Is silver nanoparticle is worthful to humankind?
Yes sure, Silver Nanoparticles are good antimicrobial agent. It can be exploited for this property. Various antiseptic lotions, cosmetics and bandages are nowadays have silver NPs coating. Not only now in ancient times also it has been used for its antimicrobial property. Various utensils were coated with these silver nanoparticles to avoid food contamination etc. so sure it is worthy for humankind.