Article
Chemistry, Physical
Saran Srihari Sripada Panda, Suman Gandi, Saidi Reddy Parne, Trilochan Panigrahi, Vijeesh Vadakke Parambil
Summary: The advancement of technology has allowed us to create increasingly sophisticated materials, and it plays a crucial role in the development of Radar Absorbing Materials (RAMs). This study presents a bio-inspired ZnO/Fe2O3/ZnFe2O4 heterostructure with excellent microwave absorption properties, achieved through a cost-effective method using Ramphal leaf extract.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
M. Fuentes-Perez, M. Sotelo-Lerma, J. L. Fuentes-Rios, Eric G. Morales-Espinoza, Manuel Serrano, M. E. Nicho
Summary: In this study, Fe3O4@ZnFe2O4 core/shell nanoparticles were prepared by depositing ZnO on Fe3O4 nanoparticles seeds obtained by the chemical bath deposition method. Characterization techniques showed that Fe3O4@ZnFe2O4 had higher crystallinity and specific crystal structures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Nitika, Anu Rana, Vinod Kumar
Summary: The study found that with increasing annealing temperature, the crystallinity, grain size, optical bandgap energy, saturation magnetization, and electrical conductivity of ZnFe2O4 nanoparticles all increased. In terms of humidity sensing properties, nanoparticles annealed at 700 degrees Celsius exhibited the best humidity sensitivity.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Zijian Liao, Mingliang Ma, Zhouyu Tong, Rongzhen Wang, Yuxin Bi, Yan Chen, Kwok L. Chung, Yong Ma
Summary: In this study, ZnFe2O4/C@PPy composites were prepared and showed excellent electromagnetic wave absorption performance, mainly attributed to dielectric loss and ideal impedance matching. The composites have great potential application as high-efficient absorption materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yao Xiao, Zhen Zhang, Zhao Ma, Guangxue Zhang, Chuanqi Feng
Summary: ZnFe2O4/C nanofibers were successfully synthesized using electrospinning method combined with heat treatment, and their electrochemical performances in lithium ion batteries were investigated. The results demonstrated high specific capacities and excellent cycle stability, indicating the potential of ZnFe2O4/C as an anode material for lithium ion battery applications.
Article
Materials Science, Multidisciplinary
Dimpal Tomar, P. Jeevanandam
Summary: In this study, zinc ferrite nanoparticles with various morphologies were synthesized by thermal decomposition of Zn-Fe glycolates prepared under different synthetic conditions. The nanoparticles were characterized using different analytical techniques and their magnetic properties were investigated.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Shipra Choudhary, Dilruba Hasina, Mahesh Saini, Mukesh Ranjan, Satyabrata Mohapatra
Summary: ZnFe2O4-ZnO heterojunction photocatalysts were successfully fabricated using a simple co-precipitation method, showing superior photodegradation performance and stability for large-scale photocatalytic applications. The efficient sunlight utilization ability and suppression of recombination of charge carriers contribute to the improved photocatalytic performance of the ZnFe2O4-ZnO nanostructures. (C) 2021 Elsevier B.V. All rights reserved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Mechanical
Bo Wu, Hui Song, Qiangqiang Zhang, Xianguo Hu
Summary: This study focused on the effect of microstructures of carbon microspheres on tribological behaviors, by preparing ZnFe2O4@C microspheres and investigating their tribological properties and lubrication mechanism as lubricant additives. It was found that the gradual occurrence of curved graphite and fullerene-like structure in the microspheres, as well as the formation of tribofilms with some graphite structure during rubbing process, contributed to the excellent tribological properties of the microspheres.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Physics, Multidisciplinary
Sana Ullah Asif, Qasim Ali Ranjha, Ubaid-ur-Rehman Ghori, Basmah H. Alshammari, Fahim Ahmed, Usman Nawaz, Fatma A. Ibrahim, Mohamed S. Hamdy
Summary: The effect of sintering temperature on the structural and magnetic properties of BaFe9.95Al2Mg0.05O19 M-type hexagonal Ba-hexaferrites was investigated. The results showed that as the sintering temperature increased, the saturation magnetization and remanence ratio initially increased, then decreased at higher temperatures, while the coercivity and magnetocrystalline anisotropy field decreased first, then increased. The optimal magnetic properties were achieved at a pre-sintering temperature of 1280 degrees C.
