Dumbbell-like bifunctional Au-Fe3O4 nanoparticles
Dumbbell-like bifunctional Au-Fe3O4 nanoparticles
复制标题
DOI：
10.1021/nl047955q
复制
发表时间：
2005-02-01
期刊：
影响因子：
10.8
通讯作者：
Sun, SH
中科院分区：
文献类型：
--
作者：
Yu, H;Chen, M;Sun, SH
利用Fe(CO)(5)在Au纳米颗粒表面的分解，然后在1-十八烯溶剂中氧化，合成了哑铃型Au-Fe3O4纳米颗粒。Au的颗粒尺寸为2~8 nm，Fe3O4的颗粒尺寸为4~20 nm。Au的表面等离子体吸收和Fe3O4的磁性受Au和Fe3O4之间相互作用的影响。哑铃是通过在Au种子上外延生长氧化铁而形成的，由于使用二苯醚会生成花状的Au-Fe3O4纳米颗粒，因此生长会受到溶剂极性的影响。
Dumbbell-like Au-Fe3O4 nanoparticles are synthesized using decomposition of Fe(CO)(5) on the surface of the Au nanoparticles followed by oxidation in 1-octadecene solvent. The size of the particles is tuned from 2 to 8 nm for Au and 4 nm to 20 nm for Fe3O4. The particles show the characteristic surface plasmon absorption of Au and the magnetic properties of Fe3O4 that are affected by the interactions between Au and Fe3O4. The dumbbell is formed through epitaxial growth of iron oxide on the Au seeds, and the growth can be affected by the polarity of the solvent, as the use of diphenyl ether results in flower-like Au-Fe3O4 nanoparticles.