Synthesis And Characteristics Of Magnetic Ferroferric Oxide Nanocomposites

Magnetic nanomaterials is getting widespread concerned as an emerging material,and the excellent performance of it can not be replaced by any other materials, inmany fields, just like memory material, micro-magnetic drive control, targeted drugdelivery, magnetic fluid hyperthermia, separation and detection, water pollutioncontrol. It has a rapid development. In recent years, many outstanding researchreported by home and abroad, designing and developing special magneticnanostructures is still a top research in the materials science now. With in-depth studyand progressive of materials science, the requirements standards of the materials’function is increasing, tend to making one kind of material has a variety of functions,as to nano-magnetic materials, composite research for complex nature materials isfocused on. Preparating new nano-composite material which has characters such asmagnetic-load characteristic, magneto-optical properties, magnetic-electriccharacteristics, will have broad application prospects in medical, military,environmental and many other fields.Iron oxide nanoparticles is a common magnetic materials, the methods topreparate it have the characters of varied, simple operation, and low cost. Superpara-magnetic and surface-modified Fe3O4nanoparticles were synthesized by high-temperature hydrolysis method. With the Fe3O4nanoparticle as seed silica stick growson one side of nanoparticle by a ‘non-classic controlled nucleation and growth’method, and Janus-magnetic-mesoporous nanoparticles were achieved. The length ofsilica nanostick in Janus nanoparticle can be controlled by the amount of added TEOS.But the length of silica nanostick in process of primary growth is limited, a secondarygrowth is important to increase the length of silica nanostick. Due to the mesoporouscharacteristic of silica nanostick a loading and releasing experiment was conducted,and a sustained-releasing process of doxorubicin was verified.The application of micro-nano manufacturing technology involves drug release, micro/nano assembly, micro-electromechanical systems(MEMS) and many otheremerging field. In this paper, a series of structural rules prepared magnetic PEGDAhydrogel particles is made successfully with an innovative combination of UVlithography techniques, PDMS soft stamp preparation techniques and micro-nanoimprint technology, This method is simple, fast. It can preparate a plurality of microstructure of particles at one-time. This method gives innovative ideas in micro-nanomanufacturing process that preparation of different particle morphologies may varydepending on the design of the template. In the final of this paper there is a test onmagnetic response properties of the synthesis magnetic particles, and prove that it hasgood magnetic properties.