Shape and stability of silver nanoparticles and their dependence on the conditions of preparation.

Abstract

By using the citrate reduction procedure we have synthesized Ag nanoparticles, applying several conditions of preparation, being after characterized by UV-visible spectrophotometry. Following a logical sequence, the starting experiment was realized varying the reaction time, after that it was varied the concentration of the reductor agent, and finally it was varied the volume of the reductor agent. According to this methodology, TEM measurements show that firstly we have nanostructures with different shape and size, whereas in the last part of the experiment we have Ag nanoparticles with homogeneous shape and size.

Antimicrobial dependence of silver nanoparticles on surface plasmon resonance bands against <em>Escherichia coli</em>

“…The dynamic phase separation of PEG may lead to the metal complexation and partition due to chemical participation of solvated anion from the polyethylene oxide chains 6,17,44. In addition, at a temperature between 80°C and 100°C, NaOH reacts with PEG and precipitate 5,45,46…”

“…In the field, the application of metallic nanoparticles (NPs) in the technological sector has gained special attention in many areas such as photonic, biosensing, nanosensors, catalytic, cell electrodes, optics, and antimicrobial activities1–3 owing to their unique optical, physical, and chemical properties 4,5. Recently, comprehensive studies have been conducted to characterize many nanometals for industrial applications.…”

“…However, these applications are based on properties that are defined by their shape, size, configuration, and crystal orientations 13,14. AgNPs have a high surface-to-volume ratio15 with unique properties for novel applications, on the basis of which many strategies have been developed to control the shapes, sizes, and orientations of AgNPs for particular industrial applications 5,16…”