Raman Spectroscopy of Surface Modified Magnetic Nanoparticles Based on Ferrites

摘要

The advances in science at the end of XX~th century point in the direction of development of nano-technologies. i.e. materials formed by nanoparticles. Chemically synthesised ferrofluids, or magnetic fluids, formed by the dispersion of nanosized ferrite (M(II)Fe_3O_4, M=Fe,Zn,Co,Cu,Mn, etc.)particles into an papropriate solvent are certainly such kind of material~(1). This kind of sols present high surface areas and the modification of this surface by a suitable adsorbate can generate magnetic fluids with diferent proerties, some of them of biomedical interest. known as biocompatible magnetic fluids~(2).