| 학회 |
한국재료학회 |
| 학술대회 |
2013년 가을 (11/06 ~ 11/08, 제주롯데호텔) |
| 권호 |
19권 2호 |
| 발표분야 |
B. 나노 재료(Nano Materials) |
| 제목 |
Preparation and Characterization of Carbon-Encapsulated Iron Nanoparticles |
| 초록 |
Spherical iron oxide and carbon-encapsulated iron nanoparticles have been prepared by ultrasonic irradiation followed by annealing at various temperatures. As the annealing temperature of the as-prepared α-Fe2O3 nanoparticles was increased, the sample transformed into γ-Fe2O3, Fe3O4, and Fe nanoparticles via the reduction process without requiring any additional reducing agents such as H2 gas, thus creating a carbon shell surrounding the nanoparticles. By controlling the experimental conditions, Fe nanoparticles of various sizes can be formed with diameters in the range 100 - 800 nm; these nanoparticles are tightly encapsulated by 20 nm thick carbon shells. Because of their high saturation magnetization 212 emu·g-1, the carbon-encapsulated Fe nanoparticles can be used for magnetic resonance imaging (MRI) with a dramatically enhanced efficiency compared to commercially available T2 contrast agents. |
| 저자 |
Ja Young Park, Seung Jae Lee, Jongjin Jung, Hye Mi Jang, Joung Kyu Park
|
| 소속 |
Korea Research Institute of Chemical Technology |
| 키워드 |
Iron oxide; Iron nanoparticles; Reduction process; Core-shell structure
|
| E-Mail |
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