The green synthesis of gold nanoparticles was investigated using different metal ion concentration at a fixed inoculum dose and reaction incubation time. It was observed that the size of the nanoparticles and anisotropic nature of the particles increased. What is the exact reason behind this interesting phenomenon?
Dear
Agree with Patil
As Size of NPs is totally depends on concentration of reducing agent, here in your study, Plant extract responsible for reduction process. So, when you add increase metal ion conc. that time secondary reduction may take place and particles aggregate which is responsible for size and shape for NPs synthesis.
Hello,
Size and anisotropic nature of NPs is totally depends on concentration of reducing agent, here in your study, Plant extract responsible for reduction process. So, when you add increase metal ion conc. that time secondary reduction may take place which is responsible for size and shape for NPs synthesis.
Higher concentration of plant extract can completely reduce metal ions into NPs and there will ne no more chancess for secondary reduction and formation of bigger NPs.
Hope so you may understand.
Follow linked article to understand mechanism behind NPs synthesis and many more.
Good luck.
Article Eco-friendly approach for nanoparticles synthesis and mechan...
Article Eco-friendly Synthesis of Gold Nanoparticles and Evaluation ...
Plant extract acts as a reducing agent and stabilizer nanoparticles. The size and the anisotropy of the nanoparticles is determined thermodynamics and kinetics of the formation of a new phase (see file). The influence of the extract on these processes, adsorption onto nanoparticles extract substances...
Respected Yuri Mirgorod Sir,
Thank you so much for providing such a valuable source against my problem.
Thanks a lot sir.
Dear
Agree with Patil
As Size of NPs is totally depends on concentration of reducing agent, here in your study, Plant extract responsible for reduction process. So, when you add increase metal ion conc. that time secondary reduction may take place and particles aggregate which is responsible for size and shape for NPs synthesis.
Dear Kumar,
Size of NPs depends on the Metal ion and ligand ratio, increasing the concentration of ligand (capping agent) will restrict the size of NPs. Reducing agent also plays an important role. Following is review which explains in details all the factors, although its not related to anisotropic growth, still a decent publication for understanding the concept.
http://pubs.acs.org/doi/full/10.1021/acsnano.5b01579
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