Article
Chemistry, Physical
Z. Hayati, B. Hoomehr, F. Khalesi, K. Raeissi
Summary: Titanium dioxide-silica composite nanoparticles were synthesized using a verified Stober sol-gel method. The resulting nanoparticles consisted of titanium dioxide cores surrounded by ultrafine silica particles, forming a thin shell. These nanoparticles were deposited on a stainless steel substrate via electrophoretic deposition to enhance its biological response. The presence of a silica shell increased the surface roughness, eliminated cracks, and improved the adhesion and barrier performance of the coating.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Nesreen Dakhel Fahad, Nabaa Sattar Radhi, Zainab S. Al-Khafaji, Abass Ali Diwan
Summary: The performance of biomaterials in biological systems is critical for advancing biomedical implants. Duplex Stainless Steel alloys are the major biomaterials with significant characteristics. Functional coatings such as titanium dioxide (TiO2), Hydroxyapatite (HA), and zinc oxide (ZnO) have received considerable attention for surface bioactive modification of DSS alloy implants. Coating techniques play a key role in enhancing the biological characteristics of DSS alloys. These coatings were prepared using cold spray and analyzed for surface morphology, hardness, corrosion resistance, and antibacterial properties.
Article
Engineering, Civil
Aneta Dyner, Roman Major, Lukasz Major, Janusz Szewczenko, Krzysztof Lukaszkowicz, Karla Cech Barabaszova, Maciej Krzywiecki, Marcin Basiaga
Summary: This paper investigates the physicochemical and biological properties of titanium dioxide thin films deposited on 316LVM stainless steel for cardiovascular implants. The study found that the thin films improved cell response in vitro and did not cause damage to host cells. Furthermore, the films reduced hemolysis and had no significant effect on platelet activation and aggregation. The results suggest that the proposed surface modification is fully biocompatible for specific cardiovascular implants.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Ceramics
Mohammad Amin Ahmadzadeh, Alireza Sadeghi, Seyed Farshid Chini
Summary: A LaPO4 coating with corrosion resistance to liquid metal and metallophobic characteristics was prepared on stainless steel using EPD technique. The coating surface had a specific hierarchical structure and showed excellent resistance against three different liquid metals.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Evgeniy V. Orekhov, Andrey Yu. Arbenin, Elena G. Zemtsova, Darya N. Sokolova, Alexandra N. Ponomareva, Maxim A. Shevtsov, Natalia M. Yudintceva, Vladimir M. Smirnov
Summary: Modern materials science is actively developing methods for creating structures with specific ordering. Template synthesis is a widely-used approach, where the structure is ordered based on a template shape. In this study, a template electrochemical method was used to synthesize calcium hydroxyapatite (HAp) coatings, replicating a planar template texture during deposition. The developed approach has potential applications in obtaining micro-ordered hydroxyapatite structures on bone implants, improving their biomedical characteristics.
Review
Chemistry, Applied
Ziwei Zhu, Sifan Chen, Yue Zhang, Wei Wang
Summary: A environmentally friendly composite material was prepared by mechanical agitation, which can improve the corrosion resistance of stainless steel in diverse environments. The composite coating showed uniform dispersion, smooth surface and no cracks or holes. The long-term immersion test demonstrated the effective protection of the coating on the substrate.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Multidisciplinary
K. M. Bertsch, A. Nagao, B. Rankouhi, B. Kuehl, D. J. Thoma
Summary: The study examined the hydrogen embrittlement resistance of austenitic stainless steel parts manufactured using powder-bed-fed selective laser melting (SLM) and directed energy deposition (DED). The influence of hierarchical AM microstructures on mechanical response, microstructural evolution, and void formation was analyzed using multiscale electron microscopy. The presence of hydrogen affected ductility in DED materials, but had minimal impact on SLM or heat-treated materials, with microstructural features driving these different responses discussed.
