Article
Materials Science, Ceramics
Alireza Ramezani, Hossein Abdizadeh, Mohammad Reza Golobostanfard
Summary: BaTiO3 and SrTiO3 thin films and BaTiO3/SrTiO3 lamellar composites were successfully synthesized using the sol-gel spin-coating method in this study. The morphology and band gap of the composite samples could be altered by changing the periodicity of the samples. The optical properties of the multi-stacked composites, including dielectric constant, dielectric loss, impedance, Urbach tail, extinction coefficient, and electric modulus, were also investigated.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Marin Cernea, Mihail Secu, Roxana Radu, Paul Ganea, Vasile Adrian Surdu, Roxana Trusca, Eugenia Tanasa Vasile, Elisabeta Corina Secu
Summary: The study synthesized polycrystalline Ba1-xTbxTiO3 materials and analyzed their photoluminescence and dielectric properties, revealing that increasing terbium content reduces Curie temperature and increases phase transition diffuseness. UV-vis reflectance spectra showed a decrease in band gap energy with higher Tb content, while photoluminescence spectra demonstrated terbium enhances photoluminescence accompanied by self-trapped exciton emission.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Shuangqian Ma, Zhongyang Wang, Lan Yang, Danning He, Ming Yang, Liping Tong, Xiao Zhou, Tongxiang Fan
Summary: This work systematically studied the solar-reflective and infrared-radiative properties of Sr-doped BaTiO3 ceramics. It was found that increasing Sr content led to higher infrared emissivity and solar absorptivity, with Ba0.8Sr0.2TiO3 achieving the lowest absorptivity-emissivity ratio. The optical properties of these ceramics remained stable even during heat-induced phase transition, indicating potential for improved radiative cooling performance.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Neha, Preeti Sharma, Vinod Kumar, Manoj Bhatnagar, Parveen Kumar, Chandra Prakash
Summary: Polycrystalline ferroelectric ceramics with compositional formula Ba0.70-xCa0.30SmxTi1-xFexO3 (BCSTF) were prepared by solid state reaction route and their properties were investigated. The results suggest that these ceramics have potential applications in areas such as capacitors, dielectric bolometers, and electrocaloric applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Wei Ziqin, Xia Xiang, Li Qin, Li Guorong, Chang Jiang
Summary: Developing a composite bioactive piezoelectric material that can generate electrical signals and induce mineralization and deposition is of great significance. In this study, barium titanate and calcium silicate were used to prepare a barium titanate/calcium silicate composite ceramic, which showed both piezoelectric properties and the ability to induce mineralization. This provides a new choice for bone repair materials.
JOURNAL OF INORGANIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
F. A. C. Nobrega, R. F. Abreu, D. da M. Colares, M. A. S. Silva, F. F. do Carmo, T. O. Abreu, J. P. C. do Nascimento, J. C. Sales, R. S. Silva, J. C. Goes, A. S. B. Sombra
Summary: This study focuses on the dielectric properties of BaMoO4 ceramic and BaMoO4-CTO composites in the microwave region. The addition of 20% CTO to BaMoO4 resulted in a composite with desirable relative dielectric permittivity and low dielectric loss. These materials can be used as dielectric resonator antennas.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Jie Wu, Gaochao Zhao, Chengbing Pan, Kun Tao, Jie Yang, Xuebin Zhu, Peng Tong, Lihua Yin, Wenhai Song, Yuping Sun
Summary: We investigated the effect of A-site disorder on the properties of lead-free Ba1-x-ySrxCayTiO3 perovskites and found that decreasing A-site disorder leads to reduced tetragonal distortion, ferroelectric transition temperature, and the temperature of the maximum electrocaloric effect. By optimizing the A-site disorder, the highest adiabatic temperature change can be achieved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Pooja Yadav, R. Prasada Rao, P. Abdul Azeem
Summary: The current study successfully synthesized nanostructured CaTiO3 powder using two modified sol-gel methods. The addition of leaf extract effectively reduced the particle size. Characterization techniques including XRD, FE-SEM, Rietveld refinement, FTIR, XPS, UV-Vis, and PL were used to confirm the nanometric particle size, crystalline structure, phase involvement, functional groups, elemental composition, and optical properties. The synthesized sample showed promising potential as a blue color phosphor for LED applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Amir Mahdi Molavi, Parvin Alizadeh
