Article
Biophysics
Priyanka Prabhakar, Raj Kumar Sen, Monika Patel, Shruti, Neeraj Dwivedi, Shiv Singh, Pradip Kumar, Manisha Chouhan, Amit K. Yadav, Dehi Pada Mondal, Pratima R. Solanki, Avanish Kumar Srivastava, Chetna Dhand
Summary: By combining poly-dopamine, graphene oxide, and antimicrobial copper compounds, this study successfully developed hydrophobic antimicrobial nanocoatings on cotton fabric. The nanocoatings showed 100% bacterial inhibition against Staphylococcus aureus and a high reduction rate against Pseudomonas aeruginosa.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Multidisciplinary Sciences
Esti Toledo, Sharon Dim, Avishay Edri, Yariv Greenshpan, Aner Ottolenghi, Nadav Eisner, Sivan Tzadka, Ashish Pandey, Haggai Ben Nun, Guillaume Le Saux, Angel Porgador, Mark Schvartzman
Summary: The current Covid-19 pandemic has had a significant impact on various aspects of our lives. In addition to airborne transmission, the SARS-CoV-2 virus is also widely present on surfaces that we come into contact with daily. Therefore, controlling the pandemic requires reducing potential infections through contaminated surfaces. Researchers have developed composite materials containing copper and cupric oxide nanoparticles, which exhibit strong antiviral properties and can be used as long-term antiviral coatings against various pathogens, including SARS-CoV-2.
Article
Agricultural Engineering
Liqiang Xiao, Zheng Yao, Yongbin He, Zeyu Han, Xujing Zhang, Chengcheng Li, Pengwu Xu, Weijun Yang, Piming Ma
Summary: The lignin-zinc oxide hybrid particles were successfully synthesized using a hydrothermal method, and their addition to PBAT resulted in improved mechanical properties. The PBAT/LZn composite films exhibited UV shielding, antioxidant, and antibacterial activities, making them suitable for active food packaging.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Inorganic & Nuclear
Lingmin Meng, Shanyou Li, Changxu Wanyan
Summary: This study successfully prepared a novel chitosan-based metal nanocomposite, which showed promising antimicrobial activity and promoted wound healing.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Na Ji, Chunyan Dong, Jingjing Jiang
Summary: Conjugated bio-nanomaterials with magnetic core have attracted attention as a promising platform for new generation biological composites. In this study, a novel Cu NPs supported chitosan-starch composite functionalized Fe3O4, a dual core-shell type nanoparticle (Fe3O4@CS-Starch/Cu), was reported. The post synthetically modified biogenic material was comprehensively analyzed using various physicochemical methods. The anticancer properties of Fe3O4@CS-Starch/Cu against ovarian cancer cell lines were evaluated, and the results indicated its potential as an adjuvant chemopreventive and chemotherapeutic agent against cytotoxic cells.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Food Science & Technology
Khwanchat Promhuad, Danaya Phothisarattana, Yeyen Laorenza, Nattinee Bumbudsanpharoke, Nathdanai Harnkarnsujarit
Summary: Enhancing the antimicrobial functions of biodegradable polyesters by adding zinc oxide nanoparticles and optimizing the molecular orientation of the polymer can improve the mechanical properties of the material and produce sustainable active nanocomposite packaging.
Article
Chemistry, Physical
Biswajoy Bagchi, Carmen Salvadores Fernandez, Manni Bhatti, Lena Ciric, Laurence Lovat, Manish K. Tiwari
Summary: A novel antibacterial nanocomposite film containing copper nanowires was successfully fabricated in this study, showing excellent antibacterial activity and good biocompatibility towards human dermal fibroblast. The slow dissolution rate of the film and production of lower amount of ROS producing Cu2+ ions contribute to the low cytotoxicity of copper nanowires, indicating a strong potential for broader biomedical and clinical applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Mohamed Hasanin, Mohamed A. Al Abboud, Mohamed M. Alawlaqi, Tarek M. Abdelghany, Amr H. Hashem
Summary: Polysaccharides-based nanocomposites have been used for biomedical applications in recent years, and a nanocomposite based on myco-synthesized copper nanoparticles and starch was prepared in this study. The nanocomposite showed outstanding antimicrobial, antioxidant, and anticancer activities, making it promising for various biomedical applications.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Darka Markovic, Andrea Zille, Ana Isabel Ribeiro, Daiva Mikucioniene, Barbara Simoncic, Brigita Tomsic, Maja Radetic
Summary: The growing demand for sustainable and green technologies has led to the development of an antibacterial textile nanocomposite material based on cotton and peat fibers. By coating the substrate with chitosan and synthesizing copper-based nanostructures, the material exhibits strong antibacterial activity and controlled release of Cu2+ ions.
