Article
Chemistry, Physical
Rusiri Rathnasekara, Grant Mayberry, Parameswar Hari
Summary: In this study, the thermoelectric, electrochemical, and dielectric properties of four different ZnO morphologies were investigated. ZnO nanorods exhibited the most favorable properties in terms of thermoelectric, electrochemical, and dielectric performance.
Article
Engineering, Electrical & Electronic
N. D. Pandya, J. H. Joshi, H. O. Jethva, M. J. Joshi
Summary: The study investigated the effects of different mol% Ni2+ doping on the properties of potassium dihydrogen citrate (KDC) crystals, including crystal morphology, crystal symmetry, lattice strain, thermal stability, grain growth, transport properties, and dielectric properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Gulzar Ahmad Lone, Mohd Ikram
Summary: This study investigates the structural and dielectric properties of pristine and Ni-doped spinel CoFe2O4. The samples were synthesized using a solid-state reaction approach, and the structural analysis confirmed a single-phase FCC cubic spinel structure. The cationic distribution revealed changes in occupancy due to doping. SEM and EDS were used for microstructural and elemental composition analysis. The study found the presence of orientational and interfacial polarization in the samples. The dielectric constant showed a temperature-dependent behavior, with an increase observed after reaching a certain temperature. CoFe1.9Ni0.9O4 exhibited low dielectric loss and strong relaxation behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Busra Altun, Ahmad Ajjaq, Ali Orkun Cagirtekin, Irmak Karaduman Er, Fatma Sarf, Selim Acar
Summary: In this study, pure zinc oxide and lightly cadmium doped zinc oxide films were synthesized by chemical bath deposition to investigate the impact of Cd doping ratio and temperature on their electrical and dielectric properties. The results demonstrated the critical effect of temperature and Cd doping ratio on the electrical and dielectric properties of ZnO films, with Cd doping significantly affecting the properties below 500 K.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Hicham Mahfoz Kotb, Hassan A. Khater, Osama Saber, Mohamad M. Ahmad
Summary: NSCTO ceramics were prepared by reactive sintering solid-state reaction, and the influence of sintering temperature on structural and dielectric properties was thoroughly studied. The ceramic sample sintered at 1025 degrees C showed the best compromise between colossal relative permittivity and low dielectric loss values.
Article
Chemistry, Physical
Bappa Sona Kar, M. N. Goswami, P. C. Jana
Summary: La2O3-substituted polycrystalline 0.56BiFeO(3)-0.44BaTiO(3) ceramics were prepared via conventional solid-state reaction process, with investigations on crystal structure, dielectric, magnetic, and impedance properties. La substitution enhanced the multiferroic nature of the materials, as evidenced by improved energy storage density and remnant magnetization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Crystallography
Mohamad M. Ahmad, Hicham Mahfoz Kotb, Celin Joseph, Shalendra Kumar, Adil Alshoaibi
Summary: La2/3Cu3Ti4O12 (LCTO) powder was synthesized using the mechanochemical milling technique and sintered at lower temperatures compared to standard solid-state reactions. The sintered ceramics exhibited a cubic phase structure with increasing grain size at higher sintering temperatures. Impedance results indicated higher grain conductivity compared to grain boundary conductivity, contributing to the giant dielectric constant observed in the samples.
