Article
Materials Science, Multidisciplinary
Mohamed Amine Ghebouli, Brahim Ghebouli, Aldjia Zeghad, Tayeb Chihi, Messaoud Fatmi, Sameh Ibrahim Ahmed
Summary: The study focused on the structural, elastic, electronic, dynamic, and optical properties of scandium and yttrium nitrides in the zinc blend structure, utilizing various computational approaches. Results indicated that ScN and YN exhibit elastic stability and ductility in the zinc blend structure, with isotropic linear compressibility and anisotropic mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
H. Aghababaei, A. Faeghinia, F. Soleimani
Summary: The P2O5-TiO2-CaO system was studied as a suitable host for rare-earth ions. Glasses doped with neodymium showed an increase in absorbance and a decrease in emission intensity, indicating a change in optical properties. The addition of Nd also led to a decrease in direct optical band gap energy and an increase in Urbach energy.
Article
Engineering, Electrical & Electronic
R. Ben Said, N. Moutia, B. Louati, K. Guidara, K. Khirouni
Summary: New Zn2P2O7, K2ZnP2O7, and KZn1.5P2O7 compounds were synthesized using the conventional solid-solid reaction method. Their optical properties were investigated using UV-Visible spectrophotometer, revealing the optical band gaps and other optical parameters.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Polymer Science
Vinayak S. Bhat, S. B. Kapatkar, N. H. Ayachit, Ishwar Naik, M. S. Murari
Summary: Composite films of PFO/PMMA with various PFO concentrations were prepared and studied for their optical properties. The segregation of PFO increased with doping concentration, while the absorption spectrum intensity, band gap values, Urbach energy values, and refractive index all showed changes with doping concentration, stabilizing around 1 wt% of PFO. This study demonstrates the impact of doping concentration on the optical properties of PFO/PMMA composite.
Article
Materials Science, Multidisciplinary
Yasemin Pepe, Mehmet Isik, Ahmet Karatay, Nizami Gasanly, Ayhan Elmali
Summary: This report investigates the nonlinear absorption characteristics of PbMoO4 single crystal and finds that the nonlinear absorption coefficient increases with the input intensity. This observation is associated with the generation of more excited electrons and the contribution of free carrier absorption to nonlinear absorption.
Article
Chemistry, Physical
Alberto Mannu, Francesca Cardano, Andrea Fin, Salvatore Baldino, Cristina Prandi
Summary: This study analyzed the structural features of five ternary eutectic systems containing choline chloride through UV-VIS spectroscopy, investigating the relationship between composition and energy. The results showed that composition and operational parameters influence structural disorder, and the DES-aging has a significant impact on the system structure.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Materials Science, Multidisciplinary
Refka Sai, Hatem Ezzaouia, Muaffaq M. Nofal
Summary: The self-consistent band structure and density of states of iron pyrite FeS2 were obtained using the LMTO-ASA method, revealing a direct band gap of 0.90508 eV that aligns with experimental measurements. The calculated density of states shows full occupation of the valence band and empty first conduction band.
RESULTS IN PHYSICS
(2021)
Article
Energy & Fuels
Rico Gutzler, Wolfram Witte, Ana Kanevce, Dimitrios Hariskos, Stefan Paetel
Summary: Large sets of experimental data are crucial for evaluating statistical device performance and identifying underlying trends. This study presents a standardized and optimized inline fabrication process and applies statistical analysis to tens of thousands of chalcopyrite-type Cu(In,Ga)Se-2 cells. The abundance of samples allows for highlighting the benefits of Ag alloying in the absorber and its relationship with compositional and optoelectronic properties. The impact of chemical composition on solar cell parameters emphasizes the importance of fill factor on overall cell performance. Additionally, the study demonstrates that increasing the amount of Cu and/or Ag can reduce losses in open-circuit voltage due to radiative losses.
