Assembling of Magnetic Iron Oxide Nanoparticles Controlled by Self- Assembled Monolayers of Functional Coordinating or Chelating Trialkoxysilanes

Magnetic nanoparticles (NPs) have been assembled in films by using self-assembled monolayers (SAMs) of organic molecules. SAMs were prepared by the reaction of organotrialkoxysilanes with surface silanol groups of silicon wafers. SAMs were prepared and their surface was decorated either by amine or thymine groups which have the ability to immobilize iron oxide nanoparticles as monolayers. These groups have different coordinating and chelating abilities and influence the kinetic of the assembling reaction. Finally, the magnetic properties of the assemblies of NPs were studied.