Article
Materials Science, Ceramics
Hai Jiang, Ning Ding, Zheng-Yu Zou, Xiao-Hong Wang
Summary: The effect of ZnO on the phase composition, microstructure, thermal and dielectric properties of AlN ceramics was studied. Suitable addition of ZnO can effectively increase the thermal conductivity and alter the dielectric properties of AlN ceramics, while excessive addition leads to a decrease in thermal conductivity and electrical resistivity.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2022)
Article
Materials Science, Multidisciplinary
H. F. Abosheiasha, Diaa-Eldin A. Mansour, M. A. Darwish, S. T. Assar
Summary: Until recently, multifunctional epoxy nanocomposites (MENCs) have attracted the attention of researchers due to their tunable properties. This study focuses on epoxy/Li0.5Al0.35Fe2.15O4/Al2O3 nanocomposites with varying Al2O3 content. The samples were characterized and it was found that increasing the Al2O3 nanofillers enhances thermal conductivity but decreases thermal stability. The samples also exhibit soft ferrimagnetic behavior. The study explains the interesting results of decreasing electrical conductivity and dielectric properties for the composite samples based on a dual interface nanolayer model.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Ceramics
O. Rosales-Gonzalez, F. Pedro-Garcia, F. Sanchez-De Jesus, A. Barba-Pingarron, M. Ramirez-Cardona, A. M. Bolarin-Miro
Summary: The dielectric study of yttrium orthoferrite YFeO3 revealed temperature-frequency dependence of dielectric relaxation processes. The material exhibited orthorhombic crystal structure and weak ferromagnetic behavior. Two relaxation processes at different temperature ranges were identified, with activation energies corresponding to single and doubly ionized oxygen vacancies. The dominant conduction mechanism was found to follow the Jonscher power law, indicating a hopping model in the material.
CERAMICS INTERNATIONAL
(2021)
Review
Materials Science, Multidisciplinary
Fiaz Ahmad, Asghari Maqsood
Summary: A low-cost and low-temperature co-precipitation process was used to synthesize zinc oxide (ZnO) nanoparticles, which were characterized using various techniques at room temperature. The study also reported the electrical properties, dielectric parameters, and complex impedance spectra at low temperatures, revealing the conduction mechanism in ZnO nanoparticles as the Correlation Barrier Hopping (CBH) mechanism.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Falguni Bhadala, Lokesh Suthar, M. Roy
Summary: Polycrystalline ceramic samples of BiFe1-xZnxO3 were prepared by sol-gel synthesis method, and characterized by X-ray analysis, Rietveld analysis, and atomic force microscopy for surface morphology. The study also investigated dielectric parameters, electrical modulus, activation energies, thermal stability, and FTIR spectra to explain the material properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
M. M. Rahman, N. Hasan, M. A. Hoque, M. B. Hossen, M. Arifuzzaman
Summary: In this study, a series of nanocrystalline materials were synthesized using the sol-gel auto combustion technique, and the substitution effect of the Al3+ content on the structural, morphological, dielectric, and electrical properties of the nanoparticles was analyzed. The study found that the synthesized nanoparticles had a high crystalline nature and homogeneity. The contribution of grains and grain boundaries to the material properties was resolved, and the variation of AC resistivity with frequency was explained by the hopping mechanism.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Punnarao Manchi, Sontyana Adonijah Graham, Harishkumarreddy Patnam, Mandar Vasant Paranjape, Jae Su Yu
Summary: This study investigated the method of enhancing the electrical output performance of nanogenerators using composite polymeric films, and by fabricating a piezo/triboelectric hybrid nanogenerator, the performance metrics such as voltage, current, charge density, and power density were improved.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Ceramics
C. Murugesan, K. Ugendar, L. Okrasa, Jun Shen, G. Chandrasekaran
Summary: In this study, nanocrystalline Mn-Zn ferrites were synthesized through a solvent-free combustion reaction method and characterized using various techniques. The results showed that Zn substitution affects the crystallite size and electrical properties of the samples, but does not significantly alter the ionic states. The Zn-substituted manganese ferrite nanoparticles hold promise for high-frequency electronic device applications.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Aman Joshi, Prakash Chand
Summary: The bismuth phosphate (BiPO4) nanostructures prepared using a simple microwave technique exhibit excellent electrochemical performance, showing high specific capacity and cycle stability. The microwave irradiation power rate plays a crucial role in determining the performance of the BiPO4 nanostructures.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Praveen Kumar, Prakash Chand
Summary: The substitution of Ce3+/Ce4+ ions enhanced the photocatalytic degradation capabilities and strain memory effects of Bi1-xCexFeO3 nano ferrites, leading to increased degradation efficiencies for MB dye and Malathion pesticide under visible light.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Aman Joshi, Prakash Chand
Summary: Bismuth phosphate nanostructures were synthesized using a microwave approach at different pH values, and their optical and electrochemical energy storage behavior was investigated. The pH value had a significant influence on the optical band energy, and the sample synthesized at pH 7 exhibited excellent electrochemical performance.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Physical
Manpreet Kaur, Prakash Chand, Hardeep Anand
Summary: This study evaluated the impact of annealing temperature on the electrochemical characteristics of nickel cobaltite nano/microstructures. The results showed that the sample calcined at 500 degrees C had the highest specific capacity and is suitable as an electrode material for supercapacitors.
