Article
Materials Science, Multidisciplinary
Nimitt G. Patel, Philip A. Yuya
Summary: This study focuses on the characterization of nanoscale viscoelastic properties of gold nanoparticle-reinforced chitosan nanocomposites using nanoindentation. The results show that the modulus and plasticity index of the nanocomposites increase with an increase in the concentration of gold nanoparticles. Moreover, the time-dependent viscous response of the nanocomposites is mainly governed by the response of the matrix.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Feifei Zhou, Shun Wang, Baosheng Xu, Yiguang Wang, Xiaofeng Zhang, You Wang
Summary: This article evaluates and compares the nanomechanical properties of nanostructured and conventional thermal barrier coatings (TBCs). The results show that the microstructure of the coating has a significant effect on the plastic indentation work, with the nanostructured coating exhibiting higher erosion performance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Sung Ho Lee, Hyo Sung Kim, Hyun Woo Song, Moon Kyu Kwak
Summary: Artificial dry adhesives have been developed by many researchers, with most consisting of polymers that exhibit limitations under high-temperature and vacuum conditions. A dry adhesive using fluorocarbon rubber has been developed in this study, showing high pull-off strength and feasibility in industrial applications such as glass transportation systems.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Jinming Li, Yuhua Huang, Yuqi Zhou, Fulong Zhu
Summary: Molecular dynamics simulations were used to investigate the repeated nanoindentation on aluminum substrate with varying thicknesses of boron nitride nanosheet coating. The study reveals that the hardness of the substrate increases with coating thickness. The pressure area of the aluminum substrate also increases with coating thickness. The coating force causes more atoms to move along the loading direction, leading to substrate slip and severe atomic strain. However, some aluminum atoms are able to elastically recover after unloading, despite being severely deformed. After multiple loadings, elastic deformations transition into plastic deformations, possibly accompanied by lattice structure destruction and the presence of amorphous atoms.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Andreia A. Ferreira, Francisco J. G. Silva, Arnaldo G. Pinto, Vitor F. C. Sousa
Summary: PVD and CVD have become more significant in the past two decades due to concerns about environment, public safety, and health, leading to a shift from electrodeposition to cleaner deposition processes. Studying chromium coating processes through PVD-sputtering is important as an alternative to electroplated hexavalent chromium, especially in the production of optical products in the automotive industry. The study found that thin multilayered Cr coatings can be successfully applied to polymeric substrates for optical applications in the automotive industry.
Article
Engineering, Biomedical
ThiThuHa Phan, John E. Jones, Meng Chen, T. L. Strawn, Hekmat B. Khoukaz, Yan Ji, Arun Kumar, Douglas K. Bowles, William P. Fay, Qingsong Yu
Summary: This study evaluated the in vitro biological responses of modified silicon nitride phosphorous film coatings on coronary stents made of cobalt chromium alloy and stainless steel. The results showed that the modified coatings had good surface composition and chemical stability, promoting endothelial cell proliferation and migration while inhibiting smooth muscle cell growth and migration, as well as reducing platelet adhesion and activation.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2023)
Article
Polymer Science
Eunmi Cho, Sehwan Song, Mac Kim, Jin-Seong Park, Sungkyun Park, Sang-Jin Lee
Summary: The physical property changes in plasma-polymerized fluorocarbon (PPFC) thin films near the melting temperature were investigated. The PPFC thin films maintain their physical properties at temperatures above the melting point and exhibit properties similar to bulk PTFE while maintaining an amorphous structure.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
Mac Kim, Sung Hyun Kim, Yecheol Rho, Eunmi Cho, Jae Heung Lee, Sang-Jin Lee
Summary: Highly transparent and flexible Cu-plasma-polymerized fluorocarbon (PPFC) nanocomposite thin films with hydrophobicity and antistatic properties were proposed, showing excellent mechanical robustness and fatigue resistance. These films have potential applications in various industries such as flexible displays, medical, automobiles, functional textiles, and aerospace.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
