Article
Physics, Condensed Matter
N. Sivakumar, J. Gajendiran, Ali Alsalme, Kentaro Tashiro
Summary: This study compares the surface structural behavior, electrochemical sensing, and magnetic properties of undoped and Sr-doped lanthanum ferrite (LaFeO3) products. The results show that the Sr-doped LaFeO3 nanoparticles have smaller size, dispersed particles, higher band gap, coercivity, and specific capacitance compared to undoped LaFeO3 nanoparticles.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Multidisciplinary
Krishna Chandra Dubey, Anam Zaidi, Ram Raseele Awasthi
Summary: In this research, Zn1-xAlxO thin films with varying proportions of Al were prepared and characterized for their crystal structure, morphology, and humidity-sensing properties. The results showed that increasing the Al-doping concentration led to larger crystallite sizes, changes in surface morphology, and improved humidity sensing performance.
Article
Chemistry, Physical
K. Chandramouli, B. Suryanarayana, T. Anil Babu, Vemuri Raghavendra, D. Parajuli, N. Murali, Venkaiah Malapati, Tulu Wegayehu Mammo, P. S. Shanmukhi, Umesh Reddy Gudla
Summary: The structure, particle size, and antibiotic nature of synthesized ZnO nanoparticles were studied using XRD, TEM, and FTIR, revealing spherical particles with a single wurtzite hexagonal crystal structure. The correlation between defect and antibiotic properties of ZnO was identified.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Shalendra Kumar, Faheem Ahmed, Naushad Ahmad, Nagih M. Shaalan, Rajesh Kumar, Adil Alshoaibi, Nishat Arshi, Saurabh Dalela, Fatima Sayeed, Kavita Kumari
Summary: In this study, Cu-doped ZnO nanostructures were prepared using a microwave-assisted chemical route synthesis. The synthesized nanostructures were characterized structurally, morphologically, optically, and magnetically. The results showed that the samples had a single-phase polycrystalline hexagonal crystal structure, with a decrease in lattice parameters by increasing Cu% doping. The samples exhibited photoemission in the UV and blue-green regions, with changes in these regions caused by Cu doping, and Cu ions successfully incorporated into the ZnO lattice. All of the samples exhibited ferromagnetic behavior, with enhanced ferromagnetic character with increasing Cu%.
Article
Materials Science, Multidisciplinary
Mansour Mohamed, A. Sedky, Abdullah S. Alshammari, Z. R. Khan, M. Bouzidi, M. Gandouzi
Summary: The structural, optical, and photocatalytic properties of Zn1-xBixO samples (0.00 < x < 0.20) were investigated. Increasing the Bi content to 0.20 led to an increase in the a-parameter, unit cell volume, crystallite size, and porosity, while the c-parameter decreased. Adding Bi to ZnO increased the Young and bulk modulus, and all samples exhibited brittleness. Optical analysis showed that all Zn1-xBixO samples had two direct band gaps (Eg1/Eg2), with values decreasing up to 0.10 Bi content and then increasing up to 0.20 Bi. Introducing Bi3+ ions increased the reflective index of ZnO. Photocatalytic activity was reduced by 0.025 Bi doping but enhanced by increasing the Bi content to 0.20. These findings suggest that Zn1-xBixO nanoparticles are more suitable for optoelectronic devices and water purification.
Article
Chemistry, Multidisciplinary
Rajwali Khan, Ihab Shigidi, Sattam Al Otaibi, Khaled Althubeiti, Sherzod Shukhratovich Abdullaev, Nasir Rahman, Mohammad Sohail, Alamzeb Khan, Shahid Iqbal, Tommaso Del Rosso, Quaid Zaman, Aurangzeb Khan
Summary: In this study, the co-precipitation approach was used to synthesize ZnO, Zn0.96Gd0.04O, and Zn0.96-xGd0.04CoxO nanotubes. The effects of gadolinium and cobalt doping on the microstructure, morphology, and optical characteristics of ZnO were investigated. It was found that gadolinium and cobalt doping did not affect the morphology of the nanotubes, but reduced the crystallinity of the samples. The doping also resulted in changes in the optical characteristics and electrical conductivity of the nanotubes.
