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Synthesis and characterization of crystalline iron nanoparticles from zerovalent iron sandwich complexes

Nguyen, Anh Tue. M.S., Purdue University, August 2014. Synthesis and Characterization of Crystalline Iron Nanoparticles from Zerovalent Iron Sandwich Complexes. Major Professor: Alexander Wei. In this project we present a systematic study on the synthesis of crystalline iron nanocubes by thermal decomposition of an iron sandwich complex, (π-C5H5)Fe(π-C6H7), in the presence of oleylamine and oleylamine.HCl as surfactants and n-decane as a solvent. The presence of oleylamine.HCl is essential for the reproducible formation of crystalline iron cores. Reaction parameters such as temperature, surfactant concentration, effect of counterion, and organoiron reagent structure were investigated in order to obtain iron nanoparticles with uniform size and shape. The nanoparticles, which were characterized by TEM, HRTEM, SAED, and XRD, were determined to have core/shell structures, with the former composed of bcc-Fe and the latter composed of iron oxide (Fe3O4 or Fe2O3).