Article
Environmental Sciences
M. L. Aruna Kumari, L. Gomathi Devi, Gilberto Maia, Tse-Wei Chen, Nabil Al-Zaqri, M. Ajmal Ali
Summary: TiO2, ZnO, and SnO2 metal oxides were synthesized and heterojunctions were fabricated by combining TiO2 with either ZnO or SnO2 in a 1:1 ratio using mechanochemical ball milling process. The ternary heterojunctions showed enhanced photocatalytic activity, with TiO2(A)/TiO2(R)/ZnO heterojunction attributed to the formation of Ti3+-V-o defect states leading to efficient charge carrier separation. The ball milling process resulted in severe crystal deformation in TiO2 and ZnO lattices, creating crystal lattice distortion and defects due to valency mismatch between Ti4+ and Zn2+.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Christopher L. Rom, Rebecca W. Smaha, Celeste L. Melamed, Rekha R. . Schnepf, Karen N. Heinselman, John S. Mangum, Sang-Jun Lee, Stephan Lany, Laura T. Schelhas, Ann L. Greenaway, James R. . Neilson, Sage R. Bauers, Adele C. Tamboli, Jennifer S. Andrew
Summary: We predict and realize a new magnetic and semiconducting material, MnSnN2, through combinatorial sputtering of thin films. MnSnN2 exhibits a wide composition tolerance, with a single-phase region of 20% < Mn/(Mn + Sn) < 65%. The material shows a wurtzite-like crystal structure with cation disorder and has an optical absorption onset of 1 eV, consistent with the computationally predicted 1.2 eV bandgap. Resistivity and Hall effect measurements confirm the semiconducting nature of MnSnN2 and reveal complex charge transport mechanisms. Magnetic susceptibility measurements show a low-temperature magnetic ordering transition and strong antiferromagnetic correlations in MnSnN2, contrasting with previous studies on cation-ordered MnSiN2 and MnGeN2.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Annina Moser, Olesya Yarema, Gregorio Garcia, Mathieu Luisier, Filippo Longo, Emanuel Billeter, Andreas Borgschulte, Maksym Yarema, Vanessa Wood
Summary: This paper investigates the synthesis and electronic structure of colloidal Cu x SbSe4 nanocrystals through experiment and theory. It is found that the wider the band gap of Cu x SbSe4 nanocrystals, the more Cu-vacancies exist, which is confirmed by FTIR spectroscopy. The study also reveals that Sb(Cu) antisite defects can create mid-gap states, leading to sub-bandgap absorption. This work provides a comprehensive study of the characteristics of Cu x SbSe4 nanocrystals and highlights the potential opportunities and challenges for their application in infrared devices.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Martin Moebs, David A. Dixon, Gabriel F. de Melo, Monica Vasiliu, Tim Graubner, Karl O. Christe, Florian Kraus
Summary: The purely chemical synthesis of fluorine, previously believed to be impossible, was achieved in 1986 but has not been further studied since then. The mechanism of this reaction has been a mystery until recently, when it was experimentally resolved and supported by electronic structure calculations. These findings clarified the previous discrepancy and showed that the reductive elimination of F-2 requires a large excess of SbF5, occurring in the last reaction step.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Xiaoyu Song, Sarah N. Schneider, Guangming Cheng, Jason F. Khoury, Milena Jovanovic, Nan Yao, Leslie M. Schoop
Summary: This study investigates the mechanism of oxidative deintercalation of KCrSe2, revealing that the solid-state diffusion of K+ cations is the rate-limiting step in the process. Additionally, the relationship between Cr-Cr distances and magnetic order changes suggests the possibility of switching between magnetic states in CrSe2 monolayers by varying lattice parameters.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Zhi-Cheng Wang, Kulatheepan Thanabalasingam, Jan P. Scheifers, Alenna Streeter, Gregory T. McCandless, Jonathan Gaudet, Craig M. Brown, Carlo U. Segre, Julia Y. Chan, Fazel Tafti
Summary: The crystal structure and magnetic properties of a new copper tellurite sulfate compound were analyzed, suggesting it as a promising alternative to layered perovskites for future experiments aiming to tune the Mott insulating ground state into superconducting or spin liquid states.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Wenwu Zhou, Jianyong Ye, Zheng Liu, Lizhong Wang, Long Chen, Sheng Zhuo, Yue Liu, Weifan Chen