Summary: Multiferroic composite materials with one-dimensional core-shell structure were successfully synthesized by electrospinning for the first time, and the influence of different synthesis routes on the properties of the composite fibers was investigated, with the second method showing higher saturation magnetization and dielectric constant.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Ceramics
Xiaobo Luo, Ying Liu, Zhangwen Long, Songhan Hu, Shuai Yang, Dacheng Zhou, Qi Wang, Yong Yang, Yugeng Wen, Jianbei Qiu
Summary: The emerging challenges of the big data era require the development of next-generation optical data storage materials. This study presents a photo-stimulated luminescence material, Ba3Ga2O6: Pr3+, for rewritable optical storage and write-once-read-many data preservation. The material allows for data encoding/decoding under UV light and high-security write-once-read-many optical memory.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
K. T. Lee, R. A. M. Osman, P. Poopalan
Summary: BaTiO3:Eu3+ thin films were prepared by sol-gel spin coating method and their properties were studied at different temperatures. It was found that the films were amorphous at temperatures below 600 degrees Celsius and exhibited strong luminescence performance.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Metallurgy & Metallurgical Engineering
Jesse Nii Okai Amu-Darko, Chen Zhang, Shahid Hussain, Samuel Leumas Otoo, Michael Freduah Agyemang
Summary: The environmentally-friendly relaxor ferroelectric ceramics were prepared and sintered, with Ba(Mg1/3Ta2/3)O-3 content affecting grain size and dielectric properties. Increasing BMT content led to improved dielectric performance and transition from ferroelectric to paraelectric phase.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Nanoscience & Nanotechnology
Farnaz Safi Samghabadi, Long Chang, Mohammad Khodadadi, Karen S. Martirosyan, Dmitri Litvinov
Summary: In this study, cobalt ferrite/barium titanate particulate composites with high magnetoelectric coefficients were synthesized using mechanical ball milling and high-temperature annealing. The use of 50 nm cubic BaTiO3 powder as a precursor resulted in a composite with a magnetoelectric coupling coefficient value as high as 4.3 mV/Oe cm. The Microstructure of these composites differs significantly from those synthesized using 200 nm tetragonal BaTiO3 powder, showing larger CoFe2O4 grains and better electrical insulation due to the surrounding BaTiO3 matrix.
Article
Physics, Condensed Matter
Haolei Shen, Kui Xia, Peng Wang, Rongri Tan
Summary: Based on first-principles calculations, the electronic, structural, ferroelectric, and optical properties of (Ba0.875Sr0.125)(Zr0.125Ti0.875)O-3(BSZT) were investigated. The analysis showed that the crystal structure of BaTiO3 was distorted after doping with Sr and Zr, with different displacement magnitudes for Zr and Ti atoms. The ferroelectric properties could be attributed to the strong hybridization between Ti 3d, Zr 4d, and O 2p orbitals. The optical properties of BSZT exhibited a blue-shift and showed good optical response in the UV region, indicating potential applications in ceramic capacitors, resistors with high dielectric insulation, and optoelectronic devices.
SOLID STATE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Min Zhang, Joseph Falvey, Andrew L. Hector, Nuria Garcia-Araez
Summary: Nanocrystalline BaTiO3 was prepared via hydrothermal synthesis, and the effects of synthesis temperature and Ba/Ti precursor ratio on the material properties were explored. The results showed that the synthesis temperature and Ba/Ti precursor ratio significantly influenced the crystallite size and defect concentration of BaTiO3.
Article
Biochemistry & Molecular Biology
Pedro Simao Sousa Mendonca, Jeziel Rodrigues dos Santos, Osmair Vital de Oliveira, Jose Divino dos Santos, Elson Longo
Summary: Computational chemistry methods were used to study the potential of a silicon nanotube as a virucidal agent against COVID-19. The results showed that the nanotube had high reactivity and favorable binding energy with the receptor-binding domain of the SARS-CoV-2 spike protein.