Article
Chemistry, Inorganic & Nuclear
P. R. Sougandhi, S. Ramanaiah, T. Shobha Rani
Summary: Antimicrobial CMC/P/Cu nanocomposite films were prepared using a green synthesis method, showing excellent oxygen and water vapor transmission rates at different concentrations. The films exhibited tetragonal CuNPs formation on the surface morphology, with strong antimicrobial properties against various bacterial cultures, making them suitable for food packaging applications.
INORGANIC AND NANO-METAL CHEMISTRY
(2022)
Article
Chemistry, Applied
Gemma C. Porter, Donald R. Schwass, Geoffrey R. Tompkins, Sharan K. R. Bobbala, Natalie J. Medlicott, Carla J. Meledandri
Summary: The synthesis and incorporation of antimicrobial silver nanoparticles (AgNPs) into an alginate hydrogel showed improved properties and antibacterial effects, with controlled release of silver ions for specific microorganisms and biofilms.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Veena Wenqing Xu, Mohammed Zahedul Islam Nizami, Iris Xiaoxue Yin, Ollie Yiru Yu, Christie Ying Kei Lung, Chun Hung Chu
Summary: Nanoparticles based on metal and metallic oxides have emerged as a new trend in dental applications. Copper nanoparticles, due to their abundance, low cost, and ability to intermix with other materials, have become commonly used metal nanoparticles in dentistry.
Article
Biochemistry & Molecular Biology
Mohamed Saied, Mohamed Hasanin, Tarek M. Abdelghany, Basma H. Amin, Amr H. Hashem
Summary: Recently, the increase in antimicrobial resistance, especially Candida infections, has become a global concern. This study focused on developing a novel nano-composite using mycosynthesized copper oxide nanoparticles (CuONPs), nanostarch, and nanochitosan. The researchers isolated 24 Candida isolates from clinical samples and identified three strains, C. glabrata MTMA 19, C. glabrata MTMA 21, and C. tropicalis MTMA 24, as the most resistant to commercial antifungal drugs. The nanocomposite exhibited significant anticandidal activity against these resistant strains by disrupting the cell wall and causing cell death. The results suggest that the biosynthesized nano-composite holds promise as an effective agent against multidrug-resistant Candida.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Biochemistry & Molecular Biology
Javiera Ramos-Zuniga, Nicolas Bruna, Jose M. Perez-Donoso
Summary: Copper is a historically used metal to prevent infections and has potential in combating infectious disease outbreaks. Copper nanoparticles and surfaces are common antimicrobial copper-based technologies. The mechanisms explaining their unique antimicrobial properties are not fully understood, but involve membrane rupture, ion accumulation, protein inactivation, and DNA damage. Understanding the toxicity mechanisms of copper nanoparticles and surfaces is important for developing efficient antimicrobial technologies.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Chhavi Sharma, Dinesh Singh, Ritu Srivastava, Shailesh Narain Sharma
Summary: In this study, a bionanocomposite using cellulose and TiO2 was prepared for plant crop protection. The nanocomposite exhibited synergistic effects against antimicrobial pathogens, showing strong inhibition of bacterial and fungal growth. These findings suggest that the nanocomposite has potential as an antimicrobial agent for agricultural crops.
CHEMISTRY & BIODIVERSITY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Silvia Castro-Jara, Barbara Antilef, Carolina Osben, Raul Alcantara, Marco Fraga, Estefania Nova-Lamperti, Gabriela Sanchez-Sanhueza
Summary: This study evaluated the immune bioactivity of testing media (TM) obtained from different calcium silicate-based sealers and cements on monocyte morphology, activation, differentiation, and cytokine secretion. The results showed that calcium silicate-based materials changed the morphology of CD14(+) monocytes, and BioRoot-RCS and Biodentine significantly upregulated CD86 expression. BioRoot-RCS also had the highest immunomodulatory properties for cytokine production.
