Zinc-Salt-Mediated Synthesis, Growth Kinetic, and Shaped Evolution of Silver Nanoparticles

Abstract

We report the synthesis of various shaped silver nanoparticles mediated by ZnCl 2 salt. It has been demonstrated that the salt, PVP/AgNO 3 mole ratio, and the type of polyol (EG, DEG,and GL) significantly determined twinning probability, which is an index of silver seed growth origin. High twining probability arising from low PVP/Ag + ratio and 50 mole% salt favours 1D grown nanowires and nanorods, whereas low twining amidst high mole% salt (150) in DEG offered 2D grown nanoflakes and nanosheets. Other shaped silver nanoparticles have been found. Accidentally, we arrived at a core-shell heterostructure of Ag-ZnO nanocomposite with Ag core enrichment when mole% of the salt was made up to 300. Growth kinetic of nanosphere obtained was monitored, and effect of salt mediation was found crucial. Structural evolution of shaped Ag nanoparticles and nanocomposites have been monitored using XRD, SEM, EDX, TEM, and UV/vis.

Green synthesis and growth kinetics of nanosilver under bio-diversified plant extracts influence

“…4c, d. These time-dependent features leading to nanoparticles of varying sizes are characteristic of isotopic growth of spherical morphologies [36]. Scenario displayed for Am system are similarly reflected in other Og, Cc and Va bioreduction processes leading to combination of quazi and twinned morphologies (Fig.…”

Synthesis of silver nanoparticles using extract of Ocimum kilimandscharicum and its antimicrobial activity against plant pathogens

“…The silver nanoparticles synthesized using O. kilimandscharicum showed bright reddish brown colour reflecting the reduction of Ag + into Ag 0 . The characteristic reddish brown colour of colloidal silver solution is attributed to collective oscillation of free conduction electrons induced by an interacting electromagnetic field [40]. The colour density also depends on the size of the synthesized silver nanoparticles.…”

Plant-mediated biosynthesis of silver nanoparticles by leaf extracts of Lasienthra africanum and a study of the influence of kinetic parameters

“…Colloidal solutions of AgNPs show bright colours, which is attributed to collective oscillation of free conduction electrons induced by an electromagnetic field. The synthesized AgNPs were reddish brown in aqueous solution due to excitation of electrons and changes in electronic energy levels, reflecting the reduction of Ag + into Ag 0 [25]. Morphology of the nanoparticles is greatly influenced by the SPR, since it is the basis for measuring adsorption of materials unto the surface of the metal nanoparticles [26,27].…”