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
(2023)
Article
Materials Science, Multidisciplinary
Roseli Kunzel, Carla M. Santos Feldhaus, Yanna Oliveira Fancio Suzuki, Fabio Furlan Ferreira, Vinicius Gomes de Paula, Lilia C. Courrol, Nancy K. Umisedo, Elisabeth Mateus Yoshimura, Emico Okuno, Ana Paula de Azevedo Marques
Summary: This study systematically investigates the effects of synthesis methodology and post-synthesis treatments on the optical and magnetic properties of SrMoO4 phosphors. The results show a direct relationship between sample order and optical properties. The magnetic properties of SrMoO4 compounds are influenced by the density and distribution of structural defects.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Marisa Carvalho de Oliveira, Marcelo Assis, Luiz Gustavo Pagotto Simoes, Daniel Tamassia Minozzi, Renan A. . P. Ribeiro, Juan Andres, Elson Longo
Summary: This research reveals the biocidal activity of SiO2-Ag composites, which can eliminate Staphylococcus aureus and SARS-CoV-2 virus in just 2 minutes. The material destroys the virus structure by generating reactive oxygen species, as predicted by first-principles calculations.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Meeting Abstract
Hematology
Johanna A. Kremer Hovinga Strebel, Javier de la Rubia, Katerina Pavenski, Ara Metjian, Paul Knoebl, Flora Peyvandi, Spero Cataland, Paul Coppo, Umer Khan, Laurel A. Menapace, Ana Paula Marques, Sriya Gunawardena, Marie Scully
Article
Environmental Sciences
Debora. F. Dos Santos, Anderson A. G. Santiago, Marcio D. Teodoro, Fabiana V. Motta, Mauricio R. D. Bomio
Summary: In this study, nanomaterials of the SrMoO4/g-C3N4 heterostructure were synthesized by the sonochemical method. The results showed the formation of heterojunctions, broadening of the wavelength absorption range, and a decrease in photoluminescence intensity. Photocatalytic tests demonstrated the high degradation efficiency of the nanomaterials towards organic contaminants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Materials Science, Multidisciplinary
L. X. Lovisa, D. F. Dos Santos, A. A. G. Santiago, M. Siu Li, E. Longo, M. R. D. Bomio, F. V. Motta
Summary: In this study, SrW(1-x)MoxO4 inorganic phosphors were synthesized using the microwave-hydrothermal method, and the changes in their structure and optical properties were observed. By adjusting the chemical composition, adjustable optical properties can be achieved, which is of great significance for the development of multifunctional materials.
Article
Chemistry, Physical
Laura O. Libero, Lara K. Ribeiro, Luis I. Granone, Maria S. Churio, Josiane C. Souza, Valmor R. Mastelaro, Juan Andres, Elson Longo, Lucia H. Mascaro, Marcelo Assis
Summary: This study reports on the immobilization of Fe-2(MoO4)(3) in chitosan films and its effect on the oxidation reaction of sulfide derivatives. The catalyst showed good yields and excellent selectivity, even tolerating oxidatively sensitive functional groups. The key success of the selective oxidation was attributed to the presence of hydroxyl radical, center dot OH, and the Fe3+/Fe2+ Fenton-like process. Additionally, the synergistic effect between Fe-2(MoO4)(3) and chitosan was demonstrated in the selective oxidation of sulfides to sulfones. This work provides a design strategy for efficient catalysts that can be applied to other semiconductors and oxidation processes.
Article
Optics
Ana Paula de Azevedo Marques, Nancy Kuniko Umisedo, Jessica Araujo Costa, Elizabeth Mateus Yoshimura, Emico Okuno, Roseli Kuenzel
Summary: In this study, the TL and OSL properties of SrMoO4 powders were investigated with different capping agents. Structural, optical, and morphological characteristics were analyzed using various techniques. TL and OSL glow curves were recorded, and the trapping depth energy and residual TL spectra were evaluated. The results demonstrate the dependence of TL and OSL signals on the structural properties, supporting the potential application of SrMoO4 powders as an OSL detector.
JOURNAL OF LUMINESCENCE
(2023)
Article
Nanoscience & Nanotechnology
Krishtappa Manjunatha, Hsin-Hao Chiu, Ming-Kang Ho, Tsu-En Hsu, Shih-Lung Yu, Chu-En Chin, Chia-Liang Cheng, Marisa Carvalho de Oliveira, Elson Longo, Renan A. P. Ribeiro, Hanumanthappa Nagabhushana, Sheng Yun Wu
Summary: By using the co-precipitate method, Mg-doped CoCr2O4 nanoparticles with controlled particle size were synthesized and their properties were investigated. The magnetic inhomogeneity of the nanoparticles was identified as the cause of the observed exchange bias effect. The nanoparticles showed potential applications in magnetic memory and magnetocaloric effect fields.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Ceramics
S. A. N. Franca Junior, W. Acchar, S. L. A. Dantas, P. H. Chiberio, H. P. A. Alves, M. R. D. Bomio, F. V. Motta, F. Bohn, A. Ferreira, F. Vaz, M. A. Correa
Summary: We conducted a comprehensive investigation on the high-frequency dielectric properties of (ZrO2)100-x(BaTiO3)x heterostructures. By adjusting the content of BaTiO3, we could modify the dielectric constant of the resulting ceramic sheets. Our results demonstrated successful fabrication of heterostructured ceramic sheets and the ability to tailor the electric, structural, and dielectric properties of both ZrO2 and BaTiO3 materials. Furthermore, the evolution of the dielectric constant could be manipulated according to specific technological applications.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
