Article
Physics, Multidisciplinary
Ali B. Abou Hammad, A. M. Mansour, Amany M. El Nahrawy
Summary: Nano-structure ferromagnetic-ferroelectric composite materials prepared by the sol-gel method, such as Potassium Barium titanate doped with Ni2+ nanoparticles, exhibit enhanced thermal stability and optical bandgap. The incorporation of Ni2+ nanoparticles can alter the structural and band structures interactions, leading to efficient charge carrier transfer.
Article
Environmental Sciences
Umesh Chejara, Anamika Prajapati, Arvind Kumar
Summary: This study synthesized and characterized nano-particles of polycrystalline magnesium and iron ferrite doped with rare earth materials. The electrical properties of these materials were measured, and it was found that they exhibit variation behavior with respect to frequency. The study suggests that these materials may have potential applications in the fabrication of microwave antennas to reduce energy losses.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Physics, Multidisciplinary
M. Akbari, A. Heidaryan, H. Shokrollahi, O. Mirzaee
Summary: Co-doped barium titanate (BT) piezoceramics were synthesized using the sol-gel-assisted solid state co-doping technique and microwave and conventional heating. The microwave-sintered samples showed higher purity, smaller grain size, and better tetragonality compared to conventionally sintered furnace samples. The microwave sintering method also resulted in higher piezoelectric constants and dielectric constants compared to conventional sintering.
Article
Materials Science, Multidisciplinary
Mohammad Hayath Rajvee, S. V. Jagadeesh Chandra, B. Eswara Rao, Y. S. V. Raman, P. Rajesh Kumar
Summary: In this study, ZrTiO2 dielectric thin films were successfully deposited on p-Si(100) substrate using sol-gel spin coating technique. The rotational speed was found to significantly influence the structural, optical, and dielectric properties of the TZO films. After annealing, the packaging density and surface roughness of the TZO films were observed to increase, along with an increase in physical thickness, refractive index, and dielectric constant. Furthermore, the interface quality at TZO/Si stacks was notably improved in annealed TZO devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Textiles
Yaya Zhang, Jiyong Hu, Xiong Yan, Huating Tu
Summary: The thickness and dielectric properties of fabric substrate are crucial in the design of wearable antennas, with a thicker substrate with low dielectric constant and high loss tangent enhancing antenna bandwidth. Sewing multiple fabrics together can increase thickness while maintaining flexibility, but controlling dielectric properties is challenging due to the lack of relationship between materials. A proposed circuit model was used to establish equivalent capacitance and resistance models for sewed multilayer fabric to predict its loss tangent, showing good agreement with experimental results and providing a basis for multilayer flexible electronic substrate design.
TEXTILE RESEARCH JOURNAL
(2022)
Article
Materials Science, Ceramics
Sachin Kumar, Vaibhav Shrivastava, O. P. Thakur, Vandna Luthra
Summary: The present study discusses the synthesis of yttrium and tin-doped barium titanate using the sol-gel synthesis route and investigates their structural, morphological, and ferroelectric properties. XRD and Raman spectroscopy were used to analyze the phase and lattice vibrations of the samples. SEM micrographs revealed that tin-doping increased the grain size, while yttrium incorporation inhibited grain growth. The DC conductivity, ferroelectric properties, and piezoelectric coefficient of the samples were also studied.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
M. D. Hossain, A. Masud, M. N. I. Khan, S. S. Sikder
Summary: Nanostructured Bi0.9Eu0.1FeO3 (BEFO), Ni0.6Zn0.4Fe2O4 (NZF), and (1-x).BEFO + x.NZF composites have been synthesized and characterized. The addition of NZF content in the composites modified their magnetic and dielectric properties. The optimized 0.9 BEFO + 0.1 NZF composite showed the highest permeability and dielectric values with the least amount of losses.