PROGRESS IN PHOTOVOLTAICS
(2023)
Article
Chemistry, Multidisciplinary
Abishek K. Iyer, Jeong Bin Cho, Hye Ryung Byun, Michael J. Waters, Shiqiang Hao, Benjamin M. Oxley, Venkat Gopalan, Christopher Wolverton, James M. Rondinelli, Joon Jang, Mercouri G. Kanatzidis
Summary: The study investigated the crystal structures and optical properties of mixed cation compounds Na1-xKxAsSe2 (x = 0.8, 0.65, 0.5) and Na0.1K0.9AsS2, revealing that the interaction between different ratios of K atoms can affect the properties and band gap of the compounds.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Mantas Norkus, Andrius Laurikenas, Diana Vistorskaja, Kestutis Mazeika, Dalis Baltrunas, Ramunas Skaudzius, Aldona Beganskiene, Aivaras Kareiva
Summary: This study investigates the substitution effects of the first four lanthanides (La, Ce, Pr, and Nd) in yttrium iron garnet (Y3Fe5O12, YIG) and finds that the substitutional level is dependent on the nature of the lanthanide element.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
K. Lizarraga, L. A. Enrique-Moran, A. Tejada, M. Pineiro, P. Llontop, E. Serquen, E. Perez, L. Korte, J. A. Guerra
Summary: We propose new optical dispersion models that accurately describe the imaginary part of the electrical permittivity of dielectric and semiconductor materials. Our models incorporate the Urbach tail and Lorentz oscillator behavior, and we derive a five-parameter formula based on the Tauc-Lorentz dispersion model and the band-fluctuations approach. The models are successfully applied to various direct and indirect semiconductors, accurately capturing the spectra of the imaginary part of the electrical permittivity.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
S. Cetinkaya Colak
Summary: Sodium calcium silicate glasses incorporated with V2O5 were prepared using the melt-quench technique. The addition of ZnO improved light transmittance, while V2O5 reduced the optical band gap. The structural, thermal, and optical properties of the glasses were investigated.
Article
Materials Science, Ceramics
Iliyasu Usman, Mohamad Syazwan Mohd Sanusi, Nor Ezzaty Ahmad, Mohd Shafiq bin Shaharin
Summary: The influence of & alpha;-Fe2O3 nanoparticles on the structural, physical, and optical properties of synthesized glass was investigated. The addition of & alpha;-Fe2O3 led to changes in density, molar volume, B-O-B bond intensity, optical band gap, transmission coefficient, reflectance loss, Urbach energy, interatomic separation, metallization, refractive index, molar refractivity, electronic polarizability, and dielectric constant. The glass with & alpha;-Fe2O3 showed semiconductor properties and is suitable for photonic applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Min-Ji Kim, Hye-Jin Ok, Youngkyun Son, Guiyoung Gu, Dong-Woo Suh, Ki-Suk Lee, Sukbin Lee
Summary: The microstructural characterization of polycrystalline yttrium iron garnet (YIG) during high temperature sintering showed that grain coarsening occurred via normal grain growth, with the 1050-min and 1750-min samples exhibiting narrower x-ray peaks and smaller local misorientation compared to the 350-min sample. Additionally, EPMA analyses indicated a more uniform distribution of elements in the 1750-min sample, with little segregation of metal elements observed on the grain boundary in the current YIG samples.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Yuzheng Wang, Xiaoxu Wang, Laishi Li, Yusheng Wu
Summary: Doping of B and Y ions in TiO2 nanoparticles can enhance their properties by reducing crystallite size, improving specific surface area, and broadening the optical response range. Density of states and charge density calculations indicate that B doping redistributes electrons in the O 2p state, promoting the ability of surrounding Ti 3d and Y 5d states to capture electrons.
