Synthesis of Iron Nanoparticles Capped by Citric Acid or Citrates and its Characterizations

We report the synthesis of iron nanoparticles (FeNP) using the chemical reduction method with citric acid and trisodium citrate as reduction agents and capping material. The FeNP was obtained in a homogenous yellow transparent solution. The result obtained from using the reduction agent of citric acid and trisodium citrate yield an average spherical size of 100.7 nm and 97.4 nm, respectively. We observed a broad peak in UV-vis spectra of FeNP in the range of 273 nm to 279 nm. This peak is associated with a fluorescence excitation of iron nanoparticles as well as their aggregates.