INTERNATIONAL ENDODONTIC JOURNAL
(2023)
Article
Chemistry, Physical
H. N. Fernandez-Escamilla, J. I. Paez-Ornelas, C. D. Gutierrez-Lazos, F. J. Solis-Pomar, J. Guerrero-Sanchez, E. G. Perez-Tijerina
Summary: This study comprehensively investigated the (001) BiOX surfaces by utilizing a comprehensive ab-initio approach. The stability of various surface terminations and defects were analyzed using first-principles thermodynamics. The results revealed that Bi-terminated BiOX (1 x 1) surfaces were the most stable under Bi-rich and O-rich conditions, while halogen-terminated BiOX (1 x 1) surfaces became stable under Bi-rich and O-poor conditions. Moreover, Bi and O vacancies on the BiOX (2 x 1) surfaces were found to stabilize the surface reconstructions. These findings are of great significance for the design and optimization of BiOX surface catalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Hector Sepulveda, Rodrigo Valle, Gonzalo Pincheira, Chandra Shekhar Prasad, Alexis Salas, Carlos Medina, Victor Tuninetti
Summary: This article describes the development and numerical analysis of the blade containment test of a commercial aircraft turbofan engine. Two simulation models are used to evaluate the structural integrity of the casing after the detachment of a fan blade. The results analysis provides an efficient computational tool for the redesign of the casing.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jesus Ramirez, Andres Diaz-Gomez, Luis Felipe Montoya, Saireddy Shiva Samhitha, David Rojas, Angelo Onate, Andres Felipe Jaramillo, Manuel Francisco Melendrez
Summary: The objective of this study was to improve the protection of metallic structures against corrosion by combining organic corrosion inhibitors (tannins derived from pine bark) with anodic protection using chemically modified zinc oxide nanoparticles. Film evaluations were conducted according to ISO and ASTM standards. The study also evaluated the performance of two commercial coatings and conducted electrochemical impedance spectroscopy (EIS) characterizations at different exposure times. The results showed that the combination of tannins and encapsulated zinc oxide nanoparticles is a viable alternative to commercial coatings with synthetic compounds, providing high-performance corrosion protection.
Article
Engineering, Environmental
A. Salas, M. E. Berrio, S. Martel, A. Diaz-Gomez, Daniel A. Palacio, V. Tuninetti, C. Medina, M. F. Melendrez
Summary: In this research, the recovery of carbon fibers is examined using two methods: two-step pyrolysis and microwave-assisted thermolysis. The results show that fibers recovered by pyrolysis maintain their original mechanical properties with minimal damage. However, fibers recovered by microwaves undergo significant surface changes and reduced tensile strength. Microwave-assisted thermolysis is faster and provides recycled fibers with superior surface activation. The findings of this study are valuable for evaluating the direct reuse of recovered fibers in new composite materials.
Article
Materials Science, Multidisciplinary
Angelo Onate, Maria Isabel Alvarado-Avil, Carlos Medina, Claudio Villegas, Jesus Ramirez, Juan Pablo Sanhueza, Manuel Melendrez, David Rojas
Summary: Quench and partition steels are widely used in the automotive industry for their high energy absorption capability. The research on these materials has expanded due to industrial demands, as they play a significant role in reducing passenger damage from high impact. Achieving adequate austenite retention and optimal properties in the partition process is challenging due to the control required over thermodynamics and kinetics of phase transformation. Previous studies have focused on increasing energy absorption efficiency by incorporating microalloying elements, but no research has been done on using Nb and Si microalloying on low-carbon steels in a two-stage quenching and partitioning process. This study designed and modeled an alloy with mechanical reinforcement and validated the model through steel sample fabrication. The results showed that thickness influences austenite retention, and a 10.75% retained austenite allows for an energy absorption of 30.55 GPa% with a two-stage quenching and partitioning heat treatment. Virtual tests quantified the unit strain energy absorption of retained austenite at 1.9 mJ at 25 degrees C.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
A. Onate, J. P. Sanhueza, J. Ramirez, C. Medina, M. F. Melendrez, D. Rojas
Summary: The present work updates empirical parameter ranges and designs a new high entropy alloy with FCC structure reinforced by intermetallic phase precipitation. The main results show that valence electron concentration (VEC) and lattice packing factor are important in predicting phases and intermetallics effectively in high entropy alloys. The study reports phase stability ranges based on VEC computed by CALPHAD and validated experimentally. The interdendritic zone is found to be a preferential precipitation zone, with sigma, TiC, and gamma' phases observed. The alloy exhibits superior mechanical response and high ductility, making it suitable for aerospace applications and hydrogen tanks.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Dentistry, Oral Surgery & Medicine
Soledad Rebolledo, Raul Alcantara-Dufeu, Luis Luengo Machuca, Luciano Ferrada, Gabriela Alejandra Sanchez-Sanhueza
Summary: This study aimed to evaluate the real-time biocompatibility of calcium silicate-based cements with human periodontal ligament cells. The results showed that all cements had a significant impact on cell proliferation, with ProRoot MTA and Biodentine promoting cell growth. In contrast, Tubli-Seal and TotalFill-BC Sealer inhibited cell growth and increased cell death. Overall, the biocompatibility of the repair cements was better than that of the sealer cements.
