Article
Materials Science, Coatings & Films
Joel da Silva Rodrigues, Leonardo Marasca Antonini, Antonio Alexandre da Cunha Bastos, Jie Zhou, Celia de Fraga Malfatti
Summary: The study applied plasma electrolytic oxidation (PEO) to create a coating on a magnesium alloy, ZK30, enhancing its corrosion resistance and wear resistance for potential orthopedic applications involving friction and wear. This technology has shown promising results in reducing hydrogen release, decreasing susceptibility to localized corrosion, and altering surface topography and chemistry.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Electrochemistry
Masoud Atapour, Saber Sanaei, Zheng Wei, Mohammadali Sheikholeslam, Jeffrey D. Henderson, Ubong Eduok, Yara K. Hosein, David W. Holdsworth, Yolanda S. Hedberg, Hamid Reza Ghorbani
Summary: Biomedical cobalt-chromium-molybdenum alloys are commonly used for orthopedic and dental implants. Laser powder bed fusion is an additive manufacturing method used to produce these alloys, resulting in different microstructures and surface roughness based on the building direction. This study examined the corrosion resistance, bioactivity, and biocompatibility of LPBF CoCrMo in different building directions and found that it had minimal effect on corrosion. The surfaces showed satisfactory biocompatibility and bioactivity.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Jithu Jayaraj, A. Srinivasan, C. Arunchandran, V. Rajinikanth
Summary: This study proposes a two-stage chemical conversion coating process for magnesium alloys. The results show that the water-based coating has self-healing characteristics, while the ethanol-based coating has better corrosion resistance. Both coatings exhibit acceptable cell viability under physiological conditions.
APPLIED SURFACE SCIENCE
(2024)
Article
Materials Science, Ceramics
Tianxiao Wang, Yunqian Dong, Yingchao Xu, Guangyu Li, Yunting Guo, Jianshe Lian, Zhihui Zhang, Luquan Ren
Summary: Biodegradable magnesium alloy is limited in medical implant applications due to its fast degradation. The aim of this study was to enhance corrosion resistance by designing a calcium phosphate dihydrate/graphene oxide composite coating on the AZ60 alloy. Graphene oxide was added to the solution to modify the deposition process and it resulted in a compact composite coating with improved corrosion resistance. In-vitro cell experiments also showed good biocompatibility of the composite coating.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yingjun Zhang, Shuai Xiao, Jie Wen, Xinyu Liu, Baojie Dou, Liu Yang
Summary: The study focuses on the effect of preparation methods of PANI and GO composite powders on the protective performance of epoxy coatings for magnesium alloys. The results show that the coating prepared with PANI and GO composite powders by in situ polymerization exhibits higher impedance value, better flexibility, impact resistance, and adhesion strength compared to coatings prepared with pure PANI or PANI and GO mixed powders.
Article
Metallurgy & Metallurgical Engineering
Zeeshan Ur Rahman, Maqsood Ali, Ye-Tang Pan, David G. Churchill, Bon Heun Koo
Summary: In this study, the addition of (EDTA)4- in alkaline silicates electrolyte was found to result in thick and layered pancake-like materials with minimum cracks and porosity. The analysis also revealed that EDTA can significantly alter the surface layers composition and act as a passivation agent. However, no individual polycrystalline phases were formed. The corrosion potential of the coated AZ91 was positive, but the results were not consistent with the cyclic polarization tests.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Biophysics
S. Thanka Rajan, Mitun Das, A. Arockiarajan
Summary: The study demonstrates that the development of niobium and niobium oxide thin films on Mg alloys using sputtering technique can improve the corrosion resistance and biocompatibility of the alloys. The thin-film coated Mg alloys exhibited good corrosion resistance and cell proliferation capability.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Pablo Pou-Alvarez, Antonio Riveiro, Xose Ramon Novoa, Xueze Jin, Jesus del Val, Rafael Comesana, Mohamed Boutinguiza, Fernando Lusquinos, Julian R. Jones, Maria Teresa Perez-Prado, Juan Pou
Summary: The article introduces a new concept of locally controlling and guiding corrosion through laser surface treatment. Wet tests on AZ31 magnesium alloy samples show a 15-fold reduction in degradation rates with the treatment. Controlling the treatment conditions can restrict degradation to specific regions and drive it towards specific directions.