Summary: Novel transition metal ion-substituted Zn(1-x)A(x)WO(4) inorganic pigments with blue, yellow, brown, and pale green colors were successfully prepared using a solution combustion method, showing extremely high near-infrared reflectance. These pigments incorporate transition metal ions into the ZnWO4 lattice without altering its initial structure, leading to d-d transition and metal-to-metal charge transfer, resulting in bright colors and excellent thermal and chemical stability. The analysis results provide design strategies for colorful inorganic pigments with high near-infrared reflectance.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Wenwu Zhou, Jianyong Ye, Zheng Liu, Lizhong Wang, Long Chen, Sheng Zhuo, Yue Liu, Weifan Chen
Summary: This article describes a method for preparing colorful inorganic pigments using transition metal ion-substituted zinc tungstate, which have high near-infrared reflectance, excellent thermal and chemical stability, and a wide range of colors.
INORGANIC CHEMISTRY
(2022)
Article
Optics
Masanori Fujiwara, Shunsuke Inoue, Shin-ichiro Masuno, Haining Fu, Shigeki Tokita, Masaki Hashida, Norikazu Mizuochi
Summary: Recently, the creation of nitrogen-vacancy (NV) centers using ultrashort laser processing has gained attention for quantum information devices. This study demonstrates the creation of high-density NV centers in a wide region using a single intense femtosecond laser pulse, which is important for quantum sensing applications. The technique allows for the expansion of the region containing NV centers and has the potential to fabricate ultrahigh-sensitivity quantum sensors.
Article
Chemistry, Multidisciplinary
Felix Hansen, Rico Fucke, Titouan Charvin, Samuel Froeschke, Daniel Wolf, Romain Giraud, Joseph Dufouleur, Nico Graessler, Bernd Buechner, Peer Schmidt, Silke Hampel
Summary: This study proposes a method for the synthesis of mixed crystals of bismuth and antimony tellurides, which belong to the V2VI3 material family. The ideal synthesis conditions were determined through thermodynamic calculations and optimization experiments. The synthesized nanosheets exhibit high crystallinity and quality, with a significantly reduced carrier density compared to the binary compounds.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Rajagopalan Krishnan, Govind B. Nair, Samvit G. Menon, Lucas Erasmus, Hendrik C. Swart
Summary: A series of Tm2-xWO6:xEr(3+) phosphors were successfully synthesized by solid-state reaction method. The X-ray diffraction patterns confirmed the monoclinic crystalline structure of the as-synthesized materials. Increasing the doping concentration of Er3+ ions enhanced the upconversion luminescence intensity at 657 nm.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Mykhaylo Alekseychuk, Philipp Heretsch
Summary: This study discusses the formation mechanism of the anthrasteroid rearrangement and provides experimental evidence through chemical emulation from a plausible biogenetic precursor. The formation of asperfloketals A and B is shown to be achieved through double Wagner-Meerwein rearrangements, resulting in 1(10-*5),1(5 -*6)- and 1(10-*5),4(5-*6)diabeo-14,15- secosteroids, respectively. An efficient route to a bioinspired precursor is established by a sequence of orchestrated oxidative activation and rearrangement from ergosterol.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
Xun Kang, Alexei A. Belik, Yoshihiro Tsujimoto, Kazunari Yamaura
Summary: Under high-pressure and high-temperature conditions, doped Bi3Re3O11 and Bi3Re3O11 with Fe up to 29 atomic % were synthesized. The crystal structures and chemical compositions of Bi3Os2.45Fe0.55O11 and Bi3Re2.13Fe0.87O11 were determined by synchrotron powder X-ray diffraction and electron probe microanalysis. Both materials showed magnetic and electronic transport properties, indicating their potential for spintronic devices.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Qiuyuan Feng, Zhixia Gao, Ketian Hou, Jialong Wang, Hong Du, Qun Jing
Summary: Two new selenites, compound 1 and compound 2, were successfully synthesized by solid-state reactions. Compound 1 has a three-dimensional structure with [SeO3] triangular pyramids and [ZnO4] tetrahedra, while compound 2 has a two-dimensional layer structure composed of [SeO3] triangular pyramids, [ZnO4] tetrahedra, and [V4O13] tetrahedra.
