Article
Nanoscience & Nanotechnology
Ivan S. Pavlov, Anna G. Ivanova, Vladimir P. Filonenko, Igor P. Zibrov, Alexei E. Voloshin, Pavel V. Zinin, Alexander L. Vasiliev
Summary: This study investigates the formation of boron carbide superhard particles through a liquid-phase reaction at high pressure and high temperature. The synthesized particles exhibit a rhombic hexecontahedron morphology with twelve five-vertex stars. Electron microscopy and X-ray diffraction were used to analyze the crystal structure of these particles, revealing multiple cycling twinning rather than quasi-crystalline symptoms. The specific shape of the particles is explained by the decrease of surface energy during formation at high pressure and high temperature.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Kazuma Nakajima, Shogo Mitsuhashi, SeongYong Cho, Masanori Ozaki
Summary: The orientation analysis of liquid crystal (LC) devices plays a vital role in understanding and controlling light propagation behavior. This study focused on BPII deflectors and demonstrated their lattice arrangement and slanted structure using Bragg reflections and transmission electron microscopy. The experimental results matched the most probable calculated structure, providing valuable insight into the orientation mechanism in high-order self-organizing soft matter structures.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Editorial Material
Chemistry, Multidisciplinary
Jingshan S. Du, Wenjie Zhou, Sara M. Rupich, Chad A. Mirkin
Summary: The structure of MTPs is determined by specific crystallographic features, and their formation pathways include growth from multiply twinned seeds or stepwise formation of new twin boundaries on single-crystalline seeds. Recent studies have utilized in situ transmission electron microscopy to provide real-time evidence for both pathways, which will aid in the design of robust MTP syntheses. Further research on the structural evolution and energetics of nanoparticles is needed for a complete understanding of MTP formation pathways.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Hui Zhang, Tao Xu, Yatong Zhu, Wen Wang, Hao Zhang, Dundong Yuan, Litao Sun
Summary: The study revealed oscillatory growth during the oxidation process of silver, influenced by both thermodynamic and kinetic factors. These findings enhance the fundamental understanding of oxidation processes and offer a promising method for the fabrication of desired nanostructures.
Article
Chemistry, Physical
Farid Labib, Nobuhisa Fujita, Hiroyuki Takakura, Satoshi Ohhashi, Takayuki Shiino, An-Pang Tsai, Ryuji Tamura
Summary: The stability region and atomic structure of the 1/1 cubic crystalline approximant to icosahedral quasicrystal in the Cd-Mg-Ce system were investigated. The study found that the approximant spans a wide compositional range and that Mg addition shifts the stability region to lower temperatures. A new variant of the approximant with different atomic structures was also discovered within the compositional range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Aneta Wardak, Witold Chrominski, Anna Reszka, Dominika Kochanowska, Marta Witkowska-Baran, Malgorzata Lewandowska, Andrzej Mycielski
Summary: This study presents a defect analysis in Cd and Te inclusion regions within Bridgman-grown Cd0.95Mn0.05Te crystals for nuclear detectors. Contrary to Cd inclusions causing microcracks, Te inclusions do not generate defects but induce higher stresses. The higher stress from Te inclusions has a smaller impact on charge carrier transport in detectors compared to Cd inclusions, as confirmed by mu tau product measurements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Boyi Qu, Klaus van Benthem
Summary: This study reports the one-directional growth of single crystalline nickel oxide nanostructures that is facilitated by the oxidation of nickel nanoparticles. By in-situ high resolution transmission electron microscopy, layer-by-layer growth at the buried NiO/Ni interface was directly observed. The results demonstrate the applicability of the terrace-ledge-kink crystal growth model for reactive crystal growth processes at internal heterophase interfaces.
SCRIPTA MATERIALIA
(2022)
Article
Construction & Building Technology
Yangyang Zhang, Qingxin Zhao, Zhanming Gao, Jun Chang
Summary: The influence of hydration temperature on the nanostructure of the AH3 phase formed in calcium sulfoaluminate cements was investigated in this study. Different crystal structures were observed for AH3 phases formed by ss-ye'elimite and st-ye'elimite at varying curing temperatures. TEM/SAED analysis and FE-SEM images provided direct evidence of the nanostructure of hydration products.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Geochemistry & Geophysics
Shawn L. Riechers, Eugene S. Ilton, Odeta Qafoku, Yingge Du, Sebastien N. Kerisit
Summary: This study quantifies the effects of the nature of the mineral substrate and solution chemistry on the competitive heterogeneous growth between cobalt carbonate and cobalt hydroxide. The findings highlight the importance of lattice mismatch, heterogeneous nucleation barriers, and rates of heterogenous growth in influencing the outcome of geochemical reactions.