Article
Materials Science, Coatings & Films
Gengzhe Shen, Liuyan Zhang, Zhiwei Gu, Zhidong Zheng, Yuwen Liu, Guibin Tan, Xiaohua Jie
Summary: Zinc aluminum-layered double hydroxide (ZnAl-LDH) was grown in-situ on the low-pressure cold gas spraying (LPCGS) Al coating by hydrothermal method. The composite coating zinc aluminum-layered double hydroxide-Graphene oxide (LDH-G) was formed by electrostatic adsorption of graphene oxide (GO) and ZnAlLDH. LDH-G coating showed excellent reduction in wear and corrosion resistance, attributed to the good mechanical properties of graphene and the corrosion inhibition effect of ZnAl-LDH.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Huai Yao, Shubo Wang, Yi Xiong, Xinying Shi, Harishchandra Singh, Marko Huttula, Wei Cao
Summary: In this study, the microstructure, mechanical properties, and corrosion behavior of Mg-1.8Zn-0.5Zr alloys with different Gd additions were investigated. It was found that the grain size decreased gradually with Gd alloying. The mechanical properties and corrosion resistance of the alloys first improved and then weakened with increasing Gd content. The optimal mechanical properties and corrosion resistance were achieved with a 1.5 wt.% Gd addition. A three-stage corrosion mechanism was proposed through electrochemical measurements and corroded surface analyses.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Limin Li, Zhiquan Huang, Liwen Chen, Lulu Zhang, Muxi Li, Hua Hou, Yuhong Zhao
Summary: Magnesium-based materials have attracted extensive attention as biomedical implant materials due to their good mechanical properties and ability to degrade naturally in vivo. However, their high corrosion rate has limited their medical applications. In this study, the corrosion behavior of AZ91D magnesium alloy-graphene nanoplatelets (AZ91D-GNPs) composites in simulated body fluid solution was investigated. The results showed that the addition of 0.6 wt% GNPs in AZ91D composite exhibited the highest corrosion resistance with a corrosion rate of 2.7549 mm/a. Additionally, solution treatment effectively improved the corrosion resistance by reducing the corrosion rate by 81%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
S. Thanka Rajan, Mitun Das, A. Arockiarajan
Summary: In this study, tantalum oxide thin films were deposited onto the surface of AZ31B alloy using the sputtering process, and their biocompatibility and corrosion resistance were evaluated. The results showed that the Ta-based thin films significantly enhanced the corrosion resistance of the magnesium alloy, exhibited good bioactivity, and had good hemocompatibility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
A. S. Gnedenkov, S. L. Sinebryukhov, V. S. Filonina, V. S. Egorkin, A. Yu Ustinov, V. Sergienko, S. Gnedenkov
Summary: The electrochemical behavior of biodegradable magnesium alloy Mg-0.8Ca was evaluated using traditional and local scanning electrochemical methods. The corrosion rates and degradation process of the alloy were determined and the mechanism of bioresorption was proposed. The influence of alloy composition and microstructure on corrosion behavior and the composition of corrosion products were investigated. The study also highlighted the low applicability of uncoated Mg-0.8Ca alloy in implant surgery.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Metallurgy & Metallurgical Engineering
Jiarun Li, Zhuoyuan Chen, Jiangping Jing, Jian Hou
Summary: Alloying with yttrium can enhance the corrosion resistance of Mg-6%Al-3%Zn alloy, promote the protectiveness of the oxide layer, and provide an effective barrier to prevent corrosive ions from penetrating and reacting with the Mg matrix.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Sara Kamkar, Majid Mohammadi, Mohsen Karimi, Majid Salehi
Summary: Mono- and bilayer coatings were deposited on Ti-6Al-4V substrate using different methods to improve its corrosion resistance and biological properties. The results showed that the bilayer nitride coating exhibited better corrosion resistance and promoted cell growth compared to the monolayer coating and substrate.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
M. Shehata, S. M. Azab, A. M. Fekry
CANADIAN JOURNAL OF CHEMISTRY
(2020)
Article
Biochemical Research Methods
Gehad G. Mohamed, Amany M. Fekry, Fekria M. Abou Attia, Neveen S. Ibrahim, Shereen M. Azab
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
(2020)
Article
Engineering, Multidisciplinary
A. M. Fekry, S. A. Abdel-Gawad, R. H. Tammam, M. A. Zayed
Article
Chemistry, Analytical
M. Shehata, Amany M. Fekry, Alain Walcarius
Article
Chemistry, Physical
Azza A. Ghoneim, Renad S. El-Kamel, Amany M. Fekry
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Applied
M. A. Abd El-Ghaffar, N. A. Abdelwahab, Amany M. Fekry, M. A. Sanad, M. W. Sabaa, S. M. A. Soliman
PROGRESS IN ORGANIC COATINGS
(2020)
Article
Chemistry, Analytical
Amany M. Fekrya, Soha A. Abdel-Gawad, Shereen M. Azab, Alain Walcarius
Summary: A N/G/Z/MCPE sensor was successfully prepared for the sensitive detection of MOXI, exhibiting good electrocatalytic activity in phosphate buffer solution. The sensor showed high sensitivity and a linear response range, making it a promising tool for MOXI detection.
