A comparative outlook of corrosion behaviour and chlorophyll assisted growth kinetics of various carbon nano-structure reinforced hydroxyapatite-calcium orthophosphate coating synthesized in-situ through pulsed electrochemical deposition

Chakraborty, Rajib; Manna, Jhimli Sarkar; Das, Dibyendu; Sen, Mainak; Saha, Partha

doi:10.1016/j.apsusc.2018.12.217

Cited by 18 publications

(9 citation statements)

References 47 publications

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“…Many nanopores were observed on the surface of the apatite granules (Figure c). These nanoporous structures have been shown to be beneficial for the subsequent adsorption of proteins and important minerals, which will also affect cell attachment and growth . Qualitatively, apatite particles on the surface of the sMG2-H sample were smaller than those on sMG3-H.…”

Section: Resultsmentioning

confidence: 98%

“…SEM images provided a direct view of the mineralized samples, where both surfaces were covered with a dense layer of granulated apatites and initially adsorbed sMGs were completely buried (Figure a,b). Compared with other shapes of apatites, this spherical structure could increase surface areas, which has been suggested to be more conducive to faster cell growth and tissue integration …”

Section: Resultsmentioning

confidence: 99%

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Silicification of Amine-Epoxide Cationic Microgels: An In Vitro Investigation

Sun

Cheng

2021

Langmuir

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Herein, the applicability of an unconventional, non-vinylic type of amine-epoxide microgels (MGs) to promote silica deposition from tetraethyl orthosilicate (TEOS) was investigated. Simply mixing MGs with TEOS in water at 25 °C resulted in the formation of hybrid silica-MG particles (sMGs) as a function of silicification time. The sMGs were cationic with thermal-sensitive swelling capability. Extending silicification time to 24 h was shown to increase silica content to 43%. Besides, the sMGs became structurally more rigid to resist drying-induced deformation and exhibited a rugged surface texture. Mechanistically, the aminated nature of the MGs was proved beneficial for the success of their silicification, fulfilling dual functions of the catalyst for TEOS hydrolysis and template for silica deposition. Through electrostatic adsorption, the sMGs provided a facile yet robust option for surface modifications toward bone-related applications. Surface-induced mineralization in simulated biological fluids was observed with sMG-immobilized surfaces, where the presence of hydroxyapatite was characterized in the deposited apatite. In vitro MC3T3-E1 pre-osteoblast cell studies showed that cell adhesion, morphology, and proliferation could be influenced by both sMG types and their adsorption density. Of particular interest is the finding of cells exhibiting elongated and greatly polarized morphology on the surface with high adsorption density of sMGs of 43% silica. It was postulated that the rugged appearance of such sMGs could have presented a hierarchically structured surface toward cells, an interesting aspect to be further exploited for the engineering of cell−surface interactions.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Silicification of Amine-Epoxide Cationic Microgels: An In Vitro Investigation

Sun

Cheng

2021

Langmuir

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“…For an unannealed F-HA coating (Figure c), the characteristic peaks of HA and/or Ti were not observed, but new peaks at 36.5° were attributed to the calcium phosphate (JCPDS# 44–0752), indicating that a new apatite layer has completely covered the surface of the titanium substrate. This revealed that the calcium phosphate crystal phase on the surface of the annealed F-HA coating tends to transform into the HA phase after SBF immersion …”

Section: Results and Discussionmentioning

confidence: 99%

“…This revealed that the calcium phosphate crystal phase on the surface of the annealed F-HA coating tends to transform into the HA phase after SBF immersion. 34 The F-HA coating can form a nanoscale porous threedimensional structure after immersion. This is because of the presence of F in the F-HA coating, which induces the mineralization and crystallization of calcium phosphate in SBF.…”

Section: Methodsmentioning

confidence: 99%

Formation of Porous Apatite Layer after Immersion in SBF of Fluorine-Hydroxyapatite Coatings by Pulsed Laser Deposition Improved in Vitro Cell Proliferation

Cao

Lian

Liu

2020

ACS Appl. Bio Mater.

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Fluorine (F), a trace element in bone tissues, promotes cell proliferation and colonization. In this study, fluorinehydroxyapatite (F-HA) coating was manufactured onto titanium substrates using pulsed laser deposition (λ = 1024 nm). The results confirmed that the surface roughness of F-HA coatings was the highest when the deposition time was 60 min. To evaluate the biological activity of the coatings, the coatings were immersed in simulated body fluids at 37 °C for 7 days. It was clearly observed that a new apatite layer showed a micro/nano foam-like porous structure. After annealing treatment, the F-HA coating can promote the transformation of the calcium phosphate crystal phase into the HA phase. Moreover, the mass of F-HA coatings with annealing was increased by 2.3% after immersion. In vitro cytocompatibility of the coatings was evaluated; the cell adhesion and proliferation exposed to F-HA coatings were significantly stimulated and promoted when compared with the control group in the first and second weeks of co-culture (p < 0.05). Thus, F-HA coatings can potentially act as osteoinductive materials for surface functionalization of the bone tissue scaffold.

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“…Such coatings were also prepared on AZ31 magnesium alloy by ECD and EPD [114], resulting in decreasing seriously corrosion density from 44.2 to 0.7 µA/cm 2 . In [115], different carbon nanostructures, namely exfoliated graphene, RGO, and MWCNTs were co-deposited along with in-situ formed HAp-Ca-P phases. The MWCNTs were deposited together with HAP also by the EPD technique [116,117].…”

Section: Ceramics-ceramics Coatingsmentioning

confidence: 99%

Electrodeposited Biocoatings, Their Properties and Fabrication Technologies: A Review

Zieliński¹,

Bartmański²

2020

Coatings

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Coatings deposited under an electric field are applied for the surface modification of biomaterials. This review is aimed to characterize the state-of-art in this area with an emphasis on the advantages and disadvantages of used methods, process determinants, and properties of coatings. Over 170 articles, published mainly during the last ten years, were chosen, and reviewed as the most representative. The most recent developments of metallic, ceramic, polymer, and composite electrodeposited coatings are described focusing on their microstructure and properties. The direct cathodic electrodeposition, pulse cathodic deposition, electrophoretic deposition, plasma electrochemical oxidation in electrolytes rich in phosphates and calcium ions, electro-spark, and electro-discharge methods are characterized. The effects of electrolyte composition, potential and current, pH, and temperature are discussed. The review demonstrates that the most popular are direct and pulse cathodic electrodeposition and electrophoretic deposition. The research is mainly aimed to introduce new coatings rather than to investigate the effects of process parameters on the properties of deposits. So far tests aim to enhance bioactivity, mechanical strength and adhesion, antibacterial efficiency, and to a lesser extent the corrosion resistance.

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A comparative outlook of corrosion behaviour and chlorophyll assisted growth kinetics of various carbon nano-structure reinforced hydroxyapatite-calcium orthophosphate coating synthesized in-situ through pulsed electrochemical deposition

Cited by 18 publications

References 47 publications

Silicification of Amine-Epoxide Cationic Microgels: An In Vitro Investigation

Silicification of Amine-Epoxide Cationic Microgels: An In Vitro Investigation

Formation of Porous Apatite Layer after Immersion in SBF of Fluorine-Hydroxyapatite Coatings by Pulsed Laser Deposition Improved in Vitro Cell Proliferation

Electrodeposited Biocoatings, Their Properties and Fabrication Technologies: A Review

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