Nano particles have gained special attention in recent years due to their remarkable electrical, magnetic, optical, and mechanical capabilities, and they offer a variety of uses in all sectors of engineering. Gold nanoparticles, for instance, are catalytic when they are 10 nm in size, whereas nanoparticles with a short radius of curvature and angular forms have better catalytic capabilities. Co-precipitation nanoparticle production is a simple approach that results in a wide range of nanoparticle sizes. Top-down and bottom-up techniques used to create mono-dispersed spherical bismuth (Bi) NPs. These Nanoparticles have outstanding colloidal characteristics. Sputtering is the technique for creating NPs that involves hitting solid surfaces with the high energy particles like gas or plasma. In an aqueous solution, gold nanoparticles were created by using a laser ablation approach. A zeta potentiometer is often used to assess surface charges and their dispersal constancy in a solution. Several industry and technology sectors, including IT, medicine, energy, transportation, homeland security, food safety, and environmental research, are being significantly improved, if not revolutionized, by nano-technology.