The structural and conducting properties of single-wall carbon nanotubes SWCNs in embedded as well as in side contact with metal leads are obtained using efficient formalisms based on spin polarized tight-binding formulation incorporating full consideration of s, p, and d basis sets for carbon and metal atoms. The full structural relaxation of the combined SWCN and metal system is found to be e...

Two approaches for predicting elastic properties of SWCN/polymer composites, equivalentcontinuum modeling and the self-similar approach, are presented and compared in terms of assumptions and ranges of validity. Both models incorporate information about molecular interactions at the nanometer length scale into a continuum-mechanics based model. It is shown that the two approaches can predict el...

We demonstrate a new, versatile class of nanoscale chemical sensors based on single-stranded DNA (ss-DNA) as the chemical recognition site and single-walled carbon nanotube field effect transistors (swCN-FETs) as the electronic read-out component. swCN-FETs with a nanoscale coating of ss-DNA respond to gas odors that do not cause a detectable conductivity change in bare devices. Responses of ss...

We use impedance spectroscopy to measure the high-frequency properties of single-walled carbon nanotube field effect transistors (swCN-FETs). Furthermore, we extend scanning gate microscopy (SGM) to frequencies up to 15 MHz and use it to image changes in the impedance of swCN-FET circuits induced by the SGM tip gate. In contrast to earlier reports, the results of both experiments are consistent...

DNA-carbon nanotube hybrids (DNA-CN) are novel nanoscale materials that consist of single-wall carbon nanotubes (SWCN) coated with a self-assembled monolayer of single-stranded DNA (ssDNA). Recent experiments on DNA-CN have shown that this material offers a remarkable set of technologically useful properties such as facilitation of SWCN sorting, chemical sensing, and detection of DNA hybridizat...

The structural and conducting properties of single-wall carbon nanotubes SWCNs in soldered configuration is obtained using efficient formalisms based on spin-polarized tight-binding formulation incorporating full consideration of s, p, and d basis sets for carbon and metal atoms. The full structural relaxation of the combined SWCN and metal system is found to be essential for realistic characte...

We report a theoretical analysis of the phonon thermal conductance, κ(T ), for single wall carbon nanotubes (SWCN). In a range of low temperatues up to 100K, κ(T ) of perfect SWCN is found to increase with temperature, approximately, in a parabolic fashion. This is qualