Gold nanoparticles are used for medical applications rather using elements such as platinum which can be lethal in certain circumstances. Forming gold into nanoparticles allows to use areas that are too small to reach which brings new potential and capabilities. For Gold nanoparticle application, it has some clear advantages– when gold nanoparticles are very small with a diameter of 5 nm or less, they can used as catalyst; for instance transform air pollutants into harmless molecules. Gold nanoparticle can also be used to treat diseased regions of the body such as cancer tumors and other molecules such as therapeutic drug molecules. Another interesting property of gold nanoparticle; it has ability to convert certain wavelengths of light into heat [1].