Amorphous iron nanoparticles were self-assembled coated with octadecyltrichlorosilane and with sodium dodecyl sulfate. Characterization of the coatings was accomplished by Fourier transform infrared spectroscopy, elemental analysis, and floatability measurements. Under the experimental conditions : used, the coatings prepared with sodium dodecyl sulfate were superior to coatings prepared with octadecyltrichlorosilane.