DNA-magnetite nanocomposite materials

摘要

It is shown here that magnetite nanoparticles can be associated with double-stranded DAN. In a first step, a complex of DNA with Fe~2+ and Fe~3+ ions is formed. ＋Then, in a second step, magnetite nanoparticles are formed by increasing the pH. As shown by electrophoresis, the nanoparticles are strongly attached to the nucleic acid. From TEM imaging and Mossbauer measurement, a tentiative model for the textural organization of DNA and magnetite is proposed.