**5. Conclusion**

Plant-based synthesis and stabilization of metal/metal oxide NPs have been successfully implemented by many researchers worldwide. These techniques have various advantages including being more affordable physically and financially, having better drug distribution, and having easier production. The major drawbacks of this method include the use of imprecise evaluation tools for the stability, aggregation behavior, size, shape of the NPs, and the subsequent systematic description of the application of the NPs as a result of their physical and chemical characteristics.

Based on these articles, using plant gums alone is less effective than being loaded with NPs substances and on some occasions, they even may have side effects on human body. For an instant, guar gum can lead to infection because of its high moisture if it's not loaded with NPs.

Various metallic or non-metallic NPs can be created and added to these plant gums. Most frequent of them in these studies are AgNPs and AuNPs. Gold nanoparticles (AuNPs) have exceptional stability against oxidation, and therefore, may play a significant role in the advancement of clinically useful diagnostic and therapeutic Nanomedicines. That being said, conventional process for synthesis of these metallic nanoparticles utilizes toxic reagents as reducing agents, additional capping agents for stability as well as surface functionalization for drug delivery purposes. Also, according to various studies, they are less effective against microorganisms than AgNPs. AgNPs have a strong bactericidal and catalytic effect according to various studies. They are extremely beneficial for preventing drug-resistant bacteria which will be a huge issue in the future.

The influence of different parameters such as gum particle size, concentration of gum, concentration of silver nitrate, and reaction time on the synthesis of nanoparticles is quite significant in various studies. For instants, smaller NPs can have more bactericidal effects compared to their bigger counterparts. Thus, using the right concentration and technique for making these NPs are very important and should be considered.

The future use of tree gums also relies on the development of ultralightweight, high, strength, bio-based, biodegradable, porous, and tunable, two-dimensional (2D) membranes, and three-dimensional (3D) sponges with facile and easy to implement synthetic schemes. Each year scientists are getting more keen on researching about these green NPs because of various reasons including the significant growth in the number of antibiotic-resistant bacteria or climate change. Also, these NPs can be afforded and produced easily.
