Now-a-days, transition metal nanoparticles especially zinc nanoparticles are extensively studied by researchers all over the globe. Among various zinc based nanoparticles, the zinc sulfide nanoparticles (ZnSNPs) have received immense attention and offer significant advances in the biomedical field due to their fundamental properties and indispensable benefits. Although, there are few reports which spotlight recent advances and progress regarding ZnSNPs, unfortunately, there is no systematic comprehensive review article that describes various biomedical applications of ZnSNPs. To this context, the present review article elucidates the recent advancement of ZnSNPs and their future theranostics applications (cancer therapy, antimicrobial activity, angiogenic therapy, biosensing and bioimaging) in the biomedical field. The present review article also gives an overview about possible challenges and future perspectives of ZnSNPs in the area of biomedical science.

Nanoparticles possess enhanced stability and durability compared to macromolecules. Along with various applications they have shown great promise in targeted drug delivery systems. But the various chemical synthesis methods lead to the presence of some toxic chemical species that may have adverse effects in medical applications. On the other hand, synthesis of nanoparticles using plant extracts, also known as green synthesis, offers several advantages over traditional chemical synthesis methods. In this study we choose Parthenium hysterophorus which is a noxious weed that poses numerous risks and hostile properties to humans, animals, and the environment. One of the best practices of its management is the synthesis of nanoparticles from Parthenium weed, particularly Parthenium hysterophorus which has been explored in recent studies. Here's an outline of typical approach for synthesizing various nanoparticles from Parthenium.