The quest for energy efficient, cost-effective and eco-friendly synthetic routes for metal NPs with highly specified properties and biocompatibility is an extremely important and challenging job. Over the past few years, a plethora of medicinal plants have been put to trial as the source of multifunctional green chemical agents which might be able to facilitate such synthetic processes. In this review, we have attempted to acquaint the reader with the tremendous flurry of activities going on in the field of biogenic synthesis of metal NPs, and also to highlight its immense growth potential.
There is a demand for the development of reliable, cost-effective,
and environment friendly protocols for the synthesis of metal NPs
with finely tuned structures for technological applications. In the
present work, we have exploited the antioxidant activity of the aqueous
extract of dried and pulverized leaves of Murraya koenigii Spreng. as a green multifunctional agent in the synthesis of Au
NPs with finely tuned morphologies, and our method is a promising
green tool for the synthesis of Au NPs with tailor-made structural
properties. Moreover, the uniqueness of the present biogenic synthetic
route is that simple experimental parameters like control of the concentration
of the multifunctional agent and precursor metal ion and also pH and
temperature can be effective in the synthesis of Au NPs with finely
tuned structures. We have also proposed a plausible mechanistic pathway
for our green synthetic route, which may aid in fine-tuning green
chemical methods for the controlled synthesis of various metal NPs.
At the same time, our study on the interaction between Au NPs and
surface-adsorbed fluorescent groups may also be helpful for physicochemical
investigations on energy transfer and near-field optical enhancement.
Thus, this type of study may be explored in the future for fabricating
novel photonic devices.
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