Insin Numpon, Tracy Joseph B, Lee Hakho, Zimmer John P, Westervelt Robert M, Bawendi Moungi G
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
ACS Nano. 2008 Feb;2(2):197-202. doi: 10.1021/nn700344x.
We describe the synthesis of magnetic and fluorescent silica microspheres fabricated by incorporating maghemite (gamma-Fe2O3) nanoparticles (MPs) and CdSe/CdZnS core/shell quantum dots (QDs) into a silica shell around preformed silica microspheres. The resultant approximately 500 nm microspheres have a narrow size distribution and show uniform incorporation of QDs and MPs into the shell. We have demonstrated manipulation of these microspheres using an external magnetic field with real-time fluorescence microscopy imaging.
我们描述了磁性和荧光二氧化硅微球的合成方法，该方法是通过将磁赤铁矿（γ-Fe2O3）纳米颗粒（MPs）和CdSe/CdZnS核壳量子点（QDs）掺入预先形成的二氧化硅微球周围的二氧化硅壳中实现的。所得的约500 nm微球具有窄的尺寸分布，并显示量子点和磁性纳米颗粒均匀地掺入壳中。我们已经通过实时荧光显微镜成像证明了使用外部磁场对这些微球进行操控。
