Nobel Metallic Nanoparticles with Novel Biomedical Properties

Silver nanoparticles and its typesSilver colloids: In silver nanoparticles if the product is clear then it is ionic silver, not a true silver colloid.Meso silver is called as purest colloidal silver and silver nanoparticles come to the market in 5 types according to its purpose.Nano xact: Spherical silver formulations are precisely manufactured unaggregated spherical nanoparticles suspended in water.Biopure silver: It is a high concentration formulation that has been extensively purified to remove residual reactants. OECD-silver:This silver was given a Organization for Economic Cooperation and Development guidance.Its formulation has been selected as nanotoxicology standards with PVP and citrate surfaces.Custom silver: This can be produced with custom concentrations, charge, biofunctionalization shells and suspension media.Silver nanoparticles: They have high optical efficiencies and can be tuned to interact with wavelength ranging from 550nm to 950nm.[www.nanocomposix.com](Figure 1). Gold nanoparticles and its typesThere are many subtypes of gold nanoparticles based on the size, shape and physical properties.Gold nanospheres: Gold nanospheres although not exactly spherical in a strict sense [also known as gold colloids]of 2 nm to over 100nm in diameter can be synthesized by controlled reduction of an aqueous Haucl4 solution using different reducing agents under varying conditions.Most commonly citrate is used as a reducing agent, which can produce nearly monodisperse gold nanospheres [5].SERS [Surface-enhanced Raman scattering] is an optical technique that offers many advantages over traditional