CERAMICS INTERNATIONAL
(2023)
Article
Biochemistry & Molecular Biology
Nico Zamperlin, Andrea Bottacini, Emanuela Callone, Alessandro Pegoretti, Marco Fontana, Sandra Dire
Summary: Barium titanate nanoparticles (BT NPs) were surface functionalized to enhance their compatibility with polymeric matrices, leading to improved physical properties of the epoxy- and PDMS-based nanocomposites. The functionalization process was optimized to increase grafting yield and surface reactivity. The results showed that functionalization improved particle dispersibility and alignment in the PDMS matrix. The nanocomposites also demonstrated potential for use in dielectric elastomer applications.
Article
Polymer Science
Ekaterina I. Lashkovskaya, Nikolai V. Gaponenko, Margarita V. Stepikhova, Artem N. Yablonskiy, Boris A. Andreev, Vadim D. Zhivulko, Alexander V. Mudryi, Igor L. Martynov, Alexander A. Chistyakov, Nikolai I. Kargin, Vladimir A. Labunov, Tamara F. Raichenok, Sergey A. Tikhomirov, Victor Yu. Timoshenko
Summary: Erbium upconversion photoluminescence from sol-gel derived barium titanate xerogel structures on different substrates was studied. The intensity of erbium UC PL can be increased by adding a layer of strontium titanate or codoping with erbium and ytterbium. Tuning of the cavity mode was achieved by assembling a multilayer microcavity structure.
Article
Materials Science, Multidisciplinary
Manju Bala, V. D. Shivling, Sachin Tyagi
Summary: Neodymium-doped nickel spinel ferrite nanoparticles were synthesized using the sol gel method, and it was found that neodymium doping can tune the structural, magnetic, and morphological properties of the nanoparticles. The best impedance matching and maximum attenuation constant were observed in the nickel spinel ferrite with a doping concentration of x = 0.06. These findings suggest that neodymium-doped nickel spinel ferrite has potential applications in microwave absorption in the X-band.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Instruments & Instrumentation
Haiping Zhou, Yanjun Wang, Yuexin Gao, Ze Zhang, Siyu Liu, Yanyan Wang, Meijie Yu, Xianming Wang, Chengguo Wang
Summary: This study prepared composite coatings with low infrared emissivity and low dielectric properties using modified EPDM as binder. Appropriate grafting modification significantly improved the mechanical properties of the composite coatings. The effects of grafting modification on the infrared emissivity and dielectric properties were minimal. The study revealed the mechanism of improved compatibility and interfacial bonding between filler and binder due to grafting modification.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Damien Brault, Thomas Richardot, Philippe Boy, Philippe Belleville, Franck Levassort, Maxime Bavencoffe, Bijun Fang
Summary: Lead-based materials are widely used in piezoceramics due to their high electromechanical properties. However, due to environmental concerns, the use of lead in electronic devices is restricted. Therefore, this study focuses on the development of lead-free ceramics for piezoelectric-based devices. A new sol-gel method was used to synthesize doped barium titanate, which resulted in ceramics with good electromechanical properties. These findings provide a potential method for the processing of lead-free piezoelectric thick films.
Article
Biochemistry & Molecular Biology
Theeranuch Nachaithong, Pairot Moontragoon, Prasit Thongbai
Summary: The (Zn, Nb)-codoped TiO2 nanopowder and ceramic with highly dense microstructure were successfully synthesized. The ZNTO ceramic exhibited thermally activated giant dielectric relaxation, and the outer surface layer had a slight effect on the dielectric properties. Theoretical calculations revealed the presence of specific defect clusters, supporting the absence of electron-pinned defect-dipoles and suggesting an alternative mechanism for the giant dielectric properties.
Article
Materials Science, Composites
Minyoung Seo, Feng Tang, Seok-Ju Kim, Tae-Gyeong Eom, Young-Gi Song, Jin-Hyeok Park, Young Gyu Jeong
Summary: The fabrication, microstructure, thermal property, and piezoelectric performance of flexible waterborne polyurethane (WPU) nanocomposite films reinforced with barium titanate (BT) nanoparticles were investigated. The results showed that the thermal and piezoelectric properties of the nanocomposite films improved with increased nanoparticle content.
