Article
Materials Science, Multidisciplinary
Bin Liang, Qishuai Zhu, Xingqi Liao, Kangwei Liu, Zhihua Yang, Dechang Jia, Yu Zhou
Summary: The oxidation behavior and kinetics of partially crystalline Si2BC3N were studied at high temperatures, revealing weight loss due to gas release and the formation of loose oxide scales. Compared to completely amorphous Si2BC3N, partially crystalline Si2BC3N exhibited inferior oxidation resistance, possibly due to changes in superficial chemical compositions and reactivity during crystallization.
Article
Biochemistry & Molecular Biology
Monika Rani, Raashid Ahmad Siddiqi, Gurbir Singh, Ravish Kumar, Dalbir Singh Sogi, Balmeet Singh Gill
Summary: Different extraction methods were studied for gliadin extraction from wheat, with DuPont showing higher zeta potential and smaller particle size compared to other methods. TEM studies revealed compact globular particle arrangement in DuPont and Wallace extracted gliadin.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Inorganic & Nuclear
Rajbala Nain, R. K. Dwivedi
Summary: Samples with compositions x ≤ 0.15 in the Na1-xLaxNb1-xCrxO3 material system were prepared by conventional solid-state reaction method. The study revealed that with increasing dopant concentration, there were changes in crystal structure, red shift in absorption edge, decrease in grain size, weakening or disappearance of high temperature dielectric anomaly, and increase in conductivity.
JOURNAL OF SOLID STATE CHEMISTRY
(2024)
Article
Materials Science, Multidisciplinary
Yeonggeun Cho, Hyung-Jun Cho, Sung-Joon Kim
Summary: The effects of C and N on hydrogen embrittlement (HE) were investigated. C and N increased tensile strength through solid solution hardening and high-density dislocation accumulation, with C being more effective than N in further strengthening through active TWIP effect. The lattice expansion caused by C and N reduced hydrogen diffusivity and depth of the hydrogen-affected zone, enhancing the resistance to HE. C further enhanced the resistance to HE compared to N due to lower hydrogen diffusivity, lower crack severity, and active cross slip.
Article
Chemistry, Physical
Shalendra Kumar, Faheem Ahmed, Nagih M. Shaalan, Rajesh Kumar, Adil Alshoaibi, Nishat Arshi, Saurabh Dalela, Fatima Sayeed, Sourabh Dwivedi, Kavita Kumari
Summary: Spherical CoFe2O4 magnetic nanostructures were successfully synthesized via a microwave-assisted hydrothermal method. Characterization techniques including XRD, FE-SEM, EDX spectroscopy, HR-TEM, SAED, DC magnetization, and dielectric spectroscopy were used to investigate the prepared nanostructures. The results revealed that the nanostructures had a single-phase nature, ferromagnetic ordering at room temperature, and a normal dispersion behavior in dielectric spectroscopy.
Article
Materials Science, Ceramics
Pinki Yadav, Ankur Sharma, Himanshu Srivastava, Indranil Bhaumik, Gurvinderjit Singh, V. S. Tiwari
Summary: A correlation between piezoelectricity and photoluminescence in europium doped (Na0.41K0.09Bi0.5)TiO3 ceramic was investigated, showing an optimum response at 1.0 at.% Eu doping concentration. While photoluminescence intensity increased with Eu concentration, a quenching effect on the hypersensitive 5D0 -> 7F2 transition was observed under an electric field in samples with lower Eu doping concentration.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Sadegh Pour-Ali, Reza Tavangar, Faezeh Akhtari, Seyedsina Hejazi
Summary: The oxidation behavior of GTD-111 Ni-based superalloys with ultrafine-grained surface and polycrystalline counterpart in Ar + 20% O2 at 900 degrees C is studied. The presence of high diffusivity paths on the surface of the ultrafine-grained sample significantly increases the diffusion of scale-former elements and oxygen anions, resulting in a three-layer oxide film that ensures better oxidation performance. Grain refinement reduces the critical concentration of Al for forming a continuous alumina layer.