Article
Engineering, Electrical & Electronic
Shipra Choudhary, Aditi Bisht, Manas Kumar Dalai, Satyabrata Mohapatra
Summary: Spinel ferrite ZnFe2O4 nanostructures were synthesized as sunlight responsive photocatalysts using a co-precipitation method. The nanostructures showed superior photocatalytic activity in degrading organic pollutants due to their optimal crystallite size, narrower band gap, and improved sunlight utilization efficiency, making them potential candidates for the treatment of contaminated water.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
A. V. Ravindra, Shaohua Ju
Summary: Cobalt ferrite (CoFe2O4) nanoparticles with a size of 7-20 nm were easily synthesized by a microwave-hydrothermal route at temperatures of 100, 150, and 200 degrees C. The synthesized nanoparticles exhibited a pure spinel CoFe2O4 phase, high thermal stability, and a spherical morphology. The magnetic properties of the nanoparticles varied with synthesis temperature/particle size, with an increase in MS value and a decrease in Mr and Hc values as the temperature increased. The findings of this study provide insights into tailoring the properties of CoFe2O4 nanoparticles for specific applications using microwave-hydrothermal synthesis.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Doha M. Sayed, Kholoud E. Salem, Nageh K. Allam
Summary: By directly growing sub-100 nm Zr-doped orthorhombic Nb2O5 nanotube films, the pseudocapacitive performance is enhanced, resulting in a nanostructured thin film suitable for negative supercapacitor electrode materials with excellent electrochemical performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Manijeh Shaterian, Alireza Rezvani, Ahmad Reza Abbasian
Summary: The study successfully synthesized magnetic zinc ferrite sub-microparticles using a PDDA-assisted solvothermal method. The addition of PDDA increased the zeta potential and improved the colloidal stability of the particles. The reaction conditions and different amounts of PDDA influenced the size, morphology, magnetic properties, and surface area of the sub-microparticles.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Environmental Sciences
Qi Wang, Fang Zhu, Hao Cheng, Sridhar Komarneni, Jianfeng Ma
Summary: In this study, Ti3C2 MXene modified ZnFe2O4 nanocomposite materials were prepared for photocatalytic degradation of tetracycline under visible light. The Ti3C2 MXene was uniformly distributed on the ZnFe2O4 surface in the form of quantum dots. The ZnFe2O4/MXene-15% catalyst achieved 87% degradation efficiency of tetracycline within 60 min when coupled with persulfate system under visible light. The experimental results also indicated that the pH of the solution, persulfate dosage, and co-existing ions were important factors affecting the oxidation process.
Article
Materials Science, Ceramics
Hossein Minouei, Maisam Jalaly, Mehdi Kheradmandfard, Mohsen Saboktakin Rizi, Dae-Eun Kim, Sun Ig Hong
Summary: In this study, a novel microwave-assisted method was developed to synthesize high-entropy oxide (HEO) nanoparticles. By varying the composition (Cr0.2Fe0.2Mn0.2Co0.2-xNi0.2Znx)3O4 (x = 0, 0.05, 0.1, and 0.2), nanoparticles with uniform distribution of metallic elements and particle sizes ranging from 10 to 50 nm were obtained. The suggested methodology is an excellent synthesis method due to its advantages of ultrafast, low-temperature fabrication of nanoscale and high-purity products at a relatively low cost.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Ashok Bansiwal, Sushil Raina, K. J. Vinoy, Subrata Kumar Datta
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2019)
Article
Engineering, Electrical & Electronic
Gladwin Jos Kurupasseril Tomy, Kalarickaparambil Joseph Vinoy
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2019)
Article
Engineering, Electrical & Electronic
Ashok Bansiwal, Sushi Raina, K. J. Vinoy, Subrata Kumar Datta
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2020)
Article
Engineering, Electrical & Electronic
Gladwin Jos Kurupasseril Tomy, Kalarickaparambil Joseph Vinoy
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2020)
Article
Multidisciplinary Sciences
Ashok Bansiwal, Sushil Raina, K. J. Vinoy, Subrata Kumar Datta
Summary: An improved analytical formulation has been proposed for calculating the cavity gap-capacitance of reentrant cavities with single and multiple beam-tunnels. The results show that the proposed formulation provides a good estimation of the resonant frequency of cavities with single and multiple beam-tunnels.
