Variable blocking temperature of a porous silicon/Fe3O4 composite due to different interactions of the magnetic nanoparticles

摘要: In the frame of this work, aim was to create a superparamagnetic nanocomposite system with maximized magnetic moment when magnetized by an external field and blocking temperature far below room temperature. For purpose, iron oxide nanoparticles 3.8-, 5- 8-nm size have been infiltrated into pores porous silicon. To fabricate tailored properties system, particle interactions among particles play crucial role. Different concentrations dispersed in hexane used for infiltration vary TB, which indicates transition between behavior blocked state. TB is not only dependent on but also them, can be varied particle-particle distance. Thus, modification pore loading one hand silicon morphology other results composite material desired Because both materials, mesoporous matrices as well Fe3O4 nanoparticles, offer low toxicity, promising candidate biomedical applications.