Article
Engineering, Electrical & Electronic
Mansour Mohamed, Mohamed Jayiz, Abdullah S. Alshammari, A. Sedky, Z. R. Khan
Summary: In this study, the structural, morphological, optical, and photocatalytic properties of different Mn3O4/ZnO, CuO/ZnO, and Fe2O3/ZnO nanocomposites were compared. XRD and SEM analysis confirmed the nanostructure nature of the studied composites. The nanocrystalline ZnO, M3O4, CuO, and Fe2O3 phases with different crystalline structures were observed. The morphology of ZnO-based nanocomposites depended on the metal oxide added. Furthermore, the nanocomposites exhibited different optical properties and the Fe2O3/ZnO nanocomposites showed the highest photocatalytic activity for water purification.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Saleem, Kashif Irshad, Saif Ur Rehman, M. Sufyan Javed, Mohd Abul Hasan, Hafiz Muhammad Ali, Amjad Ali, Muhammad Zeeshan Malik, Saiful Islam
Summary: The addition of Au in ZnO-Sm nanoparticles film can significantly enhance the efficiency of DSSCs, mainly attributed to the formation of a blocking layer and up/down-conversion process.
Article
Materials Science, Ceramics
S. Gopinath, M. Mayakannan, S. Vetrivel
Summary: This study presents the synthesis of silver doped cobalt oxide nanoparticles using a microwave-assisted method, and investigates their structural, optical, and antibacterial activities. The results show that the doping concentrations affect the crystallite size, with the highest activity observed at 20% silver doping.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Sidra Kanwal, Muhammad Tahir Khan, Vineet Tirth, Ali Algahtani, Tawfiq Al-Mughanam, Abid Zaman
Summary: Pure ZnO and Mn-doped ZnO nanoparticles were synthesized using the sol-gel autocombustion method. X-ray diffraction revealed a hexagonal wurtzite structure and different microstructures for all samples. Increasing the doping concentration resulted in a decrease in crystallite size. Infrared spectra showed a red shift in absorption bands with increasing Mn content, while the energy band gap decreased. Magnetic properties changed from diamagnetic for pure ZnO to room-temperature ferromagnetic for doped samples. The achieved room-temperature ferromagnetism in Mn-doped ZnO nanoparticles could have practical applications in the future.
Article
Materials Science, Ceramics
Fazal Kabir, Adil Murtaza, Azhar Saeed, Awais Ghani, Anwar Ali, Saleh Khan, Kaili Li, Qizhong Zhao, Kang Kang Yao, Yin Zhang, Sen Yang
Summary: The synthesis and characterization of Pr and Fe co-doped ZnO nanoparticles were investigated. The nanoparticles exhibited excellent optical and magnetic properties, making them promising candidates for spintronics applications.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Condensed Matter
Reza Mohammadigharehbagh, Suat Pat, Nihan Akkurt, Sadan Korkmaz
Summary: The research found that Fe-doped ZnO magnetic nano-crystal thin films have different morphological, structural, optical, and electrical properties on different substrates. These films exhibit ferromagnetism and have giant magnetic moments and electrical conductivity.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Azhar, Ghazi Aman Nowsherwan, Muhammad Aamir Iqbal, Saira Ikram, Azqa Farrukh Butt, Mohsin Khan, Naushad Ahmad, Syed Sajjad Hussain, Muhammad Akram Raza, Jeong Ryeol Choi, Saira Riaz, Shahzad Naseem
Summary: This study investigates the potential use of cadmium sulfide (CdS) as a buffer layer in CdTe solar cells. The optical, photoluminescence, morphological, and electrical properties of CdS films doped with rare-earth metals were analyzed. Results show that the doping of samarium and lanthanum enhances conductivity and modifies the morphology of CdS. Optical and electrical measurements indicate changes in transmission and bandgap, suggesting the potential for improving the efficiency of photovoltaic devices. Photoluminescence spectra analysis reveals emission peaks in the visible region, attributed to electronic transitions. The findings indicate the viability of using doped CdS in photovoltaic systems.
