Fei Qiang, Xiao Dehai, Zhang Zhiquan, Huan Yanfu, Feng Guodong
Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2009 Oct 1;74(2):597-601. doi: 10.1016/j.saa.2009.06.056. Epub 2009 Jul 8.
A novel silica-coated multiwall carbon nanotube (MWNTs) with CdTe quantum dots nanocomposite was synthesized in this paper. Here, we show the in situ growth of crystalline CdTe quantum dots on the surfaces of oxidized MWNTs. The approach proposed herein differs from previous attempts to synthesize nanotube assemblies in that we mix the oxidized MWNTs into CdCl(2) solution of CdTe nanocrystals synthesized in aqueous solution. Reinforced the QD-MWNTs heterostructures with silica coating, this method is not invasive and does not introduce defects to the structure of carbon nanotubes (CNTs), and it ensures high stability in a range of organic solvents. Furthermore, a narrow SiO(2) layer on the MWNT-CdTe heterostructures can eliminate the biological toxicity of quantum dots and carbon nanotubes. This is not only a breakthrough in the synthesis of one-dimensional nanostructures, but also taking new elements into bio-nanotechnology.
本文合成了一种新型的二氧化硅包覆的多壁碳纳米管（MWNTs）与碲化镉量子点的纳米复合材料。在此，我们展示了在氧化的MWNTs表面原位生长结晶碲化镉量子点。本文提出的方法与先前合成纳米管组件的尝试不同，我们将氧化的MWNTs混入在水溶液中合成的碲化镉纳米晶体的氯化镉（CdCl₂）溶液中。用二氧化硅涂层增强量子点-多壁碳纳米管（QD-MWNTs）异质结构，该方法是非侵入性的，不会给碳纳米管（CNTs）的结构引入缺陷，并且确保了在一系列有机溶剂中的高稳定性。此外，MWNT-碲化镉异质结构上的窄二氧化硅层可以消除量子点和碳纳米管的生物毒性。这不仅是一维纳米结构合成方面的一项突破，还将新元素引入了生物纳米技术。
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