Titik Taufikurohmah, I. Gusti Made Sanjaya, Afaf Baktir, Achmad Syahrani
Colloidal Platinum nanoparticles have been synthesized with glycerin as matrix and present of silver ions. Thermal oxidation-reduction process used in this synthesis with 10 minutes controlling time at 100oC. Volume of Glycerin controlled 3 ml in 100 ml of solution. Ag present on the surface of platinum clusters. In this research, clusters form and clusters diameter have correlated with the concentrate of silver ions, than as independent variable. These concentrate of silver ions are dependent with clusters form and clusters diameter, than used independent variable in this research. Concentrate of silver ions are 0.3, 0.4, 0.5, 0.6, 0.7, and 0.8 M. Characterization of colloidal platinum nanoparticles used UV-Visible spectrophotometer. The λ maximum absorption of platinum nanoparticles is in the range 200-216 nm. The move of the cluster size can see by the change of the λ maximum absorption at periodical measure. This phenomena show the stability of the colloidal platinum. The form of cluster nanoparticle observed in Transmission Electron Microscopy (TEM) figure. Future prospects of platinum nanoparticle as healthy drink, that is important to study the stability this colloidal. The constant of λ maximum absorption and absorbance inform of the colloidal stability. The conclusion that Ag present have not correlation with stability of colloidal, but correlation with the octahedral form of the cluster.
Chemistry Department Surabaya State University, Jl. Ketintang, Surabaya, 60231, Indonesia; Chemistry Department Airlangga University, Jl. Sutorejo, Surabaya, Indonesia; Pharmacy Department, Airlangga University, Jl. Dharmawangsa Dalam, Surabaya, Indonesia
