Atomically Resolved Single-Walled Carbon Nanotube Intramolecular Junctions

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Atomically Resolved Single-Walled Carbon Nanotube Intramolecular Junctions

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Title: Atomically Resolved Single-Walled Carbon Nanotube Intramolecular Junctions
Author: Cheung, Chin Li; Ouyang, Min; Huang, Jin-Lin; Lieber, Charles

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Citation: Ouyang, Min, Jin-Lin Huang, Chin Li Cheung, and Charles M. Lieber. 2001. Atomically resolved single-walled carbon nanotube intramolecular junctions. Science 291(5501): 97-100.
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Abstract: Intramolecular junctions in single-walled carbon nanotubes are potentially ideal structures for building robust, molecular-scale electronics but have only been studied theoretically at the atomic level. Scanning tunneling microscopy was used to determine the atomic structure and
electronic properties of such junctions in single-walled nanotube samples. Metal-semiconductor junctions are found to exhibit an electronically sharp interface without localized junction states, whereas a more diffuse interface and low-energy states are found in metal-metal junctions. Tight-binding calculations for models based on observed atomic structures show good agreement with spectroscopy and provide insight into the topological defects forming intramolecular junctions. These studies have important implications for applications of present materials and provide a means for assessing efforts designed to tailor intramolecular junctions for nanoelectronics.
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