High Antibacterial and Antifungal Activity of Silver Monodispersed Nanoparticles Embedded in a Glassy Matrix

Abstract

Silver doped glass powders have been obtained starting from vitellinate/nAg and montmorillonite/nAg. These powders have shown a high biocide activity against the three different types of microorganisms studied: Escherichia coli (gram‐negative bacteria), Micrococcus luteus (gram‐positive‐bacteria), and Issatchenkia orientalis (yeast). It was found that these glasses keep constant the silver concentration even below the cytotoxic limit. Therefore we interpret that silver doped glasses play the role of dosing devices.

Nanocomposites of silver nanoparticles embedded in glass nanofibres obtained by laser spinning

“…3C. The size of the silver nanoparticles observed in the nanobres is very similar to that reported in the precursor glass matrix (5-50 nm), 22 denoting the absence of agglomeration during the laser spinning process. This may be due to the fact that the process of nanobre formation is very fastof the order of millisecondsthus preventing metal diffusion through the viscous molten silicate.…”

Novel Durable Antimicrobial Ceramic with Embedded Copper Sub-Microparticles for a Steady-State Release of Copper Ions

“…The solution to this problem is the reduction of the mobile ions to immobile sub-microparticles that are embedded into the porous structure of the ceramic and strongly adhere to mineral surfaces. Conversion of cations embedded in the structure of minerals to metallic sub-micro and nanoparticles is a relatively new approach [ 30 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ], although this concept originates from research on modification of synthetic zeolites [ 51 , 52 , 53 , 54 ]. Hydrogen is most commonly used to reduce cations to their elemental forms through the reaction: where M is the metal.…”

Evaluation in a Dog Model of Three Antimicrobial Glassy Coatings: Prevention of Bone Loss around Implants and Microbial Assessments

“…In previous studies [ 18 , 20 , 26 ] the antimicrobial capability of different antimicrobial glasses was proven against various microorganisms. Three of those glasses were selected as precursors of the bactericidal coatings: i) a soda-lime window-like glass with silver nanoparticles labeled as G1-nAg [ 26 ], ii) a soda-lime glass from the SiO 2 -Na 2 O-Al 2 O 3 -CaO-B 2 O 3 system labeled as G3 [ 18 ], and iii)a glass belonging to the B 2 O 3 -SiO 2 -Na 2 O-ZnO system labeled as ZnO35 [ 20 ].…”

“…Chemical composition of these glasses is shown in S1 Table . On the other hand, homogeneous dispersed silver nanoparticles (10–90 nm) embedded into glassy matrix with a content of silver of 20 wt.% was prepared according to the method developed by Esteban-Tejeda et al [ 26 ].…”