D. C. Amaral, L. S. R. Rocha, L. I. Granone, M. M. Lage, M. S. Churio, M. D. Sanchez, E. Longo, H. M. S. Nascimento, M. Assis, F. Moura, M. A. Ponce
Summary: The influence of manganese modification on the spectroscopic features of manganese-doped CeO2 systems synthesized by the microwave-assisted hydrothermal route and their correlation with the presence of O defective structures were verified. Raman and electron paramagnetic resonance studies confirmed the presence of defective clusters formed by dipoles and/or quadrupoles. The number of paramagnetic species was found to be inversely proportional to the doping concentration, resulting in an increase in the Mn2+ signal, likely due to the reduction of Mn3+ species after the interaction with CO. X-ray photoelectron spectroscopy data showed significant changes in the Ce3+ and Mn2+ configurations with the introduction of manganese modification, suggesting the formation of nonparamagnetic Ce4+ species and the persistence of paramagnetic Mn2+ species.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Guilhermina Ferreira Teixeira, Heitor Secco Seleghini, Wagner Benicio Bastos, Natalia Jacomaci, Bojan Stojadinovic, Zorana Dohcevic-Mitrovic, Flavio Colmati, Miguel Angel San-Miguel, Elson Longo, Maria Aparecida Zaghete
Summary: Na2Nb2O6•H2O fibers were synthesized using a microwave-assisted hydrothermal method and used as a precursor for obtaining NaNbO3 fibers with piezoelectric characteristics. The NaNbO3 fibers consist of a mix of antiferroelectric and ferroelectric orthorhombic phases. Piezoresponse force microscopy revealed that the fibers have regions with ferroelectric domains and regions with no ferroelectric characteristics.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
T. B. O. Nunes, M. D. Teodoro, M. R. D. Bomio, F. V. Motta
Summary: This study presents the synthesis and characterization of indium-doped calcium tungstate nanoparticles and investigates their photocatalytic and photoluminescent properties. The results indicate that samples with 8% In3+ ions show improved photocatalytic performance.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
L. X. Lovisa, T. B. O. Nunes, R. R. Y. O. V. Wilson, E. Longo, M. Daldind, M. R. D. Bomio, F. V. Motta
Summary: This study successfully synthesized zinc-doped Bi2WO6 and demonstrated its good degradation performance for methylene blue through photocatalytic tests. Doping with Zn2+ improved photoluminescence, but excessive Zn2+ concentration inhibited photocatalytic properties.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Roumanos Georges Dib Neto, Wagner Costa Macedo, Jose Diego Fernandes, Agda Eunice de Souza, Silvio Rainho Teixeira, Kleper de Oliveira Rocha, Elson Longo
Summary: Manganese oxides were synthesized via Microwave-Assisted Hydrothermal (MAH) method and characterized at different temperatures. The analysis results revealed the presence of five distinct phases and the occurrence of oxidation and reduction reactions. The chemical characterization indicated the presence of sodium ions, which can be used as intercalation compounds for energy storage device optimization.
MATERIA-RIO DE JANEIRO
(2022)
Article
Materials Science, Multidisciplinary
Honggyun Kim, Jamal Aziz, Vijay D. Chavan, Deok-kee Kim
Summary: Silicon nitride films were prepared using plasma enhanced chemical vapor deposition with different trap densities induced by adjusting the RF power ratio. It was found that the film's trap density was lowest under compressive stress and increased under tensile stress. This study has significant implications for the formation of durable nitride films in various electronic and optoelectronic applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Qiang Yu, Huwei Zhao, Yue Zhao
Summary: Zinc oxide thin films and Al-doped zinc oxide films were prepared and characterized in this study. The addition of Al ions was found to change the growth orientation, increase the grain size, and enhance the absorption intensity in the visible light region. Furthermore, the addition of Al ions also increased the forward current in the heterojunction.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Sang Woo Lee, Min Sun Park, Sangwon Wi, So Yeon Lim, Yeseul Lee, Jin-Seok Chung, Sang Mo Yang
Summary: In this study, we investigated the dynamics of domain switching in pristine and fatigued BiFeO3 capacitors through experimental observations and measurements. The results showed that the switching in the pristine capacitors was dominantly driven by domain growth, while the fatigued capacitors exhibited two different switching dynamics, in which nucleation played a critical role.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Boshi Wang, Tianyi Wang, Yufang Liu, Kun Yu
Summary: In this paper, a tunable and anisotropic perfect absorber composed of anisotropic black phosphorus (BP) and isotropic graphene is proposed. The structure exhibits high absorption and strong anisotropic plasma response. The resonance characteristics can be effectively controlled by adjusting geometric parameters and doping levels, offering potential applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xiaolan Liu, Chunyang Li, Tonghui Yang, Naiqiang Yin, Gangling Zhao
Summary: Water drop triboelectric nanogenerators (WD-TENGs) can harvest energy from raindrops and improve the output performance of TENGs.
CURRENT APPLIED PHYSICS
(2024)