Article
Chemistry, Applied
Haiqiang Yu, Quanzhong Guo, Chuan Wang, Gongwang Cao, Yuwei Liu
Summary: Compact PANI coating and PANI/CNTs composite coating were prepared on the surface of 316 stainless steel bipolar plate through a new method of pulse electrodeposition. The PANI coating prepared by pulse electrodeposition exhibited better uniformity and compactness compared to direct current electrodeposition. The addition of CNTs further enhanced the compactness, corrosion resistance, and electrical conductivity of the PANI coating. The PANI/CNTs coating showed an increased corrosion potential and reduced corrosion current density compared to the PANI coating. It also demonstrated improved interfacial contact resistance and lower contact resistance after the polarization process. These improvements make the PANI/CNTs coating suitable for bipolar plate protection.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Materials Science, Multidisciplinary
Donghai Du, Kai Sun, Gary S. Was
Summary: The study on neutron-irradiated cold-worked 316 stainless steel revealed that IASCC susceptibility remained essentially unchanged across different damage levels, with dislocation loops controlling irradiation hardening and preferential crack initiation sites being grain boundaries oriented nearly normal to the applied stress.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Multidisciplinary
Dominika Marcin Behunova, George Gallios, Vladimir Girman, Hristo Kolev, Maria Kanuchova, Silvia Dolinska, Miroslava Vaclavikova
Summary: The study demonstrated the deposition of graphene oxide on a stainless steel substrate and its potential environmental applications. Various characterization techniques were used to assess the structure, morphology, and properties of the material, showing that the morphology and stability of the structures are related to the pre-treatment of the stainless steel substrate. This approach offers a new route for the facile fabrication of advanced electrode coatings with potential environmental applications.
Article
Dentistry, Oral Surgery & Medicine
Lu Yin, Xuehong Xu, Chienyu Chu, Pingting Lin, Honglan Huang, Bizhu Luo, Changwei Yang
Summary: This study synthesized mesoporous titanium dioxide composite hydroxyapatite (TiO2-HAP) and evaluated its effectiveness in sealing dentine tubules. The results showed that TiO2-HAP group had lower contact angle, higher specific surface area, and wider range of pore size distribution. Most dentinal tubules in the TiO2-HAP group were blocked by white matter in a uniform manner, and crystals grew along the axial direction. The MTT assay indicated that TiO2-HAP had little effect on L929 cell line, suggesting its potential as a remineralization agent for enamel caries-like lesions.
Article
Materials Science, Multidisciplinary
Rafael Uribe, Andrea Uvillus, Omar Bonilla, Luis Lascano, Gema Gonzalez
Summary: This study evaluated the effect of a low magnetic field on the deposition of hydroxyapatite (HAp) on different metallic substrates. Results showed that the application of magnetic fields significantly impacted the mass:area ratio of HAp, while Ta and TaN coatings increased bioactivity and enhanced hydrophilicity of the metallic substrates.
Article
Environmental Sciences
Eva Jimenez-Relinque, Siaw Foon Lee, Lorenzo Plaza, Marta Castellote
Summary: This study presents an economical and efficient method for decolourising dye wastewater using industrial waste stainless steel slag as a catalyst support. Titanium dioxide was immobilised on the slag surface, and the composite material showed excellent photocatalytic and adsorption capacities for organic pollutants. The results suggest that the TiO2 loading and dispersion on the slag surface are crucial for achieving high catalytic performance, and the slag itself acts as an efficient adsorption trap. This conversion approach has great potential for practical applications in dye water treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Multidisciplinary Sciences
Mingxiang Zhang, Zheng Meng, Morteza Shariati
Summary: This study investigates the effect of microstructure on the formability of stainless sheet metals, particularly austenitic steels. The presence of strain-induced martensite in the microstructure of austenitic steels leads to hardening and reduced formability. Experimental and artificial intelligence methods are used to evaluate the formability of AISI 316 steels with different intensities of martensite. The results show that cold rolling negatively affects the formability of the stainless steels but significantly strengthens the sheets. The artificial neural fuzzy interfere system (ANFIS) exhibits satisfactory results in predicting major strains compared to experimental measurements.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Applied
