Surface characterization of silver-doped bioactive glass

Verné, Enrica; Nunzio, Serena Di; Bosetti, Michela; Appendino, Pietro; Brovarone, Chiara Vitale; Maina, Giovanni; Cannas, M.

doi:10.1016/j.biomaterials.2005.01.038

Cited by 151 publications

(116 citation statements)

References 28 publications

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“…The coloration of the sample prepared at 150°C for 30 min matches with the color of the sample processed at 300°C for 5 min. The colors of the products obtained in this work were similar to previous reports [4,11].…”

Section: Characterizationsupporting

confidence: 91%

“…Generally, the nanoparticle-doped materials have several advantages, such as high performance, low price (compared to pure silver), high chemical durability and low release silver ions for a long period of time [7,8]. There are several methods for preparing silver-doped silica including multi-target sputtering [2,9], sol-gel process [4] and ion exchange process [10,11]. For example, spherical nanoparticles with a silver core and an amorphous silica shell were successfully fabricated using tetraethoxysilane as silica precursor and reducing silver nitrate with ascorbic acid.…”

Section: Introductionmentioning

confidence: 99%

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Antibacterial silver-doped bioactive silica gel production using molten salt method

2016

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Due to broad-spectrum antimicrobial activity, silver nanoparticles have great application potential in disinfection of contaminated water. The aim of this research was the introduction of a fast and simple method titled as ''molten salt method'' for the production of silverdoped bioactive silica gel (SG) nanocomposite. In this method, SG was imposed into the molten salt of silver nitrate at 150 and 300°C for various times. Interestingly, molten salt method was not utilized any reducing reagent or other chemicals unless molten silver nitrate. The synthesis and fixing of nanoparticles into the support were done in \60 min. The prepared silver/SG nanocomposite was evaluated using scanning electron microscope (SEM), energy dispersive X-ray fluorescence, leaching test and antibacterial test. SEM images showed that the contact of SG with the molten salt caused the formation of nanoparticles on the SG. On the other hand, increasing the contact time, it led to a larger and increased number of particles. The antibacterial tests demonstrated that this composite is suitable for using as antibacterial material. The test of elution with water indicated that the prepared nanocomposite is stable and the amount of the released silver in the water was negligible.

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Section: Characterizationsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Antibacterial silver-doped bioactive silica gel production using molten salt method

2016

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“…3b and 3d), and show the combeite (Na 6 Ca 3 Si 8 O 18 ), SiO 2 and CaSiO 3 phases (Fig. 4) as shown in other synthesis processes where the peaks are associated even with the addition of dopants and after in vitro incubation processes [23,24]. …”

Section: Bioglass Compositionmentioning

confidence: 56%

45S5 Bioglass porous scaffolds: structure, composition and bioactivity characterization

Abad-Javier¹,

Cajero-Juárez²,

García³

2016

Epitoanyag - JSBCM

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Advanced ceramics development is a promising area in regenerative medicine; although there are different biomaterials with features that make them viable enough, their improvement and optimization is required to produce biomaterials easier to bio assimilate and promote a faster tissue recovery. At this work a nanostructured bioglass based biomimetic scaffold is developed, beginning with the sol-gel synthesis parameters establishment coupled with a spray drying stage. through X-ray diffraction the crystal na 6 ca 3 si 6 o 18 phase was characterized, this phase is common to find in almost every 45s5 bioglass different synthesis processes, also a standard of mammalian hydroxyapatite was prepared to be used as a comparative control in determining the bioglass scaffold bioactivity. three-dimensional structure was characterized by optical and scanning electron microscopy, coupled to a semi-quantitative technique (eDs) to determine the composition of the synthesized biomaterial. subsequently, simulated body fluid (sBF) was used as an in vitro system, whose composition emulates the ionic blood concentration to evaluate the scaffold bioactivity.

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“…The difference in initial release rates between these two media can be explained by the possible formation of insoluble salt crystals on the coating surface in the saline solution. Such precipitates would not be detected by GF-AAS [23]. As the availability of free silver ions decreases in anionic media, the amount of antibacter-…”

Section: Resultsmentioning

confidence: 99%

Prevention of Staphylococcus epidermidis biofilm formation using a low-temperature processed silver-doped phenyltriethoxysilane sol–gel coating

Stobie

Duffy

McCormack³

et al. 2008

Biomaterials

161

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Sol-gel coatings which elute bioactive silver ions are presented as a potential solution to the problem of biofilm formation on indwelling surfaces. There is evidence that high-temperature processing of such materials can lead to diffusion of silver away from the coating surface, reducing the amount of available silver. In this study, we report the biofilm inhibition of a Staphylococcus epidermidis biofilm using a low-temperature processed silver-doped phenyltriethoxysilane sol-gel coating. The incorporation of a silver salt into a sol-gel matrix resulted in an initial high release of silver in de-ionised water and physiological buffered saline (PBS), followed by a lower sustained release for at least 6 days-as determined by graphite furnace-atomic absorption spectroscopy (GF-AAS). The release of silver ions from the sol-gel coating reduced the adhesion and prevented formation of a S. epidermidis biofilm over a 10-day period. The presence of surface silver before and after 24 h immersion in PBS was confirmed by X-ray photoelectron spectroscopy (XPS). These silver-doped coatings also exhibited significant antibacterial activity against planktonic S. epidermidis. A simple test to visualise the antibacterial effect of silver release coatings on neighbouring bacterial cultures is also reported. r

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Surface characterization of silver-doped bioactive glass

Cited by 151 publications

References 28 publications

Antibacterial silver-doped bioactive silica gel production using molten salt method

Antibacterial silver-doped bioactive silica gel production using molten salt method

45S5 Bioglass porous scaffolds: structure, composition and bioactivity characterization

Prevention of Staphylococcus epidermidis biofilm formation using a low-temperature processed silver-doped phenyltriethoxysilane sol–gel coating

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