Dong-Won Lee Ji-Hun Yu Taesuk Jang Byoung-Kee Kim
材料科学技术（英文）
In order to prevent the oxide formation on the surface of nano-size iron particles and thereby to improve the oxidation resistance in ordinary condition, iron nanoparticles synthesized by a chemical vapor condensation method were directly soaked in hexadecanethiol solution to coat them with a polymer layer. Oxygen content in the polymer-coated iron nanoparticles was significantly lower than that in usual air-passivated particles possessing iron-core/oxide-shell structure. Accordingly, oxidation resistance of the polymer-coated particles at an elevated temperature below 130°C in air was 10-40 times higher than that of the normally passivated particles.
关键词:
Powder technology
,
Nano materials
,
Iron
,
Chemical vapor condensation
Ji-Hun Yu Jai-Sung Lee Yong-Ho Choa Heinrich Hofmann
材料科学技术（英文）
SiO2 coated α-Fe2O3 nanocomposite powder has been successfully synthesized by chemical vapor condensation process and its feasibility on hyperthermic application was investigated in this study. The power loss of SiO2 coated α-Fe2O3 nanocomposite powder which means the magnetic heating effect under alternative magnetic field was much higher than the single phase α-Fe2O3 nano powder due to the very fine size under 20 nm and well dispersion in biologically compatible SiO2 matrix. The superparamagnetism and hyperthermic property of SiO2 coated α-Fe2O3 nanocomposite powder were discussed in terms of microstructural development in this study.
关键词:
Hyperthermia
,
Chemical vapor condensation
,
Silica coated iron oxide nanoparticle
,
Superparamagnetism