Ehsan Vafa, Reza Bazargan-Lari, Mohammad Ebrahim Bahrololoom
Summary: In this study, a polyvinyl alcohol reinforced natural chitosan/bioactive glass composite coating was prepared on 316L stainless steel by electrophoretic deposition process. The 25% PVA concentration in the composite coating showed increased corrosion resistance and bio-stability compared to 15% and 20% PVA concentrations, with better bioactivity and hydroxyapatite forming ability in vitro observed with 20% PVA concentration.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Materials Science, Multidisciplinary
Seyed Elias Mousavi, Nastaran Naghshehkesh, Mohabbat Amirnejad, Hossein Shammakhi, Ali Sonboli
Summary: Gas-fueled high-velocity oxyfuel spraying was used to coat Ni-Al bronze with Stellite-6, improving mechanical properties and hardness. Delamination was found to be the dominant wear mechanism in the coating, while abrasive wear was dominant in the substrate. The corrosion performance of the coating was superior to the bare alloy, with a significantly larger capacitive resistance.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Gert Krauss, Florian Meichsner, Adrian Hochgesang, John Mohanraj, Sahar Salehi, Philip Schmode, Mukundan Thelakkat
Summary: The study demonstrates that PDPPs with high ethylene glycol content are crucial for the design of efficient mixed ion-electron conductors. These polymers exhibit high volumetric capacitance, high hole mobility, and outstanding cell compatibility in OECTs, making them promising for applications in in vitro and in vivo bioelectronics.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Cell & Tissue Engineering
Maximilian Hessenauer, Ravikumar Vaghela, Carolin Korner, Stephan von Horsten, Christoph Pobel, Daniel Gage, Claudia Muller, Sahar Salehi, Raymund E. Horch, Andreas Arkudas
Summary: The development of an intravital microscopy model allows for better observation of intravascular events in the AV loop, enabling evaluation of leukocyte-endothelial cell interactions, vascularization, and tissue formation. This provides a deeper understanding of cellular and molecular processes in tissue engineering within the AV loop, supporting the advancement of novel therapeutic applications.
TISSUE ENGINEERING PART C-METHODS
(2021)
Review
Engineering, Biomedical
Lena Vogt, Florian Ruther, Sahar Salehi, Aldo R. Boccaccini
Summary: PGS is a promising material for biomedical applications due to its tunable properties through synthesis parameters and specific chemical modifications, allowing for a wide range of applications. Recent developments in PGS-based biomaterials have shown significant progress in tissue engineering, drug delivery, and wound healing.
ADVANCED HEALTHCARE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Kim Sarah Koeck, Sahar Salehi, Martin Humenik, Thomas Scheibel
Summary: This study focuses on achieving good mechanical stability of collagen fibers through self-assembly during wet-spinning without the need for additional crosslinkers. The produced collagen fibers show fibril alignment and a unique D-band pattern, and are processed into hierarchical assemblies using textile-engineering techniques. These assemblies serve as excellent substrates for muscle microtissue formation, particularly at the muscle-tendon-junction (MTJ) where myoblasts and fibroblasts are co-cultured to develop an MTJ-model.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Indra Apsite, Sahar Salehi, Leonid Ionov
Summary: Soft actuators offer advantages such as flexibility, adaptability, and reconfigurability compared to conventional hard actuators, making them promising for applications in various fields. Intelligent materials can provide additional degrees of freedom for soft actuators, allowing them to change structure, properties, and shape under external signals. Utilizing intelligent materials can significantly reduce device size and enable applications not achievable by externally powered systems.
Article
Biochemistry & Molecular Biology
Juan Uribe-Gomez, Dennis Schoenfeld, Andres Posada-Murcia, Michel-Manuel Roland, Anja Caspari, Alla Synytska, Sahar Salehi, Thorsten Pretsch, Leonid Ionov
Summary: Thermoplastic polyurethane elastomer fabricated via touch spinning technique can mimic the structure of muscle tissues and has important advantages for engineering skeletal muscles.
