Preparation and characterization of Ag‐deposited aminosilane‐modified silicate by chemical reduction method

Abstract

Nanocomposites based on silver (Ag) and organically modified silicate (Ormosil) were prepared by an in situ reduction method, in which silver nitrate, tetraethoxysilane and N-[3-(trimethoxysilyl)propyl]diethylenetriamine (ATS) acted as precursor, linker, and colloidal suspension stabilizer, respectively. The objective of the study was to produce silver nanoparticles through AgNO 3 chemical reduction in a continuous media, in which aminosilanes act as superficial modifiers of Ag nanoparticles, inhibiting their growth and preventing aggregation. The physical properties of the Ormosil/Ag composites were examined using NMR, electron spin resonance, scanning electron microscope, transmission electron microscope, and thermal gravimetric analysis spectroscopy, the results of which indicated that Ag was incorporated in the Ormosil matrix after impregnation. The Ag content and surface morphology of the Ormosil/Ag composites depended on the initial concentration of AgNO 3 . The antibacterial effects of the Ormosil/Ag composites were assessed by the zone of inhibition and plate-counting methods, and an excellent antibacterial performance was

Organically Modified Silica Nanoparticles Interaction with Macrophage Cells: Assessment of Cell Viability on the Basis of Physicochemical Properties

“…5 This is because of their biocompatibility, biodegradability, and ease with which these nanoformulations can be synthesized at large scale and chemically modified for varying surface functionalization. 6,7 All these advantages have resulted in utilization of silica as organically modified silica (ORMOSIL) (shell) coating 8 on different metal/metal oxide nanoparticles such as gold, 9 silver, 10 and ferrous (iron) 11,12 for properties such as antibacterial 10 (Gram-negative E. coli and P. aeruginosa, and Gram-positive S. aureus and B. subtilis) and cancer cell targeting along with imaging when labeled with transferrin and quantum dots. 13,14 This suggests that encapsulation of metallic core in polymeric structure not only makes formulation biocompatible, but also resulted in stable multifunctional advanced system.…”

Formation of conductive silver films via inkjet reaction system

“…Because the density of silver is larger than other by-products and silver is non-soluble in water, silver nanoparticles are able to deposit on the glass slides and leave the by-products on top surfaces. 18 Fig . 4(a)).…”

“…Hence, the samples were cleansed in a 0.05 M HNO 3 aqueous solution to remove unwanted by-products. 18 Fig. 5 shows the ATR spectra from the original and cleansed samples.…”

Antibacterial and Regenerated Characteristics of Ag-zeolite for Removing Bioaerosols in Indoor Environment

“…Most of current antibacterial studies have focused on microorganisms in liquid phases such as using the methods of growth inhibition, minimum inhibitory concentrations and zone of inhibition assays to determine the antibacterial properties of materials (Cinar et al, 2009;Park et al, 2009;Mohan et al, 2011;Wu et al, 2011). There is lack of information about investigating air phase bioaerosol removal systems in a continuous-flow environment.…”