Article
Materials Science, Multidisciplinary
Pooja Pant, Harshit Agarwal, Suresh Bharadwaj, M. A. Shaz
Summary: This study provides a detailed investigation on the structural correlation and electrical properties of transition metal-doped GdMnO3. The analysis using XRD, Raman spectroscopy, and X-ray photoelectron spectroscopy reveals the influence of Cr and Fe doping on the structure and octahedral distortion in GdMn1-xTxO3. The study also shows the anomalous changes in the dielectric behavior and activation energy, indicating a transition from insulating to semiconducting nature in the doped materials.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Physics, Condensed Matter
Muhammad Zain Yar, Muhammad Khalid, Muhammad Yasin, Kiran Naz, Muhammad Gul Bahar Ashiq, Muhammad Younas, Thamraa Alshahrani, Khaild I. Hussein, Khizar Bin Hassan, Bilal Ahmed, M. Mohamed Javid
Summary: The manganese-substituted nickel-rich lithium-cobalt oxide Li2Ni6MnxCo2-xO10 was successfully synthesized using the sol-gel autocombustion method. The structure and morphology of the material were characterized by XRD and SEM techniques, respectively. The prepared nanomaterial exhibited a hexagonal structure with a secondary phase. The average crystallite size was determined to be between 12 and 27 nm using different methods. SEM analysis showed the surface morphology and particle size distribution. The dielectric characteristics of the material were frequency-dependent, indicating suitability for high-frequency devices. Magnetic measurements revealed variations in saturation magnetization and coercivity with increasing Mn concentration. The obtained dielectric properties suggest potential applications in energy storage.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Zahid Hasan, Hasan Khaled Rouf, Mohammed Nazrul Islam Khan
Summary: Multiferroic composites of (1-x) Ba0.77Ca0.23TiO3 + x Ni0.6Zn0.25La0.15Fe2O4 have been synthesized and their properties systematically investigated. The XRD and SEM analyses show the structural and grain size changes, while VSM measurements reveal the magnetic behavior with increasing ferrite content. The dielectric constant behavior with frequency and AC conductivity from dielectric properties are also described.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
J. Xia, L. Zhang, Y. Matsushita, R. T. Wu
Summary: This study investigates the corrosion and degradation mechanisms of thermal barrier coatings by volcanic ash. Through experimental measurements and analysis, the effects of volcanic ash corrosion on the properties of the coatings are examined, and potential mitigation methods are proposed.
Article
Polymer Science
Nagarajan Kannapiran, Athianna Muthusamy, Sher Singh Meena
Summary: Different concentrations of ZnFe2O4 and manganese substituted ZnFe2O4 nanoparticles dispersed poly(o-phenylenediamine)/ferrite nanocomposites were prepared by in-situ oxidative polymerization method, and their properties were characterized. XRD pattern showed good interaction between nanoparticles and PoPD, with changes in crystalline size and morphology. Mossbauer spectra indicated iron in Fe3+ high spin state, and magnetic studies revealed ferromagnetic nature with saturation magnetization increasing with nanoparticle concentration in PoPD/ferrite nanocomposites. PoPD/ZnFe2O4 exhibited higher dielectric constant than PoPD/MnZnFe2O4, while AC conductivity increased with frequency and temperature in PoPD/ferrite nanocomposites.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jonathan Apell, Robert Wonneberger, Martin Seyring, Hartmut Stoecker, Markus Rettenmayr, Andreas Undisz
Summary: The oxidation behavior of a complex alloy was studied, showing that the oxide contains considerable amounts of Fe, Co, and Ni with nodules formed at 800 degrees C, and the dominant formation of spinel-type oxide at both low and high temperature.
Article
Chemistry, Physical
Maxim Ozerov, Vitaly Sokolovsky, Sergey Nadezhdin, Ekaterina Zubareva, Nadezhda Zherebtsova, Nikita Stepanov, Lujun Huang, Sergey Zherebtsov
Summary: The TiZrNb metal-matrix composites reinforced by in-situ formed borides were produced using different amounts of TiB2. The composites exhibited varying microstructures and mechanical properties with the increase in boride content. Load transfer strengthening was found to be the main contributor to the overall strength of the composite. The biocompatibility evaluation suggested a decrease in the proliferation rate of mesenchymal stem cells with an increase in boride content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Indranil Roy, Hamdy Abouelella, Rupesh Rajendran, Atharva S. Chikhalikar, Michael Larsen, Rajnikant Umretiya, Andrew Hoffman, Raul Rebak
Summary: Accident tolerant cladding materials with improved properties under LOCA conditions are needed. FeCrAl alloys, with high-temperature steam oxidation resistance, show promise. However, the compositional effects on FeCrAl performance at operating conditions have not been well understood. This study investigates the effect of Al concentration in three Fe-17Cr-xAl alloys on oxidation resistance at 400°C in a steam environment, and finds that increased Al concentration can reduce total oxide thickness, enhance the formation of a uniform Cr-oxide layer, and allow for the formation of a Croxide, Al-oxide bilayer when Al concentration is sufficient.