MACROMOLECULAR BIOSCIENCE
(2022)
Article
Polymer Science
Sawan Shetty, Selvakumar Murugesan, Sahar Salehi, Alexandra Pellert, Melanie Scheibel, Thomas Scheibel, Srinivasan Anandhan
Summary: In this study, biocompatible ultrafine fibers based on talc nanosheets (TNS)/PVDF composites were fabricated, showing robust electromechanical responses. Piezoresponse force microscopy (PFM) was used to analyze ferroelectric and piezoelectric coefficients. The 0.5 wt% TNS dispersed ultrafine fibers exhibited well-defined ferroelectric characteristics with an enhanced piezoelectric coefficient (d(33)) of approximately 43.3 pm/V. The piezoelectric coefficients strongly depended on the morphology and electroactive phase fraction of the composite ultrafine fiber. In vitro cytotoxicity tests showed that the TNS/PVDF composite ultrafine fibers had no cytotoxic response and promoted cell viability. These TNS/PVDF piezoelectric ultrafine fibers are thus suitable for bioelectronics applications, especially as flexible wearable electronic devices and sensors.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Biomedical
Ravikumar Vaghela, Andreas Arkudas, Daniel Gage, Carolin Korner, Stephan von Hoersten, Sahar Salehi, Raymund E. Horch, Maximilian Hessenauer
Summary: The AV loop model is a key technique in tissue engineering that addresses the problem of vascular support. This study used a novel intravital microscopy approach to observe the process of vascularization in hydrogels. GelMA proved to be a better matrix compared to fibrin in terms of microvessel formation and network maturation. This study provides a new tool for understanding important events in tissue regeneration.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2022)
Article
Electrochemistry
Mohabbat Amirnejad, Mohammad Rajabi, Roohollah Jamaati
Summary: The effect of substrate crystallographic texture on hydroxyapatite coating properties was investigated on duplex-annealed Ti6Al4V alloy surfaces. The results showed that low-surface energy planes led to smaller deposits with higher nucleation rates, while high-surface energy planes resulted in higher surface roughness and lower crystallinity. The electrochemical test demonstrated that coatings with low-surface energy planes exhibited the highest protective efficiency.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Mohabbat Amirnejad, Mohammad Rajabi, Roohollah Jamaati
Summary: The study investigates the effect of crystallographic texture and microstructure on the biocorrosion behavior, wettability, and biocompatibility of Ti6A14V alloy. The results demonstrate that the different crystallographic planes and surface energy contribute to variations in water contact angle and corrosion rate, thus affecting the performance and biocompatibility of the biomaterial.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Cell Biology
Ravikumar Vaghela, Andreas Arkudas, Daniel Gage, Carolin Koerner, Stephan von Hoersten, Sahar Salehi, Raymund E. Horch, Maximilian Hessenauer
Summary: Due to limitations in current in vivo experimental designs, our understanding of vascular development and its implications for large-scale tissue engineering is limited. Thus, this study aimed to develop unique in vivo imaging chambers for live visualization of cellular processes in the arteriovenous (AV) loop model in rats. Two different types of chambers were developed and filled with modified gelatin hydrogel. Intravital microscopy (IVM) using fluorescein isothiocyanate (FITC)-labeled dextran and rhodamine 6G dye allowed visualization of leukocyte trafficking and examination of microvascular development in the AV loop for up to 21 days. The combination of these IVM chambers provides a comprehensive understanding of vascular development in the AV loop tissue engineering model.
Article
Biotechnology & Applied Microbiology
Thomas Gruhn, Camilo Ortiz Monsalve, Claudia Mueller, Susanne Heid, Aldo R. Boccaccini, Sahar Salehi
Summary: In this study, the dynamics of anisotropic fillers in fibrous structures with hydrogel-based matrices were analyzed using computational simulations. Microfabricated rods were used as anisotropic fillers in the fabrication of composite filaments and their orientation in the fibers was evaluated experimentally. The results showed that the fillers were not well aligned during the extrusion process, leading to a random distribution in the fibers.
BIOENGINEERING-BASEL
(2023)
Article
Biotechnology & Applied Microbiology
Jana Schulik, Sahar Salehi, Aldo R. Boccaccini, Stefan Schruefer, Dirk W. Schubert, Andreas Arkudas, Annika Kengelbach-Weigand, Raymund E. Horch, Rafael Schmid
Summary: This study compared the mechanical properties and the behavior of human umbilical vein endothelial cells (HUVECs) in three hydrogels (Alg/HA/Gel, ADA-GEL, and GelMA) for vascular tissue engineering. ADA-GEL and GelMA showed promising results for cell survival, migration, and sprouting, while Alg/HA/Gel did not provide a good environment for long-term survival of HUVECs.
BIOENGINEERING-BASEL
(2023)
Article
Chemistry, Physical
Abdolrasoul Pourghaz, Mohammad Rajabi, Marzieh Torabi, Mohabbat Amirnejad
Summary: In this study, CoCrFeMnNi high entropy alloy without carbon nanotube (HEA) and with 0.2 wt% CNT (HEA + CNT) were synthesized through mechanical alloying and spark plasma sintering. The addition of CNT reduced the crystallite size and improved the mechanical properties and corrosion resistance of the material.