Article
Materials Science, Ceramics
Yaseen K. R. Shariff, Harish K. Choudhary, Vijay Khopkar, Ankit Yadav, R. Madhusudhana, Balaram Sahoo
Summary: This study reports the synthesis mechanism of Ba-Sr hexaferrite ceramic powders, revealing different phase evolution under various annealing conditions associated with the ionic radii difference, leading to the presence of multiple phases. The growth of hexagonal-shaped particles with varied sizes suggests the influence of ionic radii difference on the sinterability of the samples. The research provides a better understanding of the synthesis mechanism of Ba-Sr hexaferrite samples.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Rajeev Kumar, Mustaque A. Khan, A. Anupama, Saluru B. Krupanidhi, Balaram Sahoo
Summary: MWCNTs and N-MWCNTs were synthesized using the pyrolysis technique, with Ag-MWCNTs-Ag structured devices fabricated for infrared detection showing superior performance. The external quantum efficiency of the N-doped MWCNTs based device is much higher than the undoped one, attributed to higher infrared absorption and trap assisted gain influenced by band structure modifications.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Ankit Yadav, Rajeev Kumar, Umesh Pratap Pandey, Balaram Sahoo
Summary: The study demonstrates that graphene oxide (GO) grafted with a glycine layer provides more reliable corrosion protection for metals compared to reduced graphene oxide (rGO) and nitrogen-doped reduced graphene oxide (N-rGO).
Article
Materials Science, Multidisciplinary
Harish Kumar Choudhary, Rajeev Kumar, Shital Patangrao Pawar, Balaram Sahoo
Summary: Enhanced graphitization-induced conductivity plays a crucial role in improving electromagnetic interference shielding effectiveness in pyrolysis-derived Fe3C@C nanocomposites, with higher synthesis temperature leading to better conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
P. N. Anantharamaiah, H. M. Shashanka, R. Kumar, J. A. Chelvane, B. Sahoo
Summary: Phase pure cobalt-ferrite and Zn-substituted cobalt-ferrite nanopowders were synthesized by a combustion route, showing excellent magnetostriction behavior for potential applications in highly sensitive strain sensors.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shivanand Madolappa, Harish K. Choudhary, Nancy Punia, A. Anupama, Balaram Sahoo
Summary: In this study, A-site Mn-doped Bi0.5Na0.5TiO3 polycrystalline ceramic was synthesized and its dielectric properties were investigated. The results showed that the electric conduction in the samples is mainly attributed to oxygen ion vacancy defects, with Mn-doping enhancing the dielectric behavior.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Ankit Yadav, Rajeev Kumar, Balaram Sahoo
Summary: In this study, excellent supercapacitance was achieved in nitrogen-doped reduced graphene oxide (N-rGO) sheets by controlling the amount of nitrogen content through the use of different ratios of GO and urea during solvothermal synthesis. The N-content in N-rGO samples increased with the amounts of urea and stabilized at around 14% for GO : urea ratios beyond 1 : 8. The obtained N-rGO sheets with 5% N-content showed excellent supercapacitor properties, with a maximum specific capacitance of 514 F g(-1) at a current density of 0.5 A g(-1). The study highlights the importance of proper stacking of rGO sheets with moderate N-content and defects in achieving high specific capacitance and excellent cyclic stability.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yujin Jeong, Rajeev Kumar, Youngil Lee
Summary: In this study, carbon-coated and iodine-doped monoclinic LiFeBO3 was synthesized to enhance its electrochemical performance as a cathode material in lithium-ion batteries. The introduction of iodine as a highly electronegative dopant and the deposition of a thin carbon layer effectively improved the conductivity and stability of the material. The synthesized LFBI/C exhibited higher specific discharge capacity and superior rate performance compared to carbon-coated LiFeBO3, with significantly high capacity retention even at high charging rates.