Article
Environmental Sciences
Lotfi Sellaoui, Sarra Said, Mohamed Bouzidi, Abdullah Sarhan Alshammari, Ziaul Raza Khan, Mohamed Gandouzi, Carlos Schnorr, Guilherme Luiz Dotto, Luis Silva, Angelica Fatima Streit, Abdelmottaleb Ben Lamine, Alessandro Erto
Summary: In this research, activated carbon derived from sludge is used for the adsorption of Reactive Black 5 and Green Alizarin dyes in wastewater. The adsorption capacities and behavior of the dyes are studied at different temperatures. The results show that the activated carbon has good performance in removing these dyes, and physical models provide insights into the adsorption mechanism. The orientation and aggregation process of the dyes on carbon are identified. The impact of temperature on the adsorption process is also evaluated, indicating its relevance in dye removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Mansour Mohamed, A. Sedky, Abdullah S. Alshammari, Z. R. Khan, M. Bouzidi
Summary: We investigate the behavior of Sn1-x-yZnxMyOz varistors and find that Zn doping decreases the sizes and porosity of SnO2, followed by further decrease by (Zn + M) co-substitution. The substitution of SnO2 by Zn results in decreased leakage current and residual voltage, and increased breakdown field and nonlinear coefficient. The co-substitution in the SnZnMn sample increases the breakdown field and nonlinear coefficient, while decreasing the leakage current and residual voltage. These findings are attributed to oxygen vacancies.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
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
Materials Science, Multidisciplinary
Amira Ben Gouider Trabelsi, Fatemah H. Alkallas, V. Kamlesh Chandekar, Ashwani Kumar, Mohd Ubaidullah, Mohd Shkir, Aslam Khan, M. Aslam Manthrammel, S. AlFaify
Summary: The present article explores the structural, morphological, and optoelectronic properties of Silver (Ag) doped Lead sulfide (PbS) nanoparticles. X-ray diffraction and scanning electron microscopy were used to examine the structural and morphological properties of the nanoparticles. The doping of Ag into the PbS lattice and the increase in electrical properties of Ag-doped PbS nanoparticles were confirmed. The optical band gaps and Urbach energies of the nanoparticles were also determined.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
R. Balakarthikeyan, A. Santhanam, S. Vinoth, Ahmed A. Abdeltawab, Sayed Z. Mohammady, Mohd Ubaidullah, Shoyebmohamad F. Shaikh, Mohammad Shahzad Samdani, M. Aslam Manthrammel, Mohd Shkir
Summary: ZnS and ZnS:Pr thin films were prepared using low-cost nebulizer spray pyrolysis technique and were characterized for their structural, morphological, optical, and photosensing properties. The results showed that the films exhibited hexagonal wurtzite structure with preferred growth along the (002) plane. The ZnS:Pr1% sample demonstrated higher UV absorption and decreased bandgap compared to other samples. The I-V characteristics indicated that the ZnS:Pr1% sample had superior photosensing properties, suggesting its suitability for UV photodetector applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
K. V. Gunavathy, S. Vinoth, R. S. Rimal Isaac, B. Prakash, S. Valanarasu, Amira Ben Gouider Trabelsi, Mohd Shkir, S. AlFaify
Summary: The influence of rare earth doping on the efficiency of photodetection in In2S3 thin films was investigated. The films were doped with various weight percentages of cerium ions and characterized using appropriate techniques. The results showed that the structural, morphological, optical, and light sensing capabilities of the films were affected by the cerium doping. The sample doped with 2% cerium exhibited the highest responsivity, detectivity, and EQE values.
Article
Physics, Condensed Matter
Sridhar Sampath, V Rohini, Karthik Chinnasamy, Parasuraman Ponnusamy, Sivasakthi Thangarasau, Woo Kyoung Kim, Vasudeva Reddy Minnam Reddy, Mohd Shkir, F. Maiz
Summary: Magnetically retrievable Cobalt doped ZnO nanowires were synthesized via a simple solvothermal method. The structural and performance characteristics of Co-ZnO nanowires were analyzed using various characterization techniques. The band gap energy of ZnO nanowires decreased and the absorption peak showed a slight wavelength shift towards longer wavelengths with increasing Co doping concentration. PL analysis revealed a decrease in PL intensity of ZnO nanowires after cobalt doping. Co-ZnO nanowires exhibited ferromagnetic properties, with increased coercivity and retentivity as the cobalt concentration increased. Improved visible light photocatalytic activity for the breakdown of methyl orange dye was achieved by Co-ZnO nanowires.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Analytical
Asmaa M. Elsayed, Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Salem AlFaify, Mohd Shkir, Tahani A. Alrebdi, Kholoud S. Almugren, Feodor V. Kusmatsev, Mohamed Rabia
Summary: A graphene oxide/poly 3-methyl aniline photodetector was developed for light detection in the UV, Vis, and IR spectrum. The composite exhibited good optical properties and a decrease in bandgap after formation. The photodetector showed promising current density and R/D values in the UV and IR regions, making it an excellent candidate for future light detection instruments.