DALTON TRANSACTIONS
(2023)
Article
Biochemistry & Molecular Biology
Ji Deng, Ze-Min Liu, Kai-Rong Zhu, Gui-Ling Cui, Lin-Xia Liu, Yu-Hang Yan, Xiang-Li Ning, Zhu-Jun Yu, Guo-Bo Li, Qing-Rong Qi
Summary: SIRT5 has important roles in physiological processes and human diseases, including cancer. The development of highly potent and selective SIRT5 inhibitors is still necessary for studying disease-related mechanisms and therapeutic potential. In this study, new e-N-thioglutaryllysine derivatives were designed and tested for their SIRT5 inhibition. Compound 8 showed the most potent inhibition against SIRT5, and further analysis revealed its binding mode and potential reaction with NAD+. The findings of this study provide useful information for developing drug-like inhibitors and chemical probes for studying SIRT5.
BIOORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
K. M. Srinivasamurthy, A. El-Denglawey, K. Manjunatha, Jagadeesha Angadi, M. C. Oliveira, E. Longo, S. R. Lazaro, R. A. P. Ribeiro
Summary: This study investigated the structural, electronic, magnetic, and dielectric properties of novel ferrite (CNF) Co1-xNixFe2O4 (x = 0.0, 0.25, 0.5, 0.75, and 1.0) nanoparticles synthesized via a low-cost combustion synthesis technique. The results confirmed the formation of single-phase ferrite with a cubic spinel structure. The electrical properties exhibited dispersion behavior associated with interfacial polarization mechanism and charge carrier hopping. DFT calculations supported the experimental findings and indicated a ferrimagnetic ground state with increased band gap and decreased dielectric constant as the amount of Ni increased. The low dielectric loss of CNF with Ni2+ substitution at higher frequencies makes it a promising candidate for energy-harvesting devices in the electronics industry.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
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
Engineering, Electrical & Electronic
Isabela C. F. Vaz, Carlos Eugenio Macchi, Alberto Somoza, Leandro S. R. Rocha, Elson Longo, Luis Cabral, Edison Z. da Silva, Alexandre Zirpoli Simoes, Giulia Zonta, Cesare Malagu, P. Mariela Desimone, Miguel Adolfo Ponce, Francisco Moura
Summary: This study explores the electrical properties of Nd-doped cerium oxide films synthesized using microwave assisted hydrothermal method. The increase in Nd content leads to structural disorder and the formation of defective clusters, which results in an increase in conductivity. The films demonstrate fast response time and show potential for gas sensor devices. Ab initio investigations reveal that oxygen vacancies play a fundamental role in enhancing the electrical conduction, mainly due to the presence of reduced Nd2+.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Thaiane Robeldo, Lucas S. Ribeiro, Lida Manrique, Andressa Mayumi Kubo, Elson Longo, Emerson Rodrigues Camargo, Ricardo Carneiro Borra
Summary: Low oxygen concentration in the tumor microenvironment is a major obstacle for photodynamic therapy of malignant tumors. Titanium dioxide (Ti(OH)(4)) shows potential as a photosensitizer for bladder cancer treatment due to its ability to produce high levels of reactive oxygen species (ROS) regardless of oxygen concentrations. In this study, exposure of Ti(OH)(4) to visible light stimulated ROS production and dose-dependently induced necrosis in tumor cells. Ti(OH)(4) also inhibited cell proliferation and migration in low concentrations. Mechanistically, Ti(OH)(4) may initiate type II cell death through autophagic dysfunction mechanisms associated with high ROS production.