Article
Engineering, Chemical
Sudip Pradhan, Debottam Goswami, Debdatta Ratna, Santanu Chattopadhyay
Summary: This study investigates the dispersion tendencies and cause/effect relationships of a carbonaceous nanofiller in different elastomer matrices. By incorporating graphene nanoplatelets into polychloroprene rubber, hydrogenated nitrile rubber, and ethylene vinyl acetate, composites with improved mechanical and electrical properties were fabricated.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Engineering, Chemical
Rahul Tarodiya, Avi Levy
Summary: The study focuses on surface erosion caused by solid particle impact, developing a model for numerical erosion simulation of polymers and polymer composites. The model accurately captures key parameters under different erosion modes, relating them to measurable mechanical properties of the materials.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Benjamin Mallada, Qifan Chen, Taras Chutora, Ana Sanchez-Grande, Borja Cirera, Jose Santos, Nazario Martin, David Ecija, Pavel Jelinek, Bruno de la Torre
Summary: This study reveals that deliberately introducing atomic-scale defects into a specific anthracene-ethynylene pi-conjugated polymer can modify its inherent electronic and magnetic properties, affecting the material's performance. The results demonstrate a higher likelihood of forming low-dimensional defects at specific sites in polymers, offering new possibilities for engineering macroscopic defects in surface-synthesized conjugated polymers.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Kimberly A. A. Dick
Summary: Gas-phase transmission electron microscopy provides important insights into the mechanisms of functional materials synthesis. This review summarizes the latest developments in understanding the in situ growth of novel nanostructural materials using electron microscopes. It focuses on the catalyzed growth of one-dimensional carbon-based and semiconductor nanostructures, and briefly touches on other types of nanocrystal and epitaxial crystal growth. The article also discusses how these methods contribute to answering critical questions about growth mechanisms and the relationships between synthesis parameters and materials properties.
Article
Materials Science, Multidisciplinary
B. D. S. Deeraj, Gejo George, N. R. Dhineshbabu, Suryasarathi Bose, Kuruvilla Joseph
Summary: This study focused on the preparation and characterization of zirconia incorporated PAN-based carbon nanofiber reinforced epoxy composites as effective EMI shielding materials. The results showed superior storage modulus and excellent EMI shielding effectiveness, especially stacking the ZrO2@CNF mats to achieve outstanding shielding effectiveness above -90 dB in the Ku band, which is significant for industrial, radar, and military applications.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Ceramics
Sarabjit Singh, Vajinder Singh, Sweety Kumari, A. Udayakumar, V. V. Bhanu Prasad
Summary: The study found that the flexural strength of SiC seal-coated C-f/SiC composites, whether with a single-layer pyrocarbon (PyC) interphase or multilayered (PyC/SiC)(n=4) interphase, was significantly higher than that of un-coated samples.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Daniele M. Catori, Elizangela H. Fragal, Igor Messias, Francielle P. Garcia, Celso Nakamura, Adley F. Rubira
Summary: This study focused on evaluating the effects of cellulose nanocrystals on pectin hydrogels and the properties of hydroxyapatite obtained through different methods. The results showed that hydrogels with 5% cellulose nanocrystals exhibited better mineralization of hydroxyapatite in the biomimetic method. Overall, hydrogels obtained through biomimetic method showed slightly higher biocompatibility compared to hybrid hydrogels obtained from chemical precipitation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Analytical
Paulo Henrique Maciel Buzzetti, Maiara Mitiko Taniguchi, Nayara de Souza Mendes, Renata Correa Vicentino, Jean Halison de Oliveira, Bento Pereira Cabral Junior, Marcos de Souza, Johny Paulo Monteiro, Emerson Marcelo Girotto
Summary: In this study, a microfluidic device based on serial dilution was developed to generate nonlinear concentration gradients for dyes and biomolecules. The device was mathematically described and statistically validated, showing reproducibility in experiments and agreement with computational fluid dynamics simulation. The applicability of the device was demonstrated by coupling it with a surface plasmon resonance (SPR) biosensor, and the results were validated by fluorescence emissions.