D. F. Zambrano, R. Villarroel, R. Espinoza-Gonzalez, N. Carvajal, A. Rosenkranz, A. G. Montano-Figueroa, M. J. Arellano-Jimenez, M. Quevedo-Lopez, P. Valenzuela, W. Gacitua
Summary: This study focused on designing anti-reflective coatings based on multi-layers of TiO2 and SiO2 by magnetron sputtering on glass and silicon substrates, followed by thermal annealing at different temperatures. The coatings annealed at 400 degrees Celsius showed optimized reflectance of about 2%, demonstrating improved mechanical properties and microstructural evolution. Elevated temperatures led to damage of the glass substrate, causing an increase in reflectance, while the sample annealed at 400 degrees Celsius exhibited enhanced mechanical properties and efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Coatings & Films
Fu Jun Wei, Bang Yen chou, Kuan Zhong Fung, Shu Yi Tsai
Summary: This study investigates the plastic strain distribution of cold spray Cu powders and coatings using electron backscatter diffraction (EBSD) analysis. It is found that more dynamic recrystallization and plastic strain release occur in the as-sprayed EP and GA coatings compared to the WA coating. The influence of recrystallization of twin grains in the GA coating on the ductility of the coating is discussed. The static recrystallization in the postannealing treatment is more prominent in the EP and GA coatings, supporting differences in dynamic recrystallization among the cold-sprayed coatings determined through EBSD analysis. The thermal conductivity of cold-sprayed Cu coatings is affected by recrystallization and strain release.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Devi Lal, Sanjay Sampath
Summary: A modified three-point bending technique was proposed to measure the interfacial toughness of thick plasma sprayed ceramic coatings. The test involved creating a pre-crack and measuring crack propagation along the interface using a pop-in load. Finite element analysis was used to calculate the interfacial toughness. The results were compared with the tensile adhesion test, and a correlation was proposed between the two methods.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Sharear Kabir, Zhifeng Zhou, Zonghan Xie, Paul Munroe
Summary: New multilayer coatings were produced by incorporating alternating soft and hard DLC layers onto a Cr/CrCx graded layer via CFUBMS, maintaining a constant hard-to-soft layer thickness ratio. The coatings exhibited sharp interfaces between soft and hard layers, increased hardness correlated with increased sp(3) content, and excellent plastic deformation resistance and adhesion strength. Further investigations are needed to assess coating durability, but the multilayer design offers a unique opportunity to combine high hardness with damage resistance without the need for complex multilayer systems.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Haiyan Feng, Yanfei Ma, Zhizhi Zhang, Song Yang, Zhengfeng Ma, Yunlei Zhang, Shuanhong Ma, Bo Yu, Meirong Cai, Xiaowei Pei, Feng Zhou
Summary: This study introduces a strategy to quickly reverse the adhesion properties of hydrogels by anchoring very thin adhesive coatings on their surface, providing hydrogels with more potential applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Mechanical
Qianzhi Wang, Mingling Zhou, Xuxin Jin, Fei Zhou, Zhifeng Zhou
Summary: The co-incorporation of Ni and Cu at specific ratios (11.01% and 3.41% respectively) has been shown to significantly improve the hardness and wear resistance of CrBN coatings, with CuO acting as a lubricating layer. However, excessive Cu content can lead to a sharp decline in hardness and weaken the wear resistance of the coatings. Therefore, Ni (11.01%) and Cu (3.41%) is the proper co-incorporation combination for enhancing the mechanical and tribological properties of the coatings.
Article
Chemistry, Physical
Ying Wang, Junhui He
Summary: A novel liquid-repellent anti-smudge hybrid coating was fabricated using TEOS and DMDEOS under acid catalysis, showing advantages of high transmittance, low sliding angles, and high sliding velocity. It effectively repels contamination and bacteria adhesion, with excellent durability and mechanical properties.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Pierre-Alexandre Royoux, Stephanie Ognier, Mengxue Zhang, Christophe M. Thomas, Michael Tatoulian
Summary: The oligomerization of 1-hexene under argon plasma was studied in a gas-liquid, continuous flow microreactor. The results showed that efficient conversion of 1-hexene into oligomers composed of 10 monomer units could be achieved, but light by-products were also formed.
