The effect of ionic and metallic silver on the crystalline phases developed in CaO–Al2O3–TiO2–P2O5 glasses

Banijamali, Sara; Yekta, B. Eftekhari; Aghaei, Alireza

doi:10.1016/j.jnoncrysol.2011.09.026

Cited by 16 publications

(4 citation statements)

References 36 publications

(47 reference statements)

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“…It is a well-known fact that physicochemical properties of ceramic materials play key roles in the development of employing them in biomedical applications. It has been acknowledged that alumina has high hardness and abrasion resistance properties (Banijamali, Yekta, & Aghaei, 2012;Liu, Fischer, & Dent, 2003). The surface energy and smoothness of alumina help in having exceptional wear and friction properties (Banijamali & Ebadzadeh, 2016;Portilla & Halik, 2014 phase, known as alumina, which its mechanical properties and chemical stability make it a promising candidate for skeletal regeneration (Thamaraiselvi & Rajeswari, 2004).…”

Section: The Physicochemical Surface Properties Of Aluminamentioning

confidence: 99%

Biocompatibility of alumina‐based biomaterials–A review

Rahmati

Mozafari

2018

Journal Cellular Physiology

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In today's medicine world, alumina-based biomaterials owing to their excellent biomechanical, and biocompatibility properties play a key role in biomedical engineering. However, the literature still suffers from not having a valid database regarding the protein adsorption and subsequently cell responses to these surfaces. Proteins by adsorption on biomaterials surfaces start interpreting the construction and also arranging the biomaterials surfaces into a biological language. Hence, the main concentration of this review is on the protein adsorption and subsequently cell responses to alumina's surface, which has a wide range biomedical applications, especially in dentistry and orthopedic applications. In the presented review article, the general principles of foreign body response mechanisms, and also the role of adsorbed proteins as key players in starting interactions between cells and alumina-based biomaterials will be discussed in detail. In addition, the essential physicochemical, and mechanical properties of alumina surfaces which significantly impact on proteins and cells responses as well as the recent studies that have focused on the biocompatibility of alumina will be given. An in depth understanding of how the immune system interacts with the surface of alumina could prove the pivotal importance of the biocompatibility of alumina on its success in tissue engineering after implantation in body.

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Section: The Physicochemical Surface Properties Of Aluminamentioning

confidence: 99%

Biocompatibility of alumina‐based biomaterials–A review

Rahmati

Mozafari

2018

Journal Cellular Physiology

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“…Recently, the role of silver in the structure and stability of glasses has been investigated in soda-lime silicate 29 and lead lithium borate glasses, 30 and in more complicated glass systems, such as P 2 O 5 −CaO−Na 2 O glass, 31 SiO 2 −CaO− P 2 O 5 ternary systems, 32 and CaO−Al 2 O 3 −TiO 2 −P 2 O 5 glasses. 33 The diffusion mechanism and precipitation of silver are closely related to the modifications of the glass network by different metal oxides: modifier (Ag and non-Ag alike) concentrations greatly influence the transport parameters of Ag ions, 34 while precipitation of silver nanoparticles is due to the reduction of Ag + ions by means of extracting electrons from non-bridging oxygens in silica glass through a complicated chemical process involving the decomposition of Ag 2 O. 35 The addition of high-field-strength ions restricts the number of ionic non-bridging oxygens and silver reduction.…”

Section: Introductionmentioning

confidence: 99%

Structural Origin of the Optical Properties of Ag-Doped Fluorophosphate and Sulfophosphate Glasses

et al. 2021

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Given the ubiquity of glass formulations that are functionalized with silver compounds, the electronic interaction between isolated silver cations and the glass network deserves more attention. Here, we report the structural origin of the optical properties that result from silver doping in fluorophosphate (PF) and sulfophosphate (PS) glasses. To achieve this, solid-state nuclear magnetic resonance (NMR) spectroscopy and density functional theory (DFT) are combined with optical spectroscopic analysis and physical property measurements. Comparing the 31 P NMR, 27 Al 1d NMR, and 27 Al multi-quantum magic-angle spinning NMR of doped glasses and glasses with large amounts of Ag + added, we deduce silver's bonding preference in these mixed-anion aluminophosphate glasses. We show that such understanding provides an explanation for the large Stokes shift observed for Ag + in PF and PS glasses, which is related to absorption by the ionic Ag + ••• − O−P species and transfer of the excitation energy within more covalently bonded Ag 2 O-like clusters. This is corroborated by DFT calculations, which show that the Ag + ••• − O−P and Ag + ••• − O−S bonds in corresponding crystals are mostly ionic. The introduction of more silver ions into the crystal structure results in more covalent bonding between Ag + and the phosphate matrix.

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“…In addition, as is shown in Table 1, the introduction of AgNO 3 compound leads to a decrease in the glass density, which means the compactness reduction of glass network due to the occupation of Ag NPs in the free space regions in the network structure and therefore decreases the glass transition temperature [28,29].…”

Section: Thermal Stability and Structural Behaviormentioning

confidence: 98%