In situ quantum dot growth on multiwalled carbon nanotubes
In situ quantum dot growth on multiwalled carbon nanotubes
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DOI：
10.1021/ja035980c
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发表时间：
2003-08-27
影响因子：
15
通讯作者：
Wong, SS
中科院分区：
文献类型：
--
作者：
Banerjee, S;Wong, SS
纳米级互连和超分子、分级组装的产生使得能够开发许多新颖的纳米级应用。一个合理的方法来工程一个强大的系统是通过化学识别。在这里，我们展示了在氧化的多壁碳纳米管（MWNTs）的表面上的晶体CdTe量子点的原位矿化。我们将量子点的金属前体直接配位到纳米管上，然后进行原位生长。由此产生的分子级“融合”纳米管-异质结网络展示了复杂纳米级异质结构的合成的受控合成路线。使用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨率透射电子显微镜（HRTEM）、能量色散X射线光谱（EDS）、X射线光电子能谱（XPS）、拉曼光谱、紫外-可见光谱和X射线衍射（XRD）对这些异质结构进行了广泛的表征。
The generation of nanoscale interconnects and supramolecular, hierarchical assemblies enables the development of a number of novel nanoscale applications. A rational approach toward engineering a robust system is through chemical recognition. Here, we show the in situ mineralization of crystalline CdTe quantum dots on the surfaces of oxidized multiwalled carbon nanotubes (MWNTs). We coordinate metallic precursors of quantum dots directly onto nanotubes and then proceed with in situ growth. The resulting network of molecular-scale "fused" nanotube-nanocrystal heterojunctions demonstrates a controlled synthetic route to the synthesis of complex nanoscale heterostructures. Extensive characterization of these heterostructures has been performed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, UV-visible spectroscopy, and X-ray diffraction (XRD).