Article
Electrochemistry
Sabreen A. Baioumy, Wafaa A. Sanad, Ahmed A. El-Sherif, Amany M. Fekry, Lev O. Filippov
Summary: The study compared the performance of stainless steel and ceramic commercial cooking utensils under different temperatures, hydrogen evolution, and pH values, finding that nanocoating could achieve the lowest hydrogen evolution and release at low temperatures and high pH values.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Chemistry, Physical
Soha Abdel Gawad, Ahmed Nasr, Amany M. Fekry, Lev O. Filippov
Summary: Nanocomposite coatings of chitosan and cobalt nanoparticles showed excellent electrochemical corrosion resistance and reduced hydrogen evolution rate, making them effective for protecting and prolonging the lifespan of 316L stainless steel implants.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
H. Nady, M. M. El-Rabiei, Gh. M. Abd El-Hafez, A. M. Fekry
Summary: Niobium is considered a good electrocatalyst for cathodic hydrogen production, with its electrochemical performance affected by acid concentration, cathodic potential, and temperature. Electrochemical tests demonstrate that hydrogen evolution reaction on Nb electrode follows the Volmer-Heyrovsky mechanism.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Multidisciplinary
Amany M. Fekry, Shereen M. Azab, Fekria M. Abou Attia, Neveen S. Ibrahim, Gehad G. Mohamed
Summary: The multiwalled carbon nanotubes/Cellulose/Tween (MWCNTs/C/T/MCPE) reformed carbon paste electrode (CPE) was successfully developed as a highly sensitive and easy-to-use electrochemical sensor for the determination of Agomelatine (AGO) in various samples. The sensor displayed high sensitivity and selectivity towards AGO, with additional testing confirming stability, reproducibility, repeatability, interference, and coexistence with dopamine (DA). Further analysis of AGO in Inspago tablets, urine samples, and in the presence of dopamine demonstrated the method's high sensitivity and selectivity.
Article
Materials Science, Multidisciplinary
Renad S. Elkamel, Amany M. Fekry, Azza A. Ghoneim, Lev O. Filippov
Summary: The corrosion resistance of magnesium alloy is enhanced by a drug/nanopolymer coating specifically developed to provide protection and prevent inflammation and pain. Among the tested coatings, the GEL-NPs coating with glutaraldehyde as a crosslinker has the highest corrosion resistance and the lowest hydrogen evolution rate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Analytical
M. Zaki, Ezz El Shafie, Soha A. Abdel-Gawad, Amany M. Fekry, Renad S. El-Kamel, M. Shehata
Summary: A novel electrochemical sensor for nicotine detection has been successfully prepared by depositing manganese/copper nanoparticles on the surface of a carbon paste electrode. This sensor showed good catalytic activity for the anodic oxidation of nicotine in potassium phosphate buffer solutions of different pH values. It exhibited high sensitivity and stability for detecting nicotine in urine and tobacco samples.
Article
Engineering, Chemical
Lev O. Filippov, Inna V. Filippova, Amany M. Fekry, Daniel Fornasiero
Summary: Flotation separation of carbonate minerals is challenging due to their similar surface properties. This study explored the flotation of dolomite and magnesite under acidic to neutral pH conditions using oleate as collector and hydrochloric acid or phosphoric acid as pH regulator. It was found that the recovery of dolomite was unaffected by pH, whereas the recovery of magnesite decreased with acid addition, particularly when phosphoric acid was used. The results indicated that dolomite had a higher dissolution rate than magnesite at acidic pH, providing more calcium ions for interaction with the oleate collector. The findings were supported by infrared spectroscopic analysis, which showed a greater amount of oleate adsorption/precipitation on dolomite compared to magnesite. Furthermore, the presence of new PO4 species in the Raman and infrared spectra of these minerals at acidic pH suggested a potential surface passivation of magnesite, explaining the decrease in magnesite flotation when phosphoric acid was used as pH control.
