Engineering Low-Aspect Ratio Carbon Nanostructures: Nanocups, Nanorings, and Nanocontainers
Engineering Low-Aspect Ratio Carbon Nanostructures: Nanocups, Nanorings, and Nanocontainers
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DOI：
10.1021/nn9001903
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发表时间：
2009-05-01
期刊：
影响因子：
17.1
通讯作者：
Jung, Yung Joon
中科院分区：
文献类型：
--
作者：
Chun, Hyunkyung;Hahm, Myung Gwan;Jung, Yung Joon
碳纳米结构的合成，具有有趣的形态，已经在纳米技术领域引发了一场革命；碳纳米管就是一个很好的例子，但石墨碳的其他纳米形态也可以提供令人信服的用途。特别是短结构，包括非常短的纳米管，由于在初始阶段难以控制和终止生长，已被证明是不可能通过现有技术生长的。在这里，我们展示了由石墨碳设计的结构，与传统的纳米管相比，其长度/直径（L/D）比要小10(5)倍，揭示了纳米杯、纳米环和大面积连接纳米杯阵列的独特形态。这种高度工程化的中空纳米结构是在阳极氧化铝模板内使用精确控制的短纳米孔制造的。纳米杯被有效地用于容纳和容纳其他纳米材料，例如金属纳米颗粒，从而形成具有不同寻常形态的多组分混合纳米结构。本文报道的结果开辟了在纳米技术应用中整合石墨碳新形态的可能性。
The synthesis of carbon nanostructures, with interesting morphologies, has created a revolution in nanotechnology; carbon nanotube is a case in point, but other nanoscale morphologies of graphitic carbon could provide compelling uses. In particular short structures, including very short nanotubes, have proven impossible to be grown by existing techniques due to the difficulty in controlling and terminating growth during initial stages. Here we present architectures engineered from graphitic carbon, having up to 10(5) times smaller length/diameter (L/D) ratios compared to conventional nanotubes, revealing unique morphologies of nanocups, nanorings, and large area connected nanocup arrays. Such highly engineered hollow nanostructures were fabricated using precisely controlled short nanopores inside anodic aluminum oxide templates. The nanocups were effectively used to hold and contain other nanomaterials, for example, metal nanoparticles, leading to the formation of multicomponent hybrid nanostructures with unusual morphologies. The results reported here open up possibilities to integrate new morphologies of graphitic carbon in nanotechnology applications.