Engineering Low-Aspect Ratio Carbon Nanostructures: Nanocups, Nanorings, and Nanocontainers

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• 作者：Hyunkyung Chun ; Myung Gwan Hahm ; Yoshikazu Homma ; Rebecca Meritz ; Koji Kuramochi ; Latika Menon ; Lijie Ci ; Pulickel M. Ajayan ; Yung Joon Jung
• 刊名：ACS Nano
• 出版年：2009
• 出版时间：May 26, 2009
• 年：2009
• 卷：3
• 期：5
• 页码：1274-1278
• 年卷期：0
• ISSN：1936-086X

文摘

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 10⁵ 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.