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Rajeev Kumar, Jeongin Kim, Youngil Lee
Summary: Samples of core/yolk-shell structured, carbon-coated vonsenite (Fe3BO5) are synthesized and used as conversion-type anode materials. The samples synthesized at a lower temperature (600 degrees C) exhibit better electrochemical characteristics due to smaller crystal size, less metallic impurities, and a well-formed solid electrolyte interphase (SEI). These optimized samples show an outstanding reversible discharge capacity of 976 mAh g-1 at a current density of 0.05 A g-1. They also demonstrate good electrochemical activity at an ultra-high C-rate of 20 A g-1, validating their usefulness as safe and stable anodes for fast charging-discharging Li-ion batteries.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Rajeev Kumar, Jeong-in Kim, Yujin Jeong, Youngil Lee
Summary: Carbon coating with sucrose as the precursor results in a high-purity monoclinic LiFeBO3 phase. However, its poor performance at high C-rates limits its utility in electric vehicles. To overcome this challenge, this study carefully optimizes the synthesis conditions, such as temperature and reducing atmosphere.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Ankit Yadav, Rajeev Kumar, Sarvesh Kumar, Balaram Sahoo
Summary: Graphene oxide (GO) sheets were prepared using the improved Hummers' method and then simultaneously reduced and nitrogen-doped using a simple solvothermal route to obtain Nitrogen-doped reduced graphene oxide (N-rGO) sheets. The amount of nitrogen doping was controlled by adjusting the ratio of GO and urea. The study investigated the effect of different synthesis parameters on the specific capacitance and revealed that the N-rGO sample prepared with 250 mg GO and 750 mg urea at 24-hour synthesis time in 80 ml dispersive solvent exhibited the highest specific capacitance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Correction
Construction & Building Technology
Smita Singh, M. U. Aswath, Rahul Das Biswas, R. V. Ranganath, Harish K. Choudhary, Rajeev Kumar, Balaram Sahoo
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Harish Kumar Choudhary, Rajeev Kumar, Shital Patangrao Pawar, Uttandaraman Sundararaj, Balaram Sahoo
Summary: In this study, carbonaceous materials were synthesized using a single-step pyrolysis method with metal acetylacetonates as precursors. The choice of precursor and synthesis temperature were found to influence the morphology and properties of the carbonaceous materials, particularly in relation to their effectiveness in electromagnetic interference shielding. Coated metallic nanoparticles were shown to significantly enhance the shield efficiency over insulating oxide particles.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Yanbin Wang, Xinyou Huang, Ziqiu Cheng, Penghui Chen, Yuyang Chen, Junhao Ye, Haohong Chen, Zhenzhen Zhou, Denis Yu Kosyanov, Jiang Li
Summary: Uniform Al2O3-Ce:LuAG composite phosphor ceramics (CPCs) with excellent luminescent properties and thermal stability have been successfully synthesized in this study, showing great potential for application in solid-state laser lighting.
Article
Materials Science, Multidisciplinary
Syed Muhammad Ali Zaidi, Mazhar Ali Kalyar, Zulfiqar Ali Raza, Aayesha Shoukat, Rubaila Waseem, Muhammad Aslam
Summary: Polyvinyl alcohol (PVA) nanocomposite strips embedded with graphene nanosheets and copper-ferrite nanoparticles were synthesized using solution casting technique. Laser pulse irradiations were then applied to modify the structural, optical, and electrical properties of the strips, showing potential for optoelectronic devices.
Article
Materials Science, Multidisciplinary
Yunru Chen, Jialing Wu, Jiajia Wang, Shihui Ma, Hongwei Yu
Summary: This paper investigates the angular non-critical phase-matching second-harmonic-generation properties of Ba3(ZnB5O10)PO4 crystal and explores its potential applications in the output spectral regions.
Article
Materials Science, Multidisciplinary
Qun Jing, Menglin Zhu, Lu Li, Xu Ji, Haiming Duan, Henglei Chen, Ming-Hsien Lee
Summary: The paper introduces two new nonlinear optical materials, MZnPO4 (M = Rb, Cs), synthesized by cation substitution. These materials exhibit a honeycomb-like structure and show mild SHG responses with short absorption edges. The thermal properties, IR spectra, and theoretical calculations of the materials are also discussed.
Article
Materials Science, Multidisciplinary
Camila Ianhez-Pereira, Akhil Kuriakose, Ariano De Giovanni Rodrigues, Ana Luiza Costa Silva, Ottavia Jedrkiewicz, Monica Bollani, Marcio Peron Franco de Godoy
Summary: This study aims to evaluate the crystalline changes induced by ultrafast laser micromachining on manganese oxide thin films using micro-Raman spectroscopy. The results show that laser-writing is effective in locally modifying low-crystallinity films and increasing crystallite sizes, highlighting an interesting approach to evaluate laser-induced structural modifications on metal oxide thin films.
