting nanocomposites exhibited a lower band gap energy than ZnO and displayed unique photoluminescence spectra with white light emission. The photodetector based on RGO/ZnO/RGO sandwich structures demonstrated exceptional photoresponse under UV illumination, making it highly promising for various optoelectronic applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Physics, Condensed Matter
Redouane En-nadir, Haddou El-ghazi, Liviu Leontie, Mohammed Tihtih, Shrouk E. Zaki, Walid Belaid, Aurelian Carlescu, Izeddine Zorkani
Summary: This paper comprehensively examines the electronic and optical responses of an InGaN-based quantum well with a variable inverted parabolic confinement potential. The effects of vertical electric fields, indium content, confinement shapes, and sizes are investigated. The results show that these factors significantly influence the electrical and optical properties of the system. By carefully selecting these factors, the optical absorption coefficient, refractive index, and optical susceptibility of the system can be precisely controlled. This study contributes to the understanding of electromagnetic radiation-matter interactions and has practical applications in the design of III-nitride materials used in various devices.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Redouane En-nadir, Mohamed A. Basyooni-M. Kabatas, Mohammed Tihtih, Walid Belaid, Ilyass Ez-zejjari, El Ghmari Majda, Haddou El Ghazi, Ahmed Sali, Izeddine Zorkani
Summary: This study focuses on the theoretical investigation of radiative recombination lifetimes in ultra-thin quantum wells, specifically in InGaN/GaN quantum wells. The research reveals that the radiative lifetimes in intra-subband and band-to-band transitions are significantly affected by external excitation. The thickness of the quantum well layer exerts a substantial influence on the radiative lifetime, while the presence of impurities has a minor impact. This research advances our understanding of transition lifetimes in quantum well systems, promising enhancements in optoelectronic applications.
Article
Physics, Condensed Matter
Mohamed A. Basyooni, Mohamed Achehboune, Issam Boukhoubza, A. E. H. Gaballah, Mohammed Tihtih, Walid Belaid, Redouane En-nadir, Issam Derkaoui, Ahmed M. Abdelbar, Shrouk E. Zaki, Sule Ates, Yasin Ramazan Eker
Summary: This study investigated the optoelectronic properties of molybdenum trioxide thin films using atomic layer deposition technique and theoretical calculations. The band gap calculations were refined using Hubbard U corrections, resulting in a more accurate value. The electronic parameters of the photodetector were analyzed using thermionic emission theory. The results showed that the sample deposited with 100 pulses exhibited better performance under UV illumination.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Physics, Condensed Matter
Shivani Gohri, Jaya Madan, Rahul Pandey
Summary: This study improves the efficiency of SnS-based solar cells by implementing the glancing angle deposition approach and introducing a CZTSSe layer. The findings offer valuable insights for enhancing the design of SnS-based solar cells and making them more efficient.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Mahboubeh Yeganeh, Davoud Vahedi Fakhrabad
Summary: The lattice thermal conductivity of CdO monolayer was investigated, and it was found to be lower than that of bulk CdO due to the lower phonon lifetime and phonon group velocity. As a result, the monolayer exhibits higher thermoelectric efficiency compared to the bulk counterpart.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Shivam Srivastava, Prachi Singh, Anjani K. Pandey, Chandra K. Dixit
Summary: In this research paper, a novel equation of state (EOS) based on finite strain theories is proposed for predicting the thermo elastic properties of various materials. Extensive analysis and comparison with existing models and experimental data demonstrate the validity and effectiveness of the proposed EOS in capturing the unique thermodynamic behavior of nanomaterials, bulk metallic glasses, and superconductors. This research is of great importance in the fields of materials science, nanotechnology, and condensed matter physics.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Subrata Das, Sanjoy Kr Mahatha, Konstantin Glazyrin, R. Ganesan, Suja Elizabeth, Tirthankar Chakraborty
Summary: In this study, we investigated the structural evolution of Tb2Ti2O7 under external pressure and temperature, and confirmed the occurrence of an isostructural phase transition beyond 10 GPa pressure. This transition leads to changes in lattice parameters and mechanical properties, which can be understood in terms of localized rearrangement of atoms.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Hamze Mousavi
Summary: It has been found that undoped graphene sheet has zero states at the Fermi energy level, making it difficult for Cooper pairing to occur in the superconductive state. However, T-graphene, with physical properties similar to graphene, exhibits metallic behavior and has available electron states near the Fermi level. The gap equation for the s-wave superconductive state is derived based on the attractive Hubbard model and the Bogoliubov de Gennes equation for this two-dimensional metallic system. It is found that a nonzero critical temperature, τ, exists for different levels of electron-electron interaction, ǫ. τ has higher values when the system has electronic half band-filling, but decreases when the system does not have half band-filling. However, τ vanishes when ǫ becomes small enough near the band edges.
SOLID STATE COMMUNICATIONS
(2024)