Article
Chemistry, Applied
Elizangela H. Fragal, Vanessa H. Fragal, Elisangela P. Silva, Alexandre T. Paulino, Edson C. da Silva Filho, Marcos R. Mauricio, Rafael Silva, Adley F. Rubira, Edvani C. Muniz
Summary: This review presents recent advances in polysaccharide-based magnetic hydrogels as smart platforms for various biomedical applications, covering their synthesis methods, synergic properties, and contributions in drug delivery, tissue regeneration, and hyperthermia therapy.
CARBOHYDRATE POLYMERS
(2022)
Article
Materials Science, Composites
Felipe Delapria Dias dos Santos, Vagner Roberto Batistela, Andressa dos Santos, Jean Halison de Oliveira, Eduardo Radovanovic, Daniele Cristina Tita Granzotto, Silvia Luciana Favaro
Summary: Low-cost hybrid polyurethane/natural fibers composites were developed and characterized, and the optimal compositions for different types of fibers were determined.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Pharmacology & Pharmacy
Marilia Cestari, Barbara Sthefani Caldas, Dyenefer Pereira Fonseca, Rodolfo Bento Balbinot, Danielle Lazarin-Bidoia, Issei Otsuka, Celso Vataru Nakamura, Redouane Borsali, Edvani Curti Muniz
Summary: Nanofibers containing silk fibroin, chondroitin sulfate, and silver sulfadiazine were prepared using electrospinning technique. The addition of poly (ethylene oxide) improved the electrospinnability. The nanofibers had a diameter between 262 and 328 nm before PEO removal and between 242 and 345 nm after PEO removal. CS and SSD remained in the nanofibers, and CS significantly influenced the remaining SSD content. The nanofibers were non-toxic to Vero cells and had antibacterial activity depending on the concentration of CS.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Manuel E. G. Winkler, Elisangela P. da Silva, Marcos H. Kunita, Adley F. Rubira
Summary: This study presents a method for obtaining silica particles through pressured carbonation and demonstrates the influence of CO2 pressure on material properties. The simplicity and practical importance of this method, as well as its ability to synthesize various types of silica materials and composites, are highlighted.
Article
Environmental Sciences
Mario Cezar Pozza Junior, Andressa Giombelli Rosenberger, Franciele Fernanda da Silva, Douglas Cardoso Dragunski, Edvani Curti Muniz, Josiane Caetano
Summary: The use of electrochemical sensors in the detection and quantification of chemical agents from environmental samples is effective for monitoring environmental quality. In this study, a polymer-based sensor for 2,4,6-trichlorophenol determination was developed using electrospinning of a blend of poly(lactic acid)/poly(butylene adipate-co-terephthalate) (PLA/PBAT) with graphite. The thermal treatment of graphite-containing fibres improved the adhesion surface for adsorption of the analyte, leading to enhanced peak current in the electrochemical tests. The developed PLA/PBAT/Graphite sensor exhibited excellent detection and quantification limits, as well as a strong linear response.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Chemical
M. N. Queiroz, Rafael Silva
Summary: Due to their wide range degree of organization, amorphous carbons are prospective materials for the selective separation of alkaline metals ions. A study of the drift of alkaline ions on amorphous carbons with different degrees of organization at different applied electric fields demonstrates that amorphous carbon membranes show great performance in lithium separation from other alkaline metal ions.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Michelly C. G. Pella, Andressa R. Simao, Marcos R. Mauricio, Douglas C. Dragunski, Rafael da Silva, Adley F. Rubira
Summary: This study evaluated the effects of different parameters on the properties of starch. The results showed that the volume and temperature of GMA had an impact on the DS and X-c, and their correlation increased the DS and Xc. Higher temperatures also favored hydrolysis. Although parameter correlations did not have a significant effect on the assessed properties, they changed the effect of individual parameters.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2022)
Article
Polymer Science
Alessandra Ruyz Medeiros, Fabiana da Silva Lima, Andressa Giombelli Rosenberger, Douglas Cardoso Dragunski, Edvani Curti Muniz, Eduardo Radovanovic, Josiane Caetano
Summary: This study aimed to use electrospinning to obtain PBAT/PLA polymer fibers with semiconductors TiO2-R and Fe3O4 to enhance the photocatalytic degradation of environmental contaminants. The parameters used in electrospinning were a needle to target distance of 12 cm, a flow rate of 1 mL h(-1), and a voltage of 14 kV. The best mass ratio of semiconductors in the fibers was determined to be 10% TiO2-R and 1% Fe3O4 at pH 7.0. Characterization techniques such as SEM, DSC, XRD, TGA, and FTIR confirmed the presence of TiO2-R and Fe3O4 in the fibers and their interaction with the polymers, leading to changes in crystallinity and degradation temperature. The fibers exhibited a 64.0% efficiency in degrading Reactive Red 195 dye within 24 hours, indicating potential for photocatalytic degradation of environmental contaminants.