Article
Materials Science, Multidisciplinary
Kamal Bansal, Neeraj Kumar Mishra, Ibrahim Abdullahi, Param Jeet Singh, Mohit Tyagi, Sukhpal Singh
Summary: A novel Sm3+ activated oxyfluoride glass was synthesized and its structure and properties were analyzed. The glass showed potential applications in lasers, optical temperature sensing, and high-energy scintillators.
Article
Materials Science, Multidisciplinary
Xingjian Wang, Zhixu Wu, Jiawei Zhu, Yubin Kang, Mengqiang Cai, Yong Xia, Hui Deng
Summary: Antimony sulfide (Sb2S3) has been investigated as a promising material for visible light photodetectors due to its non-toxicity, stability, and high absorption coefficient. In this study, we systematically explored the impact of key parameters on the performance of Sb2S3 devices using simulation and successfully fabricated self-powered photodetectors with high responsivity and specific detectivity. Furthermore, we demonstrated the application of the Sb2S3 detector in a scanning imaging system, showcasing its potential for developing new types of visible light detectors and imaging systems.
Article
Materials Science, Multidisciplinary
O. I. Sallam, R. M. Ahmed
Summary: The 20NaF-60P2O5-20Na2O fluorophosphate glass systems doped with 3 wt% of CoO and NiO were investigated for their optical parameters before and after gamma irradiation. The presence of defects within the glass network and the addition of transition metals were found to affect the properties of the composites. After irradiation, a red shift was observed in the dissipation factor spectrum. The energy lost at the surface of the composites was larger than the energy lost within the constituent materials. All investigated composites showed insulating behavior and exhibited increased nonlinear optical parameters after irradiation, with the CoO-doped composite showing the highest values.
Article
Materials Science, Multidisciplinary
Fahimeh Ahmadi, Zeinab Ebrahimpour, Asghar Asgari, Bao Van
Summary: In this study, Er3+-doped sulfophosphate glasses containing titanium nanoparticles (TiO2 NPs) and different concentrations of silver nanoparticles (AgNPs) were synthesized. The impact of AgNPs on the physical and structural characteristics, optical absorption and emission features, and photocatalytic activity of the glasses were investigated. The results showed that the addition of AgNPs enhanced the emission intensity of the glasses, with the system containing 0.04 mol% of AgNPs exhibiting optimal performance. Furthermore, the presence of AgNPs and TiO2 NPs in the glass matrix positively affected the photocatalytic performance.
Article
Materials Science, Multidisciplinary
Zhuang Li, Rongfei Huang, Wei Yuan, Shaoqiang Zheng, Wenlu Liao, Huiying Xu, Zhiping Cai
Summary: This study reports the first realization of an 868 nm Pr:YLF laser pumped by an InGaN blue laser diode. The laser achieved a maximum power of 641 mW with stable output and good beam quality. The experimental results were in agreement with theoretical simulations.
Article
Materials Science, Multidisciplinary
Bhishma Karki, Youssef Trabelsi, Amrindra Pal, Sofyan A. Taya, Ram Bharos Yadav
Summary: This study proposes an SF11 Prism- Ag- ZnO nanowires-CeO2-Sensing layer-based surface plasmon resonance sensor for measuring dopamine concentration in human blood. The sensor demonstrates high sensitivity and detection accuracy, and holds significant importance for early diagnosis of neurological diseases.
Article
Materials Science, Multidisciplinary
M. Taoufiq, A. Soussi, A. Elfanaoui, A. Ait Hssi, S. Baoubih, A. Ihlal, K. Bouabid
Summary: In this study, the effect of copper doping within ZnS on glass substrates was investigated through experimental and theoretical approaches. Pure ZnS and Cu-doped ZnS films with varying copper concentrations were deposited on glass substrates using the SILAR technique. The structural, morphological, and optical properties of the films were characterized, and the theoretical FP-LAPW method based on density functional theory was employed to study the properties of copper-doped ZnS.