Unique properties of silver and copper silica-based nanocomposites as antimicrobial agents

Peszke, J.; Dulski, Mateusz; Nowak, A.; Balin, Katarzyna; Zubko, Maciej; Sułowicz, Sławomir; Nowak, B.; Piotrowska‐Seget, Zofia; Talik, E.; Wojtyniak, Marcin; Mrozek-Wilczkiewicz, Anna; Malarz, Katarzyna; Szade, J.

doi:10.1039/c7ra00720e

Cited by 42 publications

(47 citation statements)

References 70 publications

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Section: Microstructure and Structural Investigations Of The Depositementioning

confidence: 98%

“…According to the literature, the region (1) is connected to the deformational modes of O-P-O within (PO 4 ) 3− tetrahedrons. However, the shape and intensity of the fitted line in this region might only be explained by the impact of silica with the stretching and deformation vibration of Si-O-Si and O-Si-O [49]. As a result, the superposition of bands that are attributed to the modes of O-P-O from HAp, Si-O-Si, and O-Si-O of silica enables that reproduction of the real shape observed during the experiment, but makes it impossible to provide a more precise interpretation of the silica component's nature.…”

Section: Microstructure and Structural Investigations Of The Depositementioning

confidence: 98%

“…The coatings were deposited using the EPD technique from a colloidal suspension having a concentration of 0.1 wt.% HAp powder (Sigma Aldrich, Saint Louis, MI, USA) and nSiO 2 /Ag nanocomposite powder in 96% ethanol (Avantor Performance Materials, Gliwice, Poland). The silver-silica nanosystem was prepared according to the procedure that was described by Peszke et al [49]. The mixtures of 10:1, 5:1, and 1:1 ratio of HAp and nanocomposite were used to prepare a colloidal suspension.…”

Section: Suspension Preparation and Formation Of Coatingsmentioning

confidence: 99%

“…The band arrangement of the region (2), similarly to the previous one, is the superposition of the overlapping signal from the vibrations of the entire molecular fragments in Ca(PO4) i.e. characteristic for O-Ca-O, O-P-O lattice modes of translational or liberational character, as well as modes that are linked to Ag-O[49]. The low-intensity band that is located at 3573 cm −1 is characteristic of vibrations related to hydroxyl groups (-OH − )[51][52][53][54][55][56].…”

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confidence: 93%

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Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

2020

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The surface modification of NiTi shape memory alloys is a method for increasing their multi-functionalities. In our solution, hydroxyapatite powder was mixed with a chemically synthesized silicon dioxide/silver (nSiO2/Ag) nanocomposite in a different weight ratio between components (1:1, 5:1, and 10:1) and then electrophoretically deposited on the surface of the NiTi alloy, under various time and voltage conditions. Subsequently, uniform layers were subjected to heat treatment at 700 °C for 2 h in an argon atmosphere to improve the strength of their adhesion to the NiTi substrate. A change in linear dimensions of the co-deposited materials during the sintering process was also analyzed. After the heat treatment, XRD, Raman, and Scanning Electron Microscopy (SEM) + Energy Dispersive Spectrometer (EDS) studies revealed the formation of completely new composite coatings, which consisted of rutile and TiO2-SiO2 glass with silver oxide and HAp particles that were embedded into such coatings. It was found that spalling characterized the 1:1 ratio coating, while the others were crack-free, well-adhered, and capable of deformation to 3.5%. Coatings with a higher concentration of nanocomposite were rougher. Electrochemical impedance spectroscopy (EIS) tests in Ringer’s solution revealed the capacitive behavior of the material with high corrosion resistance. The kinetics and susceptibility to pitting corrosion was the highest for the NiTi electrode that was coated with a 5:1 ratio HAp/nSiO2/Ag hybrid coating.

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Section: Microstructure and Structural Investigations Of The Depositementioning

confidence: 98%

Section: Microstructure and Structural Investigations Of The Depositementioning

confidence: 98%

Section: Suspension Preparation and Formation Of Coatingsmentioning

confidence: 99%

mentioning

confidence: 93%

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Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

2020

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“…Silica‐based materials have been preferred for antimicrobial applications due to their hydrophilic nature and biocompatibility . Among them, MCM‐41‐type mesoporous silica materials have gained great interest over recent years, mainly due to their unique features, such as, uniform porous structure, large surface area, and excellent chemical and thermal stability .…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Biosynthesized Nanosilver in Silica Composites for Sustainable Antimicrobial Functionality

et al. 2018

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Silver nanoparticles (AgNPs) have become known as a broad‐spectrum antimicrobial agent. The antimicrobial activity of AgNPs is dependent on the particle size and the dispersion status. In this study, a simple and effective approach is developed for sequestering the biosynthesized AgNPs in silica composites during the gel formation of MCM‐41. Composites with different Ag concentrations of 0.034% (Ag1@MCM‐41), 0.151% (Ag2@MCM‐41), and 0.369% (Ag3@MCM‐41) are synthesized and then heated at 400 °C to produce Ag1@MCM‐41H, Ag2@MCM‐41H, and Ag3@MCM‐41H, respectively. The samples are characterized by flame atomic absorption spectrometry, Fourier‐transform infrared spectroscopy, X‐ray diffraction, N2 physisorption, scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis. The AgNPs are confirmed to be highly dispersed in the amorphous silica framework. The antimicrobial activity of the AgNP–silica samples is investigated against Staphylococcus aureus, Escherichia coli, and Candida albicans using the cup–plate and the plate‐count techniques. The results show an excellent antimicrobial effect of these samples against the studied microorganisms. Importantly, the AgNP–silica samples are found to be stable up to 58 months under ambient conditions. These stable and powerful antimicrobial composites provide a more practical and effective strategy for combating biomedical pathogens and public health threats.

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Perspectives of Novel Drug Delivery in Mycoses

Maheswary¹,

Leela²,

Ravi³

2023

Advances in Novel Formulations for Drug Delivery

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Unique properties of silver and copper silica-based nanocomposites as antimicrobial agents

Abstract: The paper reports a new route for the fabrication and determination of physicochemical properties and biological activity, of metallic silica-based nanostructure (Ag/SiO2, Cu/SiO2).

Cited by 42 publications

References 70 publications

Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

Encapsulation of Biosynthesized Nanosilver in Silica Composites for Sustainable Antimicrobial Functionality

Perspectives of Novel Drug Delivery in Mycoses

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