采用高温有机前驱体分解法,以Fe(acac)3为前驱体制备出单分散性较好的Fe3O4纳米粒子,粒径为(6.4±0.90)nm.利用TEM、XRD、HPPS、FTIR等手段对粒子的形貌及性质进行了研究,证实得到的是Fe3O4单晶,粒子表层的铁原子通过共价键和油酸分子中-COO的两个氧原子结合在一起.通过对自组装过程的初步研究表明随磁性纳米粒子浓度的增加,粒子排布逐渐由零星的无规排列变为规整的单层和多层有序结构.
参考文献
[1] | Raj K;Moskowitz R .[J].Journal of Magnetism and Magnetic Materials,1990,85:233. |
[2] | Oswald P;Clement O;Chambon C;SchoumanClaeys E;Frija G .Liver positive enhancement after injection of superparamagnetic nanoparticles: Respective role of circulating and uptaken particles[J].Magnetic resonance imaging: An International journal of basic research and clinical applications,1997(9):1025-1031. |
[3] | Hergt R.;Andra W. .Physical limits of hyperthermia using magnetite fine particles[J].IEEE Transactions on Magnetics,1998(5):3745-3754. |
[4] | Jordan A;Scholz R;Wust P et al.[J].Journal of Magnetism and Magnetic Materials,1999,201:413. |
[5] | Maoz R;Frydman E;Cohen S R et al.[J].Journal of Advanced Materials,2000,12:424. |
[6] | Stephen F;Hakan R;Nagaraja R S et al.[J].Chemistry of Materials,2002,14:3643. |
[7] | Sun S H;Zeng H;Robinson D B et al.[J].Journal of the American Chemical Society,2004,126:273. |
[8] | Rockenberger J;Scher E C;Alivisatos A P .[J].Journal of the American Chemical Society,1999,121:11595. |
[9] | Sun S H;Zeng H .[J].Journal of the American Chemical Society,2002,124:8204. |
[10] | Hyeon T;Lee S S;Park J et al.[J].Journal of the American Chemical Society,2001,123:12798. |
[11] | Bourlinos AB.;Bakandritsos A.;Georgakilas V.;Petridis D. .Surface modification of ultrafine magnetic iron oxide particles[J].Chemistry of Materials,2002(8):3226-0. |
[12] | Wang Y;Teng X;Wang J S et al.[J].Nano Letters,2003,3:789. |
[13] | Liu Q;Xu Z .[J].Langmuir,1995,11:4617. |
[14] | Wang ZL. .Structural analysis of self-assembling nanocrystal superlattices [Review][J].Advanced Materials,1998(1):13-30. |
[15] | Korgel B A;Fullam S;Connolly S et al.[J].Journal of Physical Chemistry B,1998,102:839. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%