MINERALS ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Elzahraa Ahmed Elgohary, Yasser Mahmoud A. Mohamed, Samira Taha Rabie, Said Abdelrahman Salih, Amany Mohamed Fekry, Hossam A. El Nazer
Summary: The study revealed that Pd/TiO2/MWCNT nanocomposites exhibit higher catalytic activity and selectivity for the production of cyclic carbonates. The protocol successfully transformed CO2 into cyclic carbonates at ambient temperature and under atmospheric pressure. Band gap energy estimations showed that Pd/TiO2/MWCNT and Pt/TiO2/MWCNT were more active catalysts compared to bare TiO2 or TiO2/MWCNT.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Biomaterials
Mohammadreza Kasravi, Alireza Yaghoobi, Tahereh Tayebi, Mahsa Hojabri, Abdolkarim Talebi Taheri, Fatemeh Shirzad, Bahram Jambar Nooshin, Radman Mazloomnejad, Armin Ahmadi, Fatemeh A. Tehrani, Ghasem Yazdanpanah, Mohammad Hadi Farjoo, Hassan Niknejad
Summary: As a promising approach in translational medicine, the decellularization of discarded livers to produce bioscaffolds that support recellularization has potential in overcoming the limitations of conventional liver transplantation. In this study, the researchers investigated the use of matrix metalloproteinase (MMP) inhibition to preserve the extracellular matrix (ECM) during liver decellularization. The results demonstrated that the application of an MMP inhibitor significantly improved the preservation of ECM components and mechanical properties of the bioscaffolds, which supported cell viability and function in vitro. The study also confirmed that the MMP inhibition led to the inhibition of MMP2 and MMP9, providing a novel method to enhance ECM preservation during liver decellularization.
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Mohammadsadegh Nadimifar, Weiguang Jin, Clara Coll-Satue, Gizem Bor, Paul Joseph Kempen, Ali Akbar Moosavi-Movahedi, Leticia Hosta-Rigau
Summary: This study presents a metal-phenolic self-assembly approach that can prepare nanoparticles fully made of hemoglobin. The nanoparticles exhibit good oxygen binding and releasing capabilities.
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Jyoti Kumari, Roel Hammink, Jochem Baaij, Frank A. D. T. G. Wagener, Paul H. J. Kouwer
Summary: Fibrosis is the formation of fibrous connective tissue in response to injury, leading to organ dysfunction. A novel hybrid hydrogel combining synthetic polyisocyanide with hyaluronic acid has been developed, showing strong antifibrotic properties.
BIOMATERIALS ADVANCES
(2024)
Letter
Materials Science, Biomaterials
Melissa Machado Rodrigues, Cristian Padilha Fontoura, Charlene Silvestrin Celi Garcia, Sandro Tomaz Martins, Joao Antonio Pegas Henriques, Carlos Alejandro Figueroa, Mariana Roesch Ely, Cesar Aguzzoli
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Jessica Polak, David Sachs, Nino Scherrer, Adrian Suess, Huan Liu, Mitchell Levesque, Sabine Werner, Edoardo Mazza, Gaetana Restivo, Mirko Meboldt, Costanza Giampietro
Summary: Human skin equivalents (HSEs) play a crucial role in tissue engineering. This study introduces a 3D-printed culture insert to apply a static radial constraint on HSEs and examines its effects on tissue characteristics. The results show that the diameter of the culture insert significantly influences tissue contraction, fibroblast and matrix organization, keratinocyte differentiation, epidermal stratification, and basement membrane formation. This study provides important insights for the design of skin tissue engineering.
BIOMATERIALS ADVANCES
(2024)
Review
Materials Science, Biomaterials
Shiliang Chen, Tianming Du, Hanbing Zhang, Jing Qi, Yanping Zhang, Yongliang Mu, Aike Qiao
Summary: This paper reviewed the primary methods for improving the overall properties of biodegradable zinc stents. It discussed the mechanical properties, degradation behavior, and biocompatibility of various improvement strategies. Alloying was found to be the most common, simple, and effective method for improving mechanical properties. Deformation processing and surface modification further improved the mechanical properties and biological activity of zinc alloys. Meanwhile, structural design could endow stents with special properties. Manufacturing zinc alloys with excellent properties and exploring their interaction mechanism with the human body are areas for future research.
BIOMATERIALS ADVANCES
(2024)