POLYMER COMPOSITES
(2023)
Article
Computer Science, Information Systems
Jurgen K. A. Nogueira, Joao G. D. Oliveira, Samuel B. Paiva, Valdemir P. Silva Neto, Adaildo G. D'Assuncao
Summary: A sensor is proposed to characterize the complex permittivity of dielectric materials in a non-destructive and non-invasive way. The sensor is based on a rectangular patch microstrip two-port circuit with a complementary split-ring resonator (CSRR) element. The sensitivity analysis is determined by varying the permittivity of the material under test (MUT). The proposed sensor is simulated and analyzed using Ansoft HFSS software, and the results show good agreement with measurements made on two different dielectric material samples with known complex permittivity values.
Article
Chemistry, Physical
Amany M. El Nahrawy, A. M. Mansour, Ali B. Abou Hammad
Summary: The study successfully investigated the distinctive optical properties of sol-gel Eu3+-doped magnesium lanthanum phosphate thin films, revealing the effects of Eu3+ on various spectroscopic parameters.
Article
Materials Science, Multidisciplinary
Amany M. El Nahrawy, A. M. Mansour, Ahmed M. Bakr, Ali B. Abou Hammad
Summary: Copper-doped ZMT nanoceramics were successfully prepared using the precursor sol-gel method, exhibiting varying microstructures and surface characteristics under different processing conditions. These materials show promising applications in optoelectronics and photocatalysis, with potential for further research and development.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Amany M. El Nahrawy, Ahmed S. Montaser, Ahmed M. Bakr, Ali B. Abou Hammad, A. M. Mansour
Summary: In this study, Fe2O3/ZnO-modified tough polystyrene membrane nanocomposites were successfully synthesized and characterized for various properties. The optical, mechanical, and UV protection efficiency of the membranes were positively influenced by increasing Zn2+ doping concentration, up to 0.5%, before declining.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Amany M. El Nahrawy, Bahaa A. Hemdan, A. M. Mansour, Amir Elzwawy, Ali B. AbouHammad
Summary: The research successfully prepared nano-sized nickel magnesium copper zircon silicate nanocomposite with promising optical and antibacterial properties, making it ideal for applications in food packaging and processing.
Article
Materials Science, Multidisciplinary
A. M. Mansour, Bahaa A. Hemdan, Ali B. Abou Hammad, Hisham A. Saleh, Amany M. El Nahrawy
Summary: The structural and optical properties of ZnO: 50 SiO2: (20-x) CuO (ZSC) nanoclusters loaded with E102 were investigated. These nanoclusters were synthesized using a sol-gel method and the crystallization process was controlled. The phase formation, structural modification, and particle distribution of the nanoclusters were studied using XRD and TEM analysis. The optical transmission and reflection properties were measured, and the optical absorption was calculated. Antimicrobial and toxicity tests were performed, and ZSC-0.07E102 showed excellent antimicrobial activity and biocompatibility.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
S. A. Gad, Ali B. Abou Hammad, Amany M. ElNahrawy
Summary: This study investigated the properties of a series of (Sn0.7-xMo0.3 NdxO2+delta) (0.0 <= x <= 0.3) Nd3+ thin films prepared by sol-gel/spin coating technique. XRD analysis showed that all thin films had a Cassiterite structure. Substituting Nd3+ for Sn4+ ions in the crystal lattice caused a shift in absorption peaks to lower wavenumbers. The films' morphology was examined using SEM. Optical properties such as optical band gap, refractive index (n), and extinction coefficient (k) were studied based on the Nd content. Magnetic characteristics varied depending on the Nd concentration, with diamagnetic, paramagnetic, and ferromagnetic behavior observed. The introduction of active Nd3+ into the Sn:Mo host matrix was confirmed by the observed excitation dependent (PL) in the 350-700 nm range, which revealed two large bands at 425 and 466 nm.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
A. M. Mansour, Ali B. Abou Hammad, Ahmed M. Bakr, Amany M. El Nahrawy
Summary: SiO(2)x:ZnO:(1-x)TiO2 nanocrystallites were synthesized via sol-gel route, co-fired at a lower temperature of 600°C. Analytical techniques including XRD, SEM/TEM, FT IR, THz, and UV-visible spectroscopy analysis were used to characterize the synthesized nanocrystallites. The results showed that the silicate phase promoted the density of the nanocrystalline ceramic during calcination, with the lower temperature calcined nanocrystallites consisting of ZnTiO3, Zn2SiO4, and TiO2 phases, exhibiting various electronic transitions.