CLINICAL AND EXPERIMENTAL DENTAL RESEARCH
(2023)
Article
Automation & Control Systems
Angelo Onate, Thyare Saez-Llanos, Andres Jaramillo, Gustavo Vargas-Silva, Manuel Melendrez, Carlos Medina
Summary: This study focuses on the development of composite materials, specifically PLA + zeolite and PP + zeolite, doped with Cu nanoparticles, for effective application in the biomedical field through 3D manufacturing. The results show that the incorporation of zeolite significantly increases the stiffness of the composite materials, providing an efficient, cost-effective, and non-toxic alternative.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Angelo Onate, Juan Pablo Sanhueza, Diabb Zegpi, Victor Tuninetti, Jesus Ramirez, Carlos Medina, Manuel Melendrez, David Rojas
Summary: This study evaluated the phase prediction capability of high entropy alloys using four supervised machine learning models K-Nearest Neighbors (KNN), Multinomial Regression, Extreme Gradient Boosting (XGBoost), and Random Forest. The study addressed the challenge of predicting multicomponent alloys by considering the overlapping of multicategorical stability parameters. Eight prediction classes were used. The results showed that with the right database, data treatment, and training, satisfactory prediction indicators can be obtained using traditional machine learning predictions based on four prediction classes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Crystallography
Angelo Onate, Enrique Torres, Diego Olave, Jesus Ramirez, Carlos Medina, Juan Pablo Sanhueza, Manuel Melendrez, Victor Tuninetti, David Rojas
Summary: The corrosion and mechanical response of a new Nb-doped stainless steel welded joint under quenching were studied. The study aimed to contribute to the circular economy and establish disruptive manufacturing criteria based on metallurgical principles.
Article
Materials Science, Multidisciplinary
V. Tuninetti, A. Onate, M. Valenzuela, H. Sepulveda, G. Pincheira, C. Medina, C. Garcia-Herrera, L. Duchene, A. M. Habraken
Summary: The anisotropic plasticity constants of the CPB06 criterion for Ti64 were used to evaluate the effect of direct and inverse calibration strategies on the predictive behavior of large deformations of the hexagonal close-packed alloy. The results provide insights into the identification of laws modeling large deformations of hcp materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Biomaterials
Diego Belmonte, Claudio Mella, Gabriela Sanchez-Sanhueza, Andres Opazo-Capurro, Hector Aguilar-Bolados, Bruno Boury, Bruno F. F. Urbano
Summary: The size and shape of nanoparticles, such as graphene oxide (GO) platelets, have a significant impact on the properties of nanocomposites, including their mechanical strength and antibacterial effects. The current study demonstrates that increasing GO sheets in gelatin hydrogels improves mechanical strength and bactericidal capacity, particularly against drug-resistant strains. Therefore, the lateral dimensions of GO sheets play a crucial role in determining the properties of hydrogels.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
Lina M. M. Romero, Nicolas Araya, Daniel A. A. Palacio, Gabriela A. A. Sanchez-Sanhueza, Eduardo G. G. Perez, Francisco J. J. Solis, Manuel F. F. Melendrez, Carlos Medina
Summary: In this study, copper (II) ions were saturated and supported in natural zeolite via contact with a copper ion precursor solution and mechanical agitation, respectively. The adsorption of copper ions in the zeolite and the antibacterial properties of CuO NPs were investigated. The results showed efficient saturation of copper (II) ions in the zeolite, obtaining high concentration within a short time. The material exhibited excellent bactericidal effect against drug-resistant bacteria and has potential applications in dental biomedical field.