Article
Energy & Fuels
Manpreet Kaur, Prakash Chand, Hardeep Anand
Summary: The present study demonstrates a binder-free electrodeposition technique to produce NiCo(2)O(4) electrodes, which exhibit high specific capacitance and good cycle stability. The results open up new possibilities for the practical application of NiCo2O4 as an energy storage material.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Inorganic & Nuclear
Aman Joshi, Prakash Chand, Sunaina Saini
Summary: In this study, pure and alkali metal doped bismuth phosphate nanostructures were synthesized using the microwave method, and their electrochemical behavior was analyzed. The results showed that doping elements play a significant role in tuning the electrochemical property of working electrodes.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Aman Joshi, Prakash Chand, Sunaina Saini
Summary: In this study, the electrochemical behavior of doped bismuth phosphate nanostructures with rare earth elements (La, Ce, and Sm) synthesized using a hydrothermal route was analyzed. The results showed that the doping elements played a significant role in tuning the electrochemical properties of the working electrodes. Among them, Sm-doped bismuth phosphate nanostructures exhibited the highest specific capacity and cycle stability. These findings suggest that Sm-doped bismuth phosphate nanostructures have great potential for practical utility in energy storage applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Kajal Samdhyan, Prakash Chand, Hardeep Anand
Summary: This study reports a facile hydrothermal method for effective phosphorus doping in copper sulphides, which modifies the physicochemical characteristics of transition metal sulfides. The synthesized P-CuS exhibits hexagonal topology and high specific capacitance. An asymmetric supercapacitor device utilizing P doped copper sulfide as a positive electrode achieves high energy density and power density, with good sustainability over cycles. This research provides insights into the development of electrode materials for future energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Swati Sharma, Prakash Chand
Summary: In this study, Zeolitic Imidazolate Framework-8 (ZIF-8) was synthesized using a simple solvothermal method at room temperature. The synthesized ZIF-8 exhibited a cubic phase structure with a narrow mesoporous morphology. Electrochemical analysis showed that ZIF-8 as an electrode material demonstrated battery-type redox behavior and achieved a high specific capacity of 637.5 C/g. Furthermore, an asymmetric supercapacitor (ASSC) device was constructed using graphene nanoplatelets (GNPs) as the negative electrode and pure ZIF-8 as the positive electrode, which exhibited remarkable energy density and capacitance retention after multiple charge-discharge cycles.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Physics, Condensed Matter
Dinesh Kumar, Prakash Chand
Summary: The effect of Ti doping on the structural, electronic, optical and thermoelectric properties of NbRuP alloy was studied using density functional theory. The doped compound showed metallic behavior with high refractive index, making it suitable for optoelectronic and solar cell applications. Furthermore, the Ti doping increased the electrical conductivity and power factor of the alloy, making it a potential candidate for thermoelectric energy applications.
SOLID STATE COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Swati Sharma, Prakash Chand
Summary: Energy storage is crucial for meeting global and economic needs. Supercapacitors have emerged as promising candidates for energy storage applications due to their exceptional properties. This review article provides an overview of supercapacitors, including their differences from fuel cells, capacitors, and batteries, as well as detailed explanations of their fabrication, electrode materials, electrolytes, and characterization techniques. The article also discusses current issues and potential solutions for future development.
RESULTS IN CHEMISTRY
(2023)