Article
Microbiology
Elton Cruz, Beatriz Diniz, Larissa M. K. Ochikubo, Thais E. Kawasaki, Flavia F. Veiga, Danielle Lazarin-Bidoia, Gabriel B. Cesar, Eduardo Radovanovic, Wilker Caetano, Terezinha I. E. Svidzinski, Melyssa Negri
Summary: In this study, a 3D in vitro model using PCL nanofiber scaffolds colonized by HeLa cells was developed for the investigation of fungal infection. The results showed that the nanostructured PCL scaffolds had favorable physicochemical characteristics and supported the growth of HeLa cells with indications of extracellular matrix production. This model provides a viable and economical platform for studying fungal infections.
FUTURE MICROBIOLOGY
(2023)
Article
Engineering, Manufacturing
Mariana Moraes Goes, Bruno Matheus Simoes, Fabio Yamashita, Suzana Mali de Oliveira, Gizilene Maria de Carvalho
Summary: This study aimed to develop a novel colorimetric indicator film using cassava starch, isomalt, and glycerol with 20% wt.% of grape skin extract (GSE) as an indicator of fish freshness. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and RGB color analysis confirmed the homogeneous distribution of GSE in the starch matrix. GSE reduced the thermal stability, k1 value, solubility, swelling values, and %E, while increasing the tensile strength (TS), indicating its plasticizing potential. The pH range compatibility and indicator activity of the GSE-containing film make it an excellent candidate for monitoring fish freshness.
PACKAGING TECHNOLOGY AND SCIENCE
(2023)
Article
Engineering, Environmental
Elisangela Pacheco da Silva, Vanessa Hafemann Fragal, Elizangela Hafemann Fragal, Thiago Sequinel, Luiz Fernando Gorup, Rafael Silva, Edvani C. Muniz
Summary: Plastic waste consumption has been exponentially increasing every year, posing a significant environmental concern in modern society. Improper disposal of used supercapacitors also leads to serious environmental impacts. Transforming trash into high-valued materials, such as carbon nanomaterial supercapacitors, is a critical action to address these issues.
Article
Chemistry, Applied
Luiz B. S. Filho, Ronaldo C. Coelho, Edvani C. Muniz, Herbert de S. Barbosa
Summary: This study analyzed 209 articles on pectin extraction via response surface methodology (RSM) collected from Web of Science(C) and Scopus(C), using Bibliometrix for science mapping analysis. The trends in optimization and extraction methods of pectin via RSM were identified. The results showed that China was the most active country in terms of local productions, while Iran, Brazil, India, and the United Kingdom contributed to international collaborative publications. Assisted extraction methods and the physical and functional properties of pectin have gained more relevance in recent years.
CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Maria G. Fressatti, Bento P. Cabral Jr, Jean H. de Oliveira, Paulo H. M. Buzzetti, Eduardo Radovanovic, Johny P. Monteiro, Emerson M. Girotto
Summary: The study proposes a dual sensor incorporating optical and electrochemical detection mechanisms on the same platform, enabling versatile detections in biosensing. The sensor's ability to respond to physical surface variations was assessed through measurements of gold nanoparticles band redshift and charge transfer resistance from impedance spectra. The platform demonstrated its applicability in dual detection mode by detecting streptavidin immobilized on the surface using both mechanisms.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2021)