Article
Materials Science, Multidisciplinary
Fatemah H. Alkallas, Asmaa M. Elsayed, Amira Ben Gouider Trabelsi, Salem AlFaify, Mohd. Shkir, Tahani A. Alrebdi, Kholoud S. Almugren, Feodor V. Kusmatsev, Mohamed Rabia
Summary: Rolled graphene oxide (roll-GO) with a unique morphology was synthesized and used to prepare a roll-GO/PANI composite material. The composite exhibited a small bandgap and excellent optical properties across a wide range. Structural analysis confirmed the chemical structure and functional groups present in the composite material. The roll-GO/PANI composite material showed high light sensitivity as a photodetector, with enhanced current density under light compared to dark conditions at different wavelengths.
Article
Chemistry, Multidisciplinary
Kamlesh V. Chandekar, Baskaran Palanivel, Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Aslam Khan, I. M. Ashraf, S. AlFaify, Mohd. Shkir
Summary: Pure Nickel oxide (NiO) nanoparticles and Mg-doped NiO (Mg:NiO) were synthesized using a one-pot auto-combustion process in the presence of citric acid. The Mg:NiO nanoparticles showed a spherical morphology and their average particle size distributions varied with the concentration of Mg doping. The Mg:NiO nanoparticles exhibited potential photocatalytic activity in the degradation of methylene blue (MB) dye under UV light irradiation.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Loyola Poul Raj, S. Valanarasu, Amira Ben Gouider Trabelsi, Fatemah. H. Alkallas, Mohd. Shkir, S. Alfaify, Kuldeep K. Saxena
Summary: Developing In2S3 nanolayers using a cost-effective approach for light-current conversion has seen significant progress in recent decades. In this study, we achieved high photo-current in indium sulfide (In2S3) thin films by varying the praseodymium (Pr) content. The addition of Pr improved the grain size and light-matter interactions in the films, resulting in excellent photosensor properties.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Physics, Condensed Matter
S. Hemasankari, S. Priyadharshini, D. Thangaraju, V. Sathiyanarayanamoorthi, Njod Al Sdran, Mohd Shkir
Summary: Trivalent Neodymium doped CoFe2O4 was found to be a potent photocatalyst for wastewater treatment. The synthesized materials were characterized using X-ray Diffraction, Raman studies, optical UV-Visible spectroscopy, XPS spectra, and SEM to confirm their structural and optical properties. The 5% Nd doped CoFe2O4 demonstrated enhanced photocatalytic activity with a degradation efficiency of 72% within 4 hours, making it a promising candidate for wastewater treatment.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Physics, Multidisciplinary
Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Mohd Shkir, Manish Gupta
Summary: In this study, undoped and Tb-doped In2S3 thin films were successfully synthesized using the economical nebulizer spray pyrolysis technique, and their photosensing characteristics were investigated. The results showed that the films exhibited maximum absorption in the UV region and had a small bandgap. The In2S3:Tb (2wt%) thin film showed better performance in terms of photocurrent, responsivity, and detectivity.
Article
Nanoscience & Nanotechnology
Mohd. Shkir, Kamlesh Chandekar, Baskaran Palanivel, Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Aslam Khan, S. AlFaify, Ahmad Umar, Ahmed A. Ibrahim, S. Baskoutas
Summary: This study discusses the opto-photocatalytic applications of Mn-doped NiO nanoparticles. Different Mn contents are doped into NiO using a simple synthesis method, and their structural properties and microstructural parameters are examined. The crystallite size decreases with increasing doping concentration in the NiO host lattice. The 2.5-wt.% Mn:NPs exhibit the best photocatalytic performance owing to the greatest activation sites. The results demonstrate the high ability of Mn:NiO NPs as photocatalysts for methylene blue dye degradation, with 92% removal.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2023)
