Synthesis and Characterization of Antibacterial Ag−SiO₂ Nanocomposite

Abstract

In order to increase antibacterial abilities and avoid aggregation of Ag nanoparticles, Ag−SiO2 nanocomposites were studied to achieve hybrid structure. SiO2 nanoparticles synthesized by the Stöber method served as seeds for immobilization of Ag. The chemical binding structure and morphology of Ag−SiO2 nanocomposites and SiO2 nanoparticles were investigated with X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The antibacterial properties of Ag−SiO2 nanocomposites were examined with disk diffusion assay and minimum inhibitory concentration (MIC). Results showed that Ag nanoparticles are homogeneously formed on the surface of SiO2 nanoparticles without aggregation and showed excellent antibacterial abilities.

Antibacterial activity, cytotoxicity and mechanical behavior of nano-enhanced denture base resin with different kinds of inorganic antibacterial agents

“…To solve this problem, a wide range of materials have been employed to support Ag NPs to be homogeneously formed without aggregation 32) . Silverloaded zeolite and zirconium phosphate are recently emerging as various commercial products 33) .…”

Synthesis, Characterization, and Applications of Dendrimer-Encapsulated Zero-Valent Ni Nanoparticles as Antimicrobial Agents

“…When the concentrations of the nanoparticles are increased to 200 L, Figure 6(b), wider zones of inhibition are observed. That is, the antimicrobial activity improved with increasing amount of dendrimer-encapsulated Ni(0) nanoparticles and thus they are good inhibitors of E. coli growth [13].…”

“…As of date, nanosized inorganic particles with simple or complex structures are currently being used in electronics [1], optical devices [2,3], sensor devices [4,5], surface enhanced Raman scattering (SERS) [6,7], catalysis [8][9][10], biomedicine [11], wound healing [12], antimicrobial properties [13,14], gene expression [15], and magnetic resonance imaging [16]. However, due to the limitation of current synthesizing methodologies to produce nanoparticles with precise physical and chemical details, concerns have increased over nanoparticle usage in the healthcare industry.…”

“…However, due to the limitation of current synthesizing methodologies to produce nanoparticles with precise physical and chemical details, concerns have increased over nanoparticle usage in the healthcare industry. Furthermore, with increasing microbial organisms' resistant to various antibiotics and uncertainties in healthcare costs, the emergence of more cost effective new methodologies to produce nanosized particles with specific physical and chemical functionalities and with limited or no resistance has piqued the interest of scientists around the globe [11][12][13][14][15]. That is, the development of more cost efficient synthetic methodologies with the capability of producing nanoparticles with highly controllable sizes and chemical functionalities will increase the possibilities of developing new types of nanostructures with well-designed (or even specific) functional surfaces or architectures that can be used in the biomedical industry as antimicrobial agents.…”

Core-shell SiO2/Ag composite spheres: synthesis, characterization and photocatalytic properties

“…The strong dipole-dipole interactions between neighboring nanoparticles and Mie scattering of silver shell would promote red shift and broadening of the plasmon bands for silver clusters attached on silica spheres. of the silica spheres (zeta potential ∼ −2.3 mV) via chemisorption and electrostatic attraction [12,24,25]. After that, when additional NaBH 4 is dropped into, the reduction process would be initiated.…”