Biosintesis Nanopartikel Perak Menggunakan Ekstrak Daun Sambiloto: Optimasi Proses dan Karakterisasi

BIOSYNTHESIS OF SILVER NANOPARTICLES USING SAMBILOTO LEAF EXTRACT: OPTIMIZATION PROCESS AND CHARACTERIZATION. It has been synthesized silver nanoparticles(AgNP) with biological method or biosynthesis, successfully. The synthesis is done using extract of Sambiloto leaf (Andrographis paniculata Ness). The study involved determining the optimum volume ratio of synthesis i.e. AgNO3 solution:extract solution and characterization of nanoparticles formed. The concentration of AgNO3 solution used was 1Mand extract solutionwas 7.5 g/L. The characterization included UV-Vis spectrophotometer, EDS, TEM, XRD and FT-IR spectrophotometer. The results obtained were, the optimum volume ratio of synthesis was 10 μL:10 mL. The characteristics ofAgNP formed were the Surface Plasmon Resonance (SPR) absorbance at a wavelength of 423 nm. The diffraction peaks observed at angles 2 of 38.180, 45.810 and 64.870 which corresponded to the hkl (1 1 1), (2 0 0) and (2 2 0). These results showed that the crystal structure of AgNP formed was face center cubic (FCC) with lattice parameter a, of 4.03 Å. TEM characterization showed that the size of AgNP nanoparticles was about 10-30 nm