Customized physical and structural features of phosphate-based glass-ceramics: role of Ag nanoparticles and Ho³⁺ impurities

Abstract

The effects of silver nanoparticles (Ag NPs) embedment on the physical and structural characteristics of the holmium ions (Ho 3+ ) activated phosphate-based glass-ceramics were assessed. Two series of such glass-ceramics were prepared using the melt-quenching and characterized. In the first series, the Ag NPs were nucleated from the incorporated AgCl via the redox process. In the second series, the pure Ag nanopowder was directly added. The overall properties of these glass-ceramics were strongly sensitive to the cooling procedure and NPs addition strategies, leading to different density and refractive index modifications in the two series. The recorded O1s XPS peaks were exploited to determine the bridging to non-bridging oxygen ratios in the studied glass-ceramics network that enabled to unfold the differences in the observed inferences. A compelling correlation among various attributes in the achieved glass-ceramics was established. Briefly, the overall traits of the proposed glass-ceramics were tailored by regulating the preparation conditions.

Physical and optical traits of tellurite glass: effect of bimetallic TiO2/Au nanoparticles

“…where E opt is the optical band gap of the glass. The molar refractivity (R M ) was assessed by [8] 𝑅…”

“…The density lies in the range of 5.166 -5.200 g.cm -3 . The first incorporation of TiO 2 NPs causes a decrease in the density of glass from 5.200 g.cm -3 to 5.166 g.cm -3 manifests an increasing number of non-bridging oxygen (NBO) in the glass network [8]. The addition of 0.03 mol% Au NPs (TZNETiAu0.03 glass) shows a slight increment in the density from 5.166 g.cm -3 to 5.189 g.cm -3 .…”

“…The addition of 0.03 mol% Au NPs (TZNETiAu0.03 glass) shows a slight increment in the density from 5.166 g.cm -3 to 5.189 g.cm -3 . The increase in the density of glass implies the escalation in the number of bridging oxygen (BO) [8]. Nonetheless, further inclusion of Au NPs causes a slight decrement in the density from 5.188 g.cm -3 to 5.183 g.cm -3 .…”

“…The molar volume is affected by the density and molecular weight of the glass [11]. The first incorporation of TiO 2 NPs causes an expansion in the molar volume from 26.423 cm 3 .mol -1 to 26.549 cm 3 .mol -1 implying the elongation of the bonds within the network [8]. Further, the addition of 0.03 mol% Au NPs (TZNETiAu0.03 glass) shows a slight decrement in the molar volume from 26.549 cm 3 .mol -1 to 26.434 cm 3 .mol -1 manifesting the reduction of the bond's length [8].…”

Design, Characterization, and Antibacterial Performance of MAPLE-Deposited Coatings of Magnesium Phosphate-Containing Silver Nanoparticles in Biocompatible Concentrations

“…Loading of AgNPs into the calcium or magnesium ceramics porous structure has been proposed to obtain biomaterials or implant coatings with high biocompatibility and antibacterial properties [ 35 , 36 ].…”