Article
Engineering, Electrical & Electronic
V. S. Kamble, Y. H. Navale, V. B. Patil, N. K. Desai, S. N. Vajekar, S. T. Salunkhe
Summary: Pristine and Co-doped ZnO nanocapsules were successfully prepared using a cost-effective method, and the 3% Co-doped ZnO sensor exhibited the highest gas response to NO2 with fast response/recovery time and stability towards 100 ppm concentration at 200 degrees C.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
A. A. Ahmad, A. B. Migdadi, A. M. Alsaad, Qais M. Al-Bataineh, Ahmad Telfah
Summary: A well-prepared ZnO and (Cd-Ni) co-doped ZnO thin films were synthesized using sol-gel method, with optical, structural, and morphological characterizations performed to analyze the impact of co-doping ratio on transmittance and reflectance.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Physics, Multidisciplinary
A. Srour, W. Malaeb, M. Rekaby, R. Awad
Article
Physics, Applied
Sy Farhat, M. Rekaby, R. Awad
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2018)
Article
Physics, Applied
N. H. Mohammed, A. I. Abou-Aly, R. Awad, I. H. Ibrahim, M. Roumie, M. Rekaby
JOURNAL OF LOW TEMPERATURE PHYSICS
(2013)
Article
Physics, Applied
N. H. Mohammed, R. Awad, A. I. Abou-Aly, I. H. Ibrahim, M. Roumie, M. Rekaby
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2012)
Article
Physics, Applied
M. Rekaby, M. Roumie, A. I. Abou-Aly, R. Awad, M. Yousry
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2014)
Article
Biotechnology & Applied Microbiology
Mona Rekaby
CURRENT NANOSCIENCE
(2020)
Article
Materials Science, Multidisciplinary
M. Rekaby, H. Shehabi, R. Awad
MATERIALS RESEARCH EXPRESS
(2020)
Article
Materials Science, Multidisciplinary
M. Rekaby
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
M. Rekaby, N. H. Mohammed, M. Ahmed, A. Abou-Aly
Summary: The research focuses on investigating the impact of nano-sized Y3Fe5O12 addition on the microstructure and mechanical properties of the polycrystalline CuTl-1223 superconductor. It was found that adding Y3Fe5O12 nanoparticles can reduce weak links and voids among the CuTl-1223 superconducting grains, leading to an increase in volume fraction of CuTl-1223 and hardness.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Multidisciplinary
M. Rekaby, R. Awad, N. H. Mohammed, M. Ahmed, A. Abou-Aly
Summary: This study investigated the influence of adding Yttrium iron garnet (Y3Fe5O12) nanoparticles on the microstructure and fluctuation-induced conductivity of CuTl-1223 superconductor. The results showed that the unit cell parameters remained unchanged with the addition of Y3Fe5O12, while the volume fraction of the host phase increased. The different vibrational modes of the samples were identified through Fourier transform infrared spectroscopy. The study also found the presence of short wave fluctuations at high temperatures and a crossover between short wave fluctuations and the mean-field region at lower temperatures.
BRAZILIAN JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
M. Rekaby, M. Matar
Summary: A mechanochemical route was used to prepare BiVO4 with an average grain size of 20 nm. Solid-state reaction was employed to synthesize (BiVO4)(x)/Cu0.5Tl0.5Ba2Ca2Cu3O10-δ composites by adding appropriate amounts of BiVO4(x). The addition of BiVO4(x) resulted in a decrease in the superconducting critical temperature (Tc) and the emergence of different conduction mechanisms.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Multidisciplinary Sciences
M. Rekaby, A. I. Abou-Aly, M. El-khatib
Summary: In this study, a novel magnetic nanocomposite adsorbent was synthesized and investigated for the removal of methyl orange (MO) from aqueous solutions. The results showed that the nanocomposite had a high removal efficiency for MO under appropriate conditions. Isotherm and kinetic studies revealed that the adsorption sites were uniformly distributed and the adsorption process followed the intra-particle diffusion and pseudo-second order models. Additionally, the recyclability of the adsorbent was demonstrated through multiple adsorption-desorption cycles.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Inorganic & Nuclear
R. O. El-Zawawy, M. S. Masoud, A. E. Ali, M. R. Mosa
INORGANIC CHEMISTRY COMMUNICATIONS
(2020)