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)
Article
Chemistry, Multidisciplinary
Raquel Dantas Campos, Andre Luiz Menezes de Oliveira, Arpad Mihai Rostas, Andrei Cristian Kuncser, Constatin Catalin Negrila, Aurelian-Catalin Galca, Camila Felix, Lucio Castellano, Fausthon Fred da Silva, Ieda Maria Garcia dos Santos
Summary: Recently, there has been interest in utilizing zeolitic imidazole frameworks (ZIFs) and TiO2 based composites to control the growth of pathogenic microorganisms. In this study, two novel TiO2/ZIF-67 nanocomposites were synthesized using microwave-assisted solvothermal methods, with one pot composite (OPC) and two step composite (TSC) syntheses. The results showed that the TSC sample had higher antimicrobial activity compared to pure ZIF-67, while the OPC sample had lower activity. The difference in antimicrobial performance can be attributed to the structural order/disorder and material solubility, which depend on the synthesis route used.
NEW JOURNAL OF CHEMISTRY
(2023)
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
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
Nanoscience & Nanotechnology
Ana Rita Ferreira Alves Teixeira, Andre Luiz Menezes de Oliveira, Florentina Neatu, Andrei Cristian Kuncser, Aurelian Catalin Galca, Arpad Mihai Rostas, Ieda Maria Garcia dos Santos
Summary: Sodium hexatitanate (Na2Ti6O13) nanoparticles were synthesized using hydrothermal method with microwave and conventional heating, and their photocatalytic properties were investigated. X-band electron paramagnetic resonance (EPR) spectroscopy was used for the first time to study the dynamics and reactivity of species involved in the photocatalytic mechanism of the (Na2Ti6O13) samples. X-ray diffraction analysis revealed a monoclinic C2/m structure in all samples with different short-range structural order based on the heating method. The presence of Ti3+ point defects, F centers, and oxygen-related defects were observed through EPR and X-ray photoelectron spectroscopy.
ACS APPLIED NANO MATERIALS
(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
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
Chemistry, Inorganic & Nuclear
Ivo M. Pinatti, Ana C. M. Tello, Paula F. S. Pereira, Aline B. Trench, Marcio D. Teodoro, Ieda L. V. Rosa, Alberico B. F. da Silva, Elson Longo, Juan Andres, Alexandre Z. Simoes
Summary: A systematic study was conducted to investigate the relationship between photoluminescence emissions and photocatalytic activity of Ag2SeO4 obtained by different synthesis methods. Experimental characterization techniques and density functional theory calculations were used to understand its structural order and surface properties. The results showed that the Ag2SeO4 synthesized by the coprecipitation method exhibited the most intense photoluminescence band and the best photocatalytic activity for rhodamine B degradation under UV light irradiation.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Cristian Dias Fernandes, Mateus Meneghetti Ferrer, Cristiane Wienke Raubach, Eduardo Ceretta Moreira, Luciano Timm Gularte, Sergio da Silva Cava, Pedro Lovato Gomes Jardim, Ramon Dadalto Carvalho, Elson Longo, Mario Lucio Moreira
Summary: ZnO particles grown as ZnO/ZnS(ZC + TAA) photoelectrodes using the microwave-assisted hydrothermal method exhibit excellent photovoltaic parameters, attributed to better charge transfer and resistance to recombination.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
A. Aly, M. Ghali, A. Osman, M. K. El Nimr
Summary: This study reports the discovery of naturally occurring luminescent graphene quantum dots (GQDs) in coconut water for the first time. The GQDs were identified through various measurements and were found to have dual sizes and emit different wavelengths of light. The GQDs were also utilized as an efficient optical sensor for aniline liquid detection.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zehua Chen, Wencheng Ma, Qinglu Fan, Yanhua Liu, Min Sun, Shuo Wang