Article
Materials Science, Multidisciplinary
Amany M. El Nahrawy, Ali B. Abou Hammad, Amir Elzwawy, M. M. Alam, Abdullah M. Asiri, Jamal Uddin, Md Humayun Kabir, Mohammed M. Rahman
Summary: Magnetic Co(0.8-x)ZrxNa0.2Fe2O4 nanocomposites with controlled size were synthesized successfully. The prepared nanocomposites were analyzed for their morphological and chemical properties. A 4-aminophenol sensor was developed using the prepared nanocomposites and showed good analytical characteristics in phosphate buffer.
EMERGENT MATERIALS
(2022)
Article
Chemistry, Applied
Amany M. El Nahrawy, Ahmed I. Ali, A. M. Mansour, Ali B. Abou Hammad, Bahaa A. Hemdan, Samir Kamel
Summary: Flexible oxidized cellulose (OC) films loaded with different mass fractions of cubic structure Bi0.5Na0.25K0.25TiO3 were prepared and their properties were studied. The results showed that the films had good optical and antibacterial properties, making them potential antibacterial packaging materials.
CARBOHYDRATE POLYMERS
(2022)
Article
Engineering, Electrical & Electronic
Nora Y. Elsheikh, Inas K. Battisha, Ahmed Abo Arais, M. S. Shams
Summary: Pure and doped zinc oxide samples with different concentrations of iron oxide were synthesized and studied for their structural, morphological, and sensing properties. The doped samples showed a nanostructure phase and improved conductivity and impedance, indicating ferromagnetism.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Expression of Concern
Engineering, Electrical & Electronic
Nora Y. Elsheikh, Inas K. Battisha, Ahmed Abo Arais, M. S. Shams
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Multidisciplinary
A. M. Mansour, A. M. Fathi, Ali B. Abou Hammad, Amany M. El Nahrawy
Summary: Research has been conducted on Fe0.8Se0.14Si0.06MoO4 nanocrystallites synthesized using the sol-gel technique. It was found that these nanocrystallites have small crystal size and large surface area, resulting in high specific capacitance. Fe0.8Se0.14Si0.06MoO4 has been identified as a potential positive electrode material for energy storage applications.
Article
Chemistry, Physical
A. M. Mansour, Ali B. Abou Hammad, Amany M. El Nahrawy
Summary: The growth of SiO2-aminopropyltriethoxysilane nanoparticles decorated with carbon nanotubes (CNTs) on a chitosan matrix was examined in this study. Various analytical techniques were employed to investigate the structure, morphology, and optical properties of the semiconductor nanocomposites. The results showed that the incorporation of CNTs enhanced the crystallinity, surface area, and modified the optical properties of the chitosan-SiO2-aminopropyltriethoxysilane composite.
Article
Physics, Multidisciplinary
Ali B. Abou Hammad, Hend S. Magar, Feng Cao, T. Y. Mansour El-Ashkar, Amany M. El Nahrawy
Summary: Complex nano-perovskite materials with doped Ce3+ ions exhibit well-crystalline structures and higher capacitance values, making them promising for supercapacitor applications.