REACTION CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Applied
Robbie Radjagobalou, Miguel Imbratta, Julie Bergraser, Marion Gaudeau, Gildas Lyvinec, Dominique Delbrayelle, Olivier Jentzer, Jeremy Roudin, Benjamin Laroche, Stephanie Ognier, Michael Tatoulian, Janine Cossy, Pierre-Georges Echeverria
Summary: A selective photochemical monochlorination of 2-fluorotoluene has been developed using a continuous flow process, optimizing key reaction parameters to minimize the formation of dichlorinated by-products. The reaction has been successfully scaled up on a multi decagram scale.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2022)
Article
Physics, Applied
Gabriel Morand, Cedric Guyon, Pascale Chevallier, Manon Saget, Vincent Semetey, Diego Mantovani, Michael Tatoulian
Summary: Open-air plasma jets are widely used for large-scale coating deposition. This study successfully polymerized 3-aminopropyltrimethoxysilane (APTMS) on glass using a plasma jet, leading to the formation of primary amine groups. However, achieving high NH2 deposition density requires a compromise between NH2 retention and coating stability.
PLASMA PROCESSES AND POLYMERS
(2022)
Review
Materials Science, Multidisciplinary
Xiao Lin, Saijilafu, Xiexing Wu, Kang Wu, Jianquan Chen, Lili Tan, Frank Witte, Huilin Yang, Diego Mantovani, Huan Zhou, Chunyong Liang, Qiang Yang, Ke Yang, Lei Yang
Summary: This review systematically summarizes and analyzes the biological effects and related mechanisms of Mg-based alloy degradation on biological systems. The restorative potential of Mg-based alloys for tissue repair and regeneration is also summarized, along with discussions on biosafety evaluation and design strategies.
INTERNATIONAL MATERIALS REVIEWS
(2023)
Article
Biochemistry & Molecular Biology
Luiz Bruno De Sousa Sabino, Francesco Copes, Solene Saulais, Edy Sousa De Brito, Ivanildo Jose Da Silva Junior, Tien Canh Le, Mircea Alexandru Mateescu, Diego Mantovani
Summary: Anthocyanins obtained from jambolan have been used in different carboxymethyl starch-based tablet formulations, with their release profiles evaluated in simulated gastric fluids and simulated intestinal fluids. The interaction between anthocyanins and carboxymethyl starch was found to be strong, and tablet dissolution behavior varied according to the pH of the media. Monolithic carboxymethyl starch tablets loaded with powdered jambolan extract efficiently delivered anthocyanins to different sites of the simulated gastrointestinal tract and maintained their antioxidant activity.
Article
Chemistry, Physical
Pedram Sotoudeh Bagha, Carlo Paternoster, Mehrdad Khakbiz, Saeed Sheibani, Navid Gholami, Diego Mantovani
Summary: Fe-Mn-based alloys have gained attention for their tunable mechanical properties and degradation behavior suitable for biomedical applications. However, their corrosion rate is often too low for cardiovascular device applications. In this study, a resorbable bimodal multi-phase alloy was designed to accelerate the corrosion rate, but concerns of toxicity arose. Surface modification with nitrogen plasma immersion ion implantation was used to control the corrosion rate and improve cell viability.
Article
Chemistry, Physical
Sofia Gambaro, M. Lucia Nascimento, Masoud Shekargoftar, Samira Ravanbakhsh, Vinicius Sales, Carlo Paternoster, Marco Bartosch, Frank Witte, Diego Mantovani
Summary: This study tested MgF2-coated screws made of a Mg-2Y-1Mn-1Zn alloy as potential biodegradable implants, showing a controlled corrosion rate compared to non-coated screws. The electrochemical tests confirmed the effectiveness of the MgF2 coating in slowing down the corrosion of the magnesium-alloy screws. The results demonstrate the importance of this coating technology for biomedical products.
Article
Chemistry, Multidisciplinary
Pascale Chevallier, Helton Jose Wiggers, Francesco Copes, Cecilia Zorzi Bueno, Diego Mantovani
Summary: Healthcare-associated infections (HAIs) are a global burden, causing significant mortality and financial costs. Microbiological contamination of implantable medical devices is an important cause of HAIs. A novel antimicrobial drug-eluting system was developed using chitosan and loaded with gentamicin, a broad-spectrum antibiotic. The addition of tannic acid and iron decreased swelling and degradation, resulting in sustained gentamicin release for up to 35 days.