Summary: The nanoscale e-VOPO4 materials were successfully prepared by hydrothermal synthesis and calcination, showing high purity and suitable particle size. It exhibited satisfactory electrochemical performance as cathode material for sodium ion batteries, making it a potential candidate for high energy storage systems.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Tao Liu, Yahui Liu, Le Ling, Zhongxi Sheng, Zao Yi, Zigang Zhou, Yongjia Yang, Bin Tang, Qingdong Zeng, Tangyou Sun
Summary: In this paper, a terahertz (THz) micronano device that can switch between bimodal absorption and plasmon-induced transparency (PIT) is proposed. The device consists of layers of graphene, silica, and vanadium dioxide, and has a simple structure, easy tuning, and wide-angle absorption. The device achieves perfect absorption at specific frequencies and is highly sensitive to environmental refractive index. It also has the functions of a three-frequency asynchronous optical switch and slow light effect.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Xiaobo Luo, Songhan Hu, Qiudong Duan, Dacheng Zhou, Jialin Chen, Yugeng Wen, Jianbei Qiu
Summary: The exploration of solar light absorption by a material is important in photonics and optoelectronics. This study reveals the potential of Ba3-xGa2O6:xBi3+ as a promising candidate for various photonic and optoelectronic applications, and demonstrates the use of the material in double-sided laser printing for three-dimensional optical imaging.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Hemin Wang, Yanling Hao, Lele Xiang, Xiaosi Qi, Lei Wang, Junfei Ding, Yunpeng Qu, Jing Xu, Wei Zhong
Summary: This study designed Fe3O4-FeCO3/MWCNTs/RGO MCNCs composites and fabricated large-scale samples using hydrothermal and freeze-drying methods. The microstructural investigation showed that these materials had a mixed-dimensional structure, which improved impedance matching features, polarization, and conduction loss abilities, leading to significantly enhanced electromagnetic absorption properties.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zhenshan Yu, Hao Chen, Xuequan Chen, Yu-Sheng Lin
Summary: This study presents a silicon dielectric metamaterial (SDM) composed of two outer symmetric semi-circular rings and two inner symmetric split-ring resonators (SRRs). The electromagnetic responses of the SDM device in different modes were studied through numerical simulations and experiments. Increasing the structure height of the SDM device resulted in red-shifted resonances and stronger intensities. This study provides a new design strategy for the development of frequency filtering, polarization switching, and resonance modulation characteristics in THz-wave applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yiming Qi, Na Zhang, Meng Zong, Yangxianzi Liu, Weixing Chen
Summary: This study prepares dielectric/carbon fiber based nanocomposites wave-absorbing materials using liquid diffusion and high temperature carbonization strategies. By tuning the element type, drying mode, and filling amount, the electromagnetic parameters and absorbing properties can be adjusted. The best synthesized sample shows excellent absorbing performance, making it suitable for a wide range of electromagnetic wave absorption applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Carlos D. Gonzales-Lorenzo, T. K. Gundu Rao, Alberto A. Ccollque-Quispe, Jorge Ayala-Arenas, Monise B. Gomes, Betzabel N. Silva-Carrera, Roseli F. Gennari, Valeria S. Pachas, F. Monzon-Macedo, H. Loro, Jose F. D. Chubaci, Nilo F. Cano, Rene R. Rocca, Shigueo Watanabe
Summary: In this study, CaSiO3 doped with different ppm of Eu was synthesized using the devitrification method. Various physical properties were analyzed, revealing that the intensity and temperature of the high-temperature TL peak increased with higher dopant amounts. Fluorescence measurements indicated the presence of Eu2+ and Eu3+ ions in the samples. EPR spectra confirmed the existence of two defect centers.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yanning Qu, Xinyang Li, Mei Cui, Renliang Huang, Wanquan Ma, Yunting Wang, Rongxin Su, Wei Qi
