Novel Magnesium-Nanofluorapatite Metal Matrix Nanocomposite with Improved Biodegradation Behavior

In this paper, the apparent chain like core shell structure Fe 3 O 4 -SiO 2 -chitosan nanoparticles was synthesized by two step method with cross linking action of glutaraldehyde based on layer by layer tech nology, the composite particles were characterized by IR, XRD, TEM, SEM, EDS and VSM analytical meth ods, and the synthesis conditions of the product were studied. The results indicated that the diameter of the composite particles is about 106.5 nm, the parietal layer of chitosan is 20 nm, and after crosslinking action of glutaraldehyde, chitosan uniformaly coated the outer surface of Fe 3 O 4 -SiO 2 .

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“…What's more, magnetic nano particles have found a large number of applications in various scopes [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of nanocomposites Fe3O4–SiO2–chitosan based on lbl technology

Shi

Yang

et al. 2016

Glass Phys Chem

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“…9 Posthealing surgery is costly and accompanied by the risks for the patients. [11][12][13] Magnesium is an essential element in the human body; it dissolves in vivo due to its high level of activity. [11][12][13] Magnesium is an essential element in the human body; it dissolves in vivo due to its high level of activity.…”

Section: Introductionmentioning

confidence: 99%

“…10 The mentioned disadvantages can be avoided by using magnesium alloys as the biodegradable metallic implants. [11][12][13] Magnesium is an essential element in the human body; it dissolves in vivo due to its high level of activity. 14 It features better mechanical properties compared with the biodegradable polymeric materials; and its elastic modulus is closer to that of the natural bone leading to a reduction in stress shielding.…”

Section: Introductionmentioning

confidence: 99%

In vivo study of nanostructured akermanite/PEO coating on biodegradable magnesium alloy for biomedical applications

Razavi

Fathi

Savabi

et al. 2014

J Biomedical Materials Res

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The major issue for biodegradable magnesium alloys is the fast degradation and release of hydrogen gas. In this article, we aim to overcome these disadvantages by using a surface modified magnesium implant. We have recently coated AZ91 magnesium implants by akermanite (Ca2 MgSi2 O7 ) through the combined electrophoretic deposition (EPD) and plasma electrolytic oxidation (PEO) methods. In this work, we performed the in vitro and in vivo examinations of these coated implants using L-929 cell line and rabbit animal model. The in vitro study confirmed the higher cytocompatibility of the coated implants compare to the uncoated ones. For the in vivo experiment, the rod samples were implanted into the greater trochanter of rabbits and monitored for two months. The results indicated a noticeable biocompatibility improvement of the coated implants which includes slower implant weight loss, reduction in Mg ion released from the coated samples in the blood plasma, lower release of hydrogen bubbles, increase in the amount of bone formation and ultimately lower bone inflammation after the surgery according to the histological images. Our data exemplifies that the proper surface treatment of the magnesium implants can improve their biocompatibility under physiological conditions to make them applicable in clinical uses. © 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 103A: 1798-1808, 2015.

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“…Here we can distinguish between band-structures, molecular orbitals, defects and correlated features (polarons, excitons etc.). Theoretical models mainly concern graphene's intrinsic properties like band structure, band gap opening and doping (1,(25)(26)(27). The focus lies here on the Dirac cones at the Kpoint of the Brillouin-Zone (28)(29)(30)(31).…”

Section: Introductionmentioning

confidence: 99%

Multiple Auger Decay at Resonant Photo-Excitation in Carbon Thin Films

Richter¹,

Paloumpa²,

Friedrich³

et al. 2013

ECS Trans.

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We use resonant photoemission at the C1s edge to study the electronic structure of HOPG, graphene flakes and monolayer graphene. We find remarkable differences in the profile of the Auger decay channels, which we attribute to an additional multiple-Auger with a three-hole final state. A prerequisite for the appearance of this decay mechanism is the existence of localized excitonic states, which cause the appearance of the multiple Auger decay. We use those effects to identify the existence and the quantity of such defect states within the π*-band regime in carbon thin films, because the intensity of the three-hole Auger decay is varying with the defect density of the carbon films. We find that the appearance of the multiple Auger decay is different for multilayer and monolayer graphene. In particular the interaction of impurities leads to broadening of the C1s core levels. The threehole Auger decay spectroscopy is a new method to detect such contaminations with a high sensitivity.

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Novel Magnesium-Nanofluorapatite Metal Matrix Nanocomposite with Improved Biodegradation Behavior

Cited by 30 publications

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Synthesis and characterization of nanocomposites Fe3O4–SiO2–chitosan based on lbl technology

Synthesis and characterization of nanocomposites Fe3O4–SiO2–chitosan based on lbl technology

In vivo study of nanostructured akermanite/PEO coating on biodegradable magnesium alloy for biomedical applications

Multiple Auger Decay at Resonant Photo-Excitation in Carbon Thin Films

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