Article
Multidisciplinary Sciences
Amany M. El Nahrawy, Ali B. Abou Hammad, A. M. Mansour
Summary: Mesoporous P2O5 doped magnesium silicate (MS-P) thin films were prepared using the activated sol-gel method and calcinated at different temperatures. The study examined the effects of P2O5 content and calcinating temperature on the structure and optical properties of thin films, showing significant impacts on crystallization and optical band gap. The films demonstrated high transmittance in the visible range, with a blue shift in the optical band gap as P2O5 content and calcinating temperature increased. Refractive index remained constant in the visible zone.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Physics, Condensed Matter
A. Jbeli, N. Zeiri, N. Yahyaoui, P. Baser, M. Said
Summary: The electronic and optical properties of CdSe/ZnSe semiconductor core/shell quantum dots with hydrogenic donor impurity were investigated theoretically. The perturbation and variational methods were used to calculate the binding energy, photoionization cross-section, polarizability, and diamagnetic susceptibility of the excited impurity under various conditions. A significant stark shift in the binding energy was observed under the influence of an external electric field.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Rahat Batool, Tariq Mahmood, Sajid Mahmood, Abdul Aziz Bhatti
Summary: This study investigates the effects of alkali metal doping (Na, K, Cs) on MAPbI3 through compositional engineering. The results show that doping Na, K, and Cs can improve the phase stability, thermodynamic stability, and optical absorption of MAPbI3.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
N. A. N. M. Nor, M. A. H. Razali, W. H. A. W. K. Annuar, N. N. Alam, F. N. Sazman, N. H. M. Zaki, A. S. Kamisan, A. I. Kamisan, M. H. Samat, A. M. M. Ali, O. H. Hassan, B. U. Haq, M. Z. A. Yahya, M. F. M. Taib
Summary: This study investigates the potential of quaternary chalcogenides semiconductors as thin film solar cell absorbers using density functional theory (DFT) and density functional theory plus Hubbard U (DFT + U) approach. The results show that by applying Hubbard U terms, the electronic band gaps can be accurately predicted, providing valuable insights for finding cost-effective new thin film solar cell materials.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Ashwani Kumar, Anuj Kumar, Mohaseen S. Tamboli, Mohd Ubaidullah, J. Jayarubi, S. K. Tripathi
Summary: In this study, lead-based perovskite solar cells are replaced by bismuth-based perovskite cells to overcome their instability and toxicity. CsBi3I10 perovskite films are fabricated using a modified drop-casting process, and the effects of post-annealing temperature on the morphological, structural, and optical properties are investigated. The photovoltaic performance of the cells without a hole transport layer is also quantitatively evaluated.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yang Gao, Shu-Ming Chen, Shuo Cao, Shang-Zhou Zhang, Philippe Djemia, Qing-Miao Hu
Summary: This study investigates the phase stability, elastic modulus, and hardness of ternary nitride Ti1-xAlxN. It is found that the hardness increases with the Al content x. The cubic B1 structure is more stable for x < about 0.75, while the hexagonal structure (B4) is more stable for x > about 0.75. The composition dependent hardness and phase decomposition contribute to the convex shaped hardness curve of Ti1-xAlxN.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Fengqi Wang, Qinyan Ye, Xulin He, Kun Luo, Xiaolong Ran, Xingping Zheng, Cheng Liao, Ru Li
Summary: This report uses rigorous calculations based on density functional theory to study the piezoelectric and elastic properties of wurtzite aluminum nitride (w-AlN) with single- and co-alloying by Hf (or Zr) and Sc. The research finds that the (HfSc)0.375Al0.625N and (ZrSc)0.375Al0.625N with stable wurtzite phase have a large piezoelectric coefficient d33 of 49.18 pC/N and 47.00 pC/N, respectively. However, the piezoelectric voltage constant g33 and electromechanical coupling constant k233 of HfAlN, ZrAlN, HfScAlN, and ZrScAlN are smaller than that of ScAlN, which is attributed to the large dielectric constant epsilon 33 of Hf (or Zr) alloying samples. Furthermore, the calculations of internal parameter u and bond angle alpha elucidate the brittle-to-ductile transformation in alloying w-AlN crystal structure. Electronic structure calculations show that the bandgap decreases almost linearly with the increase of alloying concentration, and the Hf (or Zr) alloying compounds become n-type semiconductors due to the existing high-charge states.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
S. R. Athul, K. Arun, S. Swathi, U. D. Remya, Andrea Dzubinska, Marian Reiffers, Nagalakshmi Ramamoorthi
