Synthesis, microstructure and biodegradation behavior of nano-Si and nano-ZnO/Si coatings on a Mg/HA/TiO2/MgO nanocomposite

Khalajabadi, Shahrouz Zamani; Kadir, Mohammed Rafiq Abdul; Izman, S.; Samavati, Alireza; Othaman, Zulkafli

doi:10.1016/j.ceramint.2015.05.093

Cited by 13 publications

(3 citation statements)

References 64 publications

(79 reference statements)

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“…As was reported by Li et al [34], the silicon coating was deposited on the surface of WE43 Mg alloy using Plasma-enhanced chemical vapor deposition (PECVD) technique to slow down its degradation rate for medical applications. Moreover, the corrosion resistance and mechanical properties of Mg/HA/TiO 2 /MgO nanocomposites were enhanced by Si monolayer and Si/ZnO double-layer coatings fabricated using radio frequency magnetron sputtering technique [35]. Silicon (Si), as an essential mineral in human bodies, is substituted alone or in combination with a variety of other materials for filling bone defects [36].…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Mg/HA/TiO2 Nanocomposites Coated with MgO and Si/MgO for Orthopedic Applications: A Study on the Corrosion, Surface Characterization, and Biocompatability

et al. 2017

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Abstract:In the field of orthopedics, magnesium (Mg) and magnesium-based composites as biodegradable materials have attracted fundamental research. However, the medical applications of magnesium implants have been restricted owing to their poor corrosion resistance, especially in the physiological environment. To improve the corrosion resistance of Mg/HA/TiO 2 nanocomposites, monolayer MgO and double-layer Si/MgO coatings were fabricated layer-by-layer on the surface of a nanocomposite using a powder metallurgy route. Then, coating thickness, surface morphology, and chemical composition were determined, and the corrosion behavior of the uncoated and coated samples was evaluated. Field-emission scanning electron microscopy (FE-SEM) micrographs show that an inner MgO layer with a porous microstructure and thickness of around 34 µm is generated on the Mg/HA/TiO 2 nanocomposite substrate, and that the outer Si layer thickness is obtained at around 23 µm for the double-layered coated sample. Electrochemical corrosion tests and immersion corrosion tests were carried out on the uncoated and coated samples and the Si/MgO-coated nanocomposite showed significantly improved corrosion resistance compared with uncoated Mg/HA/TiO 2 in simulated body fluid (SBF). Corrosion products comprising Mg(OH) 2 , HA, Ca 3 (PO 4 ) 2 , and amorphous CaP components were precipitated on the immersed samples. Improved cytocompatibility was observed with coating as the cell viability ranged from 73% in uncoated to 88% for Si/MgO-coated Mg/HA/TiO 2 nanocomposite after nine days of incubation.

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Section: Introductionmentioning

confidence: 99%

Biodegradable Mg/HA/TiO2 Nanocomposites Coated with MgO and Si/MgO for Orthopedic Applications: A Study on the Corrosion, Surface Characterization, and Biocompatability

et al. 2017

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“…Therefore, doping HAp with Zn 2+ will not necessarily provide the same benefits provided by ZnO. Another approach involves the fabrication of ZnO-HAp coating by different techniques, such as spin-coating, spraying, electrohydrodynamic atomization (EDHA), and sputtering . The main disadvantages of these techniques are expensive equipment and insufficient control on the coating process.…”

Section: Introductionmentioning

confidence: 99%

“…Another approach involves the fabrication of ZnO-HAp coating by different techniques, such as spin-coating, 16 spraying, 17 electrohydrodynamic atomization (EDHA), 18 and sputtering. 19 The main disadvantages of these techniques are expensive equipment and insufficient control on the coating process. For instance, application of spin-coating to complex geometries such as dental implants is inapplicable.…”

Section: ■ Introductionmentioning

confidence: 99%

Composition-Tailoring of ZnO-Hydroxyapatite Nanocomposite as Bioactive and Antibacterial Coating

Geuli

Lewinstein

Mandler

2019

ACS Appl. Nano Mater.

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Overcoming postimplantation infections is considered as a major challenge in medicine, where continuous efforts have been invested in developing bactericidal functional coatings. The synergic combination of hydroxyapatite (HAp) and ZnO holds beneficial properties, such as excellent bioactivity that is reinforced with its antibacterial nature. Here, highly phase tunable pure ZnO-HAp nanocomposite coatings were fabricated via electrophoretic deposition. HAp and ZnO nanoparticles were synthesized separately, dispersed simultaneously, and coelectrophoretically deposited onto a titanium substrate. By manipulating the deposition potentials, a single-stage graded-coating of ZnO-HAp was successfully obtained. In addition, by controlling the composition of the nanomaterials in the dispersions, we managed to precisely tailor composite coatings with a dictated phase ratio between ZnO and HAp. In vitro studies, bioactivity, cytotoxicity, and antibacterial tests, showed excellent performance by enhancing the mineralization of the coating and improving cells proliferation while successfully eradicating E. coli bacteria.

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In vitro degradation, cytocompatibility and hemolysis tests of CaF 2 doped TiO 2 -SiO 2 composite coating on AZ31 alloy

Chen

Huang

et al. 2016

Applied Surface Science

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Synthesis, microstructure and biodegradation behavior of nano-Si and nano-ZnO/Si coatings on a Mg/HA/TiO2/MgO nanocomposite

Cited by 13 publications

References 64 publications

Biodegradable Mg/HA/TiO2 Nanocomposites Coated with MgO and Si/MgO for Orthopedic Applications: A Study on the Corrosion, Surface Characterization, and Biocompatability

Biodegradable Mg/HA/TiO2 Nanocomposites Coated with MgO and Si/MgO for Orthopedic Applications: A Study on the Corrosion, Surface Characterization, and Biocompatability

Composition-Tailoring of ZnO-Hydroxyapatite Nanocomposite as Bioactive and Antibacterial Coating

In vitro degradation, cytocompatibility and hemolysis tests of CaF 2 doped TiO 2 -SiO 2 composite coating on AZ31 alloy

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