Article
Crystallography
Souhila Ould Mohamed, Sofia Gambaro, Ana Laura Ramirez-Ledesma, Carlo Paternoster, Diego Mantovani
Summary: Zn alloys have drawn attention as potential materials for cardiovascular applications due to their corrosion behavior and mechanical properties. The interaction of Zn with body fluids was studied by investigating the corrosion pattern and degradation products' formation. The study found that a mixed degradation layer mainly composed of ZnO with Zn-3(PO4)(2)4 center dot H2O and Zn(CO3)(2) precipitates was found on surfaces immersed in HSS and PSS, while a ZnO/ZnCl2 layer was found on the surface immersed in NSS, which also revealed a higher corrosion rate.
Article
Chemistry, Physical
Guilherme Bedeschi Calais, Joao Batista Maia Rocha Neto, Rogerio Aparecido Bataglioli, Pascale Chevalier, Junko Tsukamoto, Clarice Weis Arns, Diego Mantovani, Marisa Masumi Beppu
Summary: The development of polypropylene masks coated with organic antimicrobial agents and Cu2+ salts showed significant reduction in viral titer, highlighting the potential of bioactive textile coatings to enhance mask efficacy. The presence of copper ions enhanced the virucidal effect, rapidly inhibiting the virus. This hybrid coating, with copper fast release and PEI prolonged inhibition effect, is suitable for rapid inactivation of the virus, improving protection against viral infections.
APPLIED SURFACE SCIENCE
(2023)
Review
Biochemistry & Molecular Biology
Dalila Di Francesco, Alexa Pigliafreddo, Simona Casarella, Luca Di Nunno, Diego Mantovani, Francesca Boccafoschi
Summary: The clinical demand for tissue-engineered vascular grafts is increasing, and there are many challenges to obtain functional small-diameter grafts. Advances in cell culture, biomaterials, manufacturing techniques, and tissue engineering methods have led to promising solutions for vascular graft production. The use of natural materials as scaffolds for vascular tissue engineering has gained attention and new strategies have been developed to overcome the drawbacks.
Article
Nanoscience & Nanotechnology
Pedro U. Munoz-Gonzalez, J. M. Flores-Moreno, Irais A. Quintero-Ortega, Diego Mantovani, Birzabith Mendoza-Novelo, Gerardo Gonzalez-Garcia
Summary: This study reports a simple method for synthesizing silicon nanoparticles (SiNps) dispersed in water. The SiNps exhibit small size, good structure, and fluorescence, making them suitable as cell fluorescent trackers. Furthermore, the SiNps show cytocompatibility and exert an anti-inflammatory effect on macrophages, suggesting their potential as immunomodulatory biomaterials.
ACS APPLIED NANO MATERIALS
(2023)
Article
Health Care Sciences & Services
Simon Berthelot, Yves Longtin, Manuele Margni, Jason Robert Guertin, Annie Leblanc, Tania Marx, Khadidiatou Mangou, Ariane Bluteau, Diego Mantovani, Sergey Mikhaylin, Frederic Bergeron, Valerie Dancause, Anne Desjardins, Nadia Lahrichi, Danielle Martin, Charles Jerome Sossa, Philippe Lachapelle, Stephane Schaal, Isabelle Genest, Anne Gignac, Stephane Tremblay, Eric Hufty, Lynda Belanger, Erica Beatty
Summary: This study aims to evaluate the eco-efficient use of personal protective equipment (PPE) in emergency departments (EDs). It will assess the clinical effectiveness, financial cost, and ecological footprint of PPE use. The first three phases have started, with results expected in 2024.
JMIR RESEARCH PROTOCOLS
(2023)
Article
Chemistry, Multidisciplinary
Elias Abedelnour, Stephanie Ognier, Olivier Venier, Laurent Schio, Michael Tatoulian, Janine Cossy
Summary: This study presents the direct synthesis of trifluoromethyl N,N-aminals from nitrogen containing heterocycles using argon plasma in a continuous flow microreactor without any additives or metal catalysts. The transformation of these compounds to N-trifluoroethyl amines is also reported.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Elias Abedelnour, Stephanie Ognier, Mengxue Zhang, Laurent Schio, Olivier Venier, Janine Cossy, Michael Tatoulian
Summary: The direct N-acylation of amines by esters in a microreactor using argon plasma is presented, resulting in high yields of amides.
CHEMICAL COMMUNICATIONS
(2022)