Summary: The magnetic and magnetocaloric characteristics of Ho6FeSb2 have been studied. The compound exhibits two second-order ferromagnetic transitions, enabling hysteresis-free magnetocaloric effect across a wide temperature range. The alloy has high relative cooling power and magnetoresistance, making it suitable for hysteresis-free magnetocaloric applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: A polycrystalline double perovskite La2CoMnO6 sample was prepared and its structural, dielectric and magnetic properties were investigated. The sample exhibited complex structures and magnetic behavior, and showed good conductivity and dielectric performance. Its multi-domain magnetic structure suggests its suitability for memory device applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Shubha Dubey, Jisha A. Abraham, Kumud Dubey, Vineet Sahu, Anchit Modi, G. Pagare, N. K. Gaur
Summary: This study investigates the optoelectronic, thermodynamic, thermoelectric, and mechanical stability properties of RhTiP Half Heusler semiconductors. The results show that RhTiP is a non-magnetic material with confirmed mechanical stability. It is found to be an indirect-bandgap semiconductor with a good Seebeck coefficient. This study suggests that RhTiP has promising applications in the thermoelectric and optoelectronic fields.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Xun Xie, Jiong-Ju Hao, Hong-Wei Yang
Summary: This work presents a multilayer film structure that uses optical resonance to prepare highly efficient and saturated red, green, and blue transmittance colors. Numerical simulations and analysis show that the structure can produce R, G, and B colors with a purity comparable to standard RGB colors, while maintaining efficient transmission efficiency and obtaining a rich variety of structural colors. Additionally, a metallic interlayer is introduced to selectively suppress resonances in the short-wavelength region, improving the purity of the red color. The study also investigates the effect of the incidence angle on color purity and transmission efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yueqiang Zhao
Summary: Solubility property is of great interest in chemical, physical, pharmaceutical, material, and environmental sciences. Understanding the intrinsic reason behind solubility behavior is a fascinating task. The theoretical relation between binary mutual solubility and liquid-liquid interfacial tension has been derived, where the partitioning of solute molecules between two coexisting liquid phases is determined by the transfer free energy per unit segment for a chain-like solute molecule expressed in terms of solute-solvent interfacial tension. This general theory of solubility is in good agreement with experimental results for binary mutual solubility and molar transfer free energy of solute molecules.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Osama K. M. Bashiar, R. E. Kroon, H. C. Swart, R. A. Harris
Summary: ZnO thin films with near-infrared emission were successfully fabricated using pulsed laser deposition under vacuum conditions, without the need for additional gases or implantation methods. The NIR emission was hypothesized to be caused by defects in the ZnO film due to high energy particle impacts on the sample surface.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
O. Stognei, A. Berezutskii, I. Anisimov, A. Deryabin
Summary: The influence of ZrOn matrix stoichiometry on the electrical and magnetoresistive properties of Fe-Zr-O nanocomposites has been studied. It was found that the magnetoresistive effect is not observed in composites with oxygen lack, while composites with oxygen excess show magnetoresistive effect and increased resistivity. Magnetoresistivity in composites with oxygen lack only appears after heat treatment. These results can be explained by the difference in the density of localized states in the oxide matrix of the composites and the ratio between two types of conductivity.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Mehmet Bayirli, Aykut Ilgaz, Orhan Zeybek
Summary: The present study aims to understand the relationship between impedance characteristics and fractal behaviors. By producing neat and carbon nanotube doped composite specimens, the researchers investigated the electrical properties and surface heteromorphology using Nyquist plots and fractal analysis.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
M. I. Khan, Saddam Hussain, Muhamad Saleem, Fatimah Mohammed Alzahrani, Muhammad Siddique, M. S. Hassan, Allah Ditta Khalid, Munawar Iqbal
Summary: The sol-gel method was used to deposit Ti-doped MAPbBr3 films on FTO-glass substrates with different doping ratios (0%, 4%, and 6%). XRD analysis confirmed the cubic structure of all films, and the 4% Ti-doped film exhibited a large grain size, low band gap energy, and high refractive index. Solar cells fabricated using the 4% Ti-doped MAPbBr3 film showed improved performance in terms of current density, open circuit voltage, fill factor, and efficiency.
PHYSICA B-CONDENSED MATTER
(2024)