Summary: In this study, a new molybdenum disulfide/N,S-doped carbon quantum dots (MoS2/N,S-CQDs) heterojunction with enhanced light absorption and electrons transfer di-functional properties was constructed via a facile one-pot hydrothermal method. The heterojunction showed remarkable efficiencies in degrading methylene blue (MB) and malachite green (MG) in an actual water system under simulated sunlight irradiation. The facile synthetic technique and effective multifunctional properties of the composite have the potential for further research and industrial applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jiayi Wang, Penggang Ren, Xueyan Zhao, Zhengyan Chen, Yanling Jin, Zengping Zhang
Summary: In this study, a novel homojunction photocatalyst was developed by combining defective g-C3N4 and flaked g-C3N4, which showed excellent degradation performance and cycling stability, and exhibited practicality in several simulation experiments.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jing Yan, Xiaoxiao Zhao, Weixing Chen, Panbo Liu
Summary: This research presents a self-templated strategy to prepare a spherical superstructure of carbon nanorods through material modification and pyrolysis. The resulting material exhibits a large controllable radius of curvature and shows excellent microwave absorbing properties due to its high specific surface area and mesoporous structure.
MATERIALS RESEARCH BULLETIN
(2024)
Review
Materials Science, Multidisciplinary
Qinglin Zeng, Zepeng Lv, Shaolong Li, Bin Yang, Jilin He, Jianxun Song
Summary: Liquid metal batteries possess stable safety performance, high rate performance, and thermal stability. The electrolyte, an important component of the battery, plays a significant role in achieving these remarkable performance characteristics. This paper reviews the important research progress of liquid metal batteries electrolyte and discusses the influence of different electrolyte types on energy efficiency. It also highlights the limitations and challenges of existing electrolytes and proposes key development directions for liquid metal electrolytes.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Song Wu, Junli Wang, Xuanbing Wang, Di Jiang, Jinlong Wei, Xiaoning Tong, Zhenwei Liu, Qingxiang Kong, Naixuan Zong, Ruidong Xu, Linjing Yang
Summary: In this study, a composite electrode composed of Ti/TiH2/beta-PbO2_Mn3O4@C was fabricated and investigated for zinc electrowinning. The composite electrode exhibited low overpotential, Tafel slope, icorr, and high voltage stability, outperforming most reported Ti-based PbO2 electrode materials. The excellent catalytic activity can be attributed to the low resistance and porous interlayer of TiH2 nanosheets, as well as the addition of Mn3O4@C micro-flakes to the active layer.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
E. Tsoutsoumanos, T. Karakasidis, N. Laskaris, P. G. Konstantinidis, G. S. Polymeris, G. Kitis
Summary: This study investigates the correlation between nanocrystal dimensions and thermoluminescence signal magnitude through simulations conducted in Python. Two mathematical models, OTOR and IMTS, were used to derive theoretical luminescence signals. The obtained results were compared with experimental data and a thorough comparative discussion was conducted.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Vishnu Aggarwal, Sudhanshu Gautam, Aditya Yadav, Rahul Kumar, Bipul Kumar Pradhan, Brajesh S. Yadav, Govind Gupta, Senthil Kumar Muthusamy, Sumeet Walia, Sunil Singh Kushvaha
Summary: Recently, there has been a great demand for highly responsive photodetectors that can detect a wide range of wavelengths. Researchers have successfully fabricated a broadband metal-semiconductor-metal photodetector by integrating sputtered Bi2Se3 with laser molecular beam epitaxy grown GaN film. This photodetector shows high responsivity in both the ultraviolet and near-infrared regions.
MATERIALS RESEARCH BULLETIN
(2024)
