Growth of colloidal nanoparticles of group II–VI and IV–VI semiconductors on top of magnetic iron–platinum nanocrystals
Growth of colloidal nanoparticles of group II–VI and IV–VI semiconductors on top of magnetic iron–platinum nanocrystals
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DOI：
10.1039/b804154g
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发表时间：
2008-09
影响因子：
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通讯作者：
M. Zanella;A. Falqui;S. Kudera;L. Manna;M. Casula;W. Parak
中科院分区：
文献类型：
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作者：
M. Zanella;A. Falqui;S. Kudera;L. Manna;M. Casula;W. Parak
成功地生长了在FePt颗粒顶部具有II-VI和IV-VI颗粒气泡的胶体混合纳米颗粒。而在XE = CdS，ZnS，PbS和CdSe的情况下，成功地获得了FePt-XE二聚体结构，而XE = ZnSe，PbSe的生长失败。结构，磁性和光学分析的结构揭示了一个温和的影响的半导体域的FePt核心颗粒的磁性，这可以归因于退火条件，原子扩散和异质结构形成过程中的组成变化的效果。另一方面，我们报告了一个显着的荧光猝灭的半导体泡由于底层的FePt颗粒。
Colloidal hybrid nanoparticles with blebs of II–VI and IV–VI particles on top of FePt particles were successfully grown. Whereas in the case of XE = CdS, ZnS, PbS and CdSe, FePt–XE dimer structures were successfully obtained, the growth failed for XE = ZnSe, PbSe. Structural, magnetic, and optical analysis of the structures revealed a moderate influence of the semiconductor domain on the magnetic properties of the FePt core particle, which can be ascribed to the effect of annealing conditions, atom diffusion and compositional variations during heterostructure formation. On the other hand, we report a significant fluorescence quenching of the semiconductor bleb due to the underlying FePt particle.