DEFENCE SCIENCE JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
R. Kiran, Kalarickaparambil Joseph Vinoy
Summary: A time-domain stochastic radial point interpolation method is developed for uncertainty quantification of electromagnetic systems, with validation and comparison showing significantly better computation time compared to Monte Carlo and stochastic collocation methods. The method is shown to perform well even for large variations in the model.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
K. T. Jos Gladwin, K. J. Vinoy
Summary: This letter proposes a proper orthogonal decomposition method as a fast uncertainty quantification approach for electromagnetic systems. It can efficiently handle a large number of stochastic parameters without any restriction on the levels of variations. The performance of the method is evaluated in a frequency domain stochastic EM problem with permittivity variations, showing a computational time increase of only 15% even with a fivefold increase in stochastic variables.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Abhijith B. Narendranath, Kalarickaparambil Joseph Vinoy
Summary: The study proposes a novel approach to enhance the robust design of microwave components and structures by incorporating manufacturing process tolerances, reducing production costs. By analyzing dimensional uncertainty in 3-D microwave models, the research validates the effectiveness and accuracy of the proposed method, providing new insights for addressing challenges in the manufacturing process.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Computer Science, Interdisciplinary Applications
Kurupasseril Tomy Jos Gladwin, Kalarickaparambil Joseph Vinoy
Summary: This paper investigates the spatial variations in material properties caused by fabrication tolerance in electromagnetic systems. The variations are modeled using Karhunen-Loeve expansion and quantified using a spectral stochastic finite element method based on intrusive polynomial chaos expansion. A numerical example demonstrates the accuracy and computational efficiency of the proposed approach for stochastic response analysis. The impact of correlation length of the covariance function used in the spectral expansion is also analyzed.
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Aritra Roy, K. J. Vinoy, Noham Martin, Stephane Mallegol, Cedric Quendo
Summary: Low-profile wideband spiral antennas face challenges with impedance matching, cross polarization and gain variation at different frequencies. This paper addresses these issues by designing the conductor profile and proposes a geometry that exhibits good performance. Numerical investigations and experimental characterization show that the proposed antenna achieves excellent impedance matching and circular polarization behavior at most frequencies.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Gouranga Dhaundia, K. J. Vinoy
Summary: This letter proposes a method to improve the gain and maintain the bandwidth of a suspended substrate microstrip patch antenna. By folding the ground plane upwards to form sidewalls parallel to the nonradiating edges, the radiation performance of the antenna is maximized. The approach achieves a peak gain better than 12 dBi and an impedance bandwidth of around 45%. Simulation studies show that sidewalls parallel to the radiating edges degrade the antenna performance.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
K. T. Jos Gladwin, K. J. Vinoy
Summary: In this article, a low-dimensional basis is developed using proper orthogonal decomposition (POD) in order to efficiently approximate the problem using polynomial chaos expansion (PCE)-based spectral stochastic finite-element method (SSFEM) for uncertainty quantification (UQ). The proposed method for an electromagnetic (EM) problem with variations in relative permittivity in multiple dielectric regions is computationally efficient, produces accurate results across a wide range of frequencies with a single computation, and has a significantly lower memory requirement.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Aritra Roy, K. J. Vinoy, Noham Martin, Stephane Mallegol, Cedric Quendo
Summary: A wideband absorbing metasurface is proposed to improve the circularly polarized response of a 1-18 GHz low-profile Archimedean spiral antenna. The metasurface consists of surface-mounted resistors between metallic patches in a circular arrangement, placed on the opposite side of the antenna substrate. The designed metasurface absorbs edge-reflected waves and enhances the antenna's circularly polarized response below 6 GHz, with measured performance showing improved gain and axial ratio.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Aritra Roy, Yalagala Naresh, Ashwin Padmanabhan, Ananthanarayanan Chockalingam, K. J. Vinoy
Summary: This paper introduces an electromagnetic window with a digitally reconfigurable metasurface for demonstrating media-based modulation, a multipath-based communication technique. By modulating the amplitude and phase of transmitted tones in space using different switching combinations, the system shows improved signal-to-noise ratio, bandwidth, and energy efficiency for enhanced security in multiuser systems.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Chemistry, Multidisciplinary
Pritom J. Bora, Irthasa Azeem, K. J. Vinoy, Praveen C. Ramamurthy, Giridhar Madras
