Electronic structure of atomically resolved carbon nanotubes

Structure−Property Relationships for Electron−Vibrational Coupling in Conjugated Organic Oligomeric Systems

“…The differences in the long chain limit of the phenyl versus the acenes series mirrors the differences in band gaps of cis versus trans polyacetylene 7 and zigzag versus armchair singlewalled carbon nanotubes. 23 In extrapolation to the infinite-chainlength limit, questions have been raised as to the role of electron-vibrational coupling. Polarons, bipolarons, and selftrapped excitons have all been reported in polymeric systems, and the debate continues over the chain length at which excited states are no longer distributed over the molecule continues.…”

Chemistry of Single-Walled Carbon Nanotubes

“…[22][23][24][25] It is now known that SWNTs can behave as metals, semiconductors, or small band-gap semiconductors, [26][27][28] depending upon their diameter and chirality. 29 Electronic transitions between the energy bands of SWNTs ( Figure 2) can be observed by standard spectroscopic techniques.…”

“…commercially available SWNT preparations readily allow the observation of the first and second electronic transitions in the semiconducting nanotubes (S 11 and S 22 ) and the first transition in the metallic nanotubes (M 11 ). 30 In addition, transitions at the Fermi level (Figure 4) of the metallic SWNTs (M 00 ) are observable in the far-IR region of the electromagnetic spectrum.…”

The 2008 Kavli Prize in Nanoscience: Carbon Nanotubes

“…[1][2][3][4][5][6][7] One particularly interesting example of miniaturized structures are one-dimensional (1-D) nanomaterials, such as carbon nanotubes and nanowires (NWs), with molecular-scale diameters and microscale lengths. [1][2][3][4][5][6][8][9][10][11][12][13][14][15] In recent years, significant progress has been made in the synthesis, assembly, understanding of the fundamental properties, and design of novel applications based on 1-D materials, a small subset of which are summarized in this article.…”

“…Carbon can be found in 3-D (diamond or graphite), 2-D (graphene sheets), 1-D (carbon nanotubes), or 0-D (buckyball) structures ( Figure 1). 6 15 With diameters as small as ϳ0.4 nm (ϳ100000ϫ thinner than a human hair) 16,17 and lengths as long as 1 cm, these high-aspect ratio materials are perhaps the closest reallife analogue to an ideal 1-D system ( Figure 2). Their unique carbonϪcarbon bonding network and 1-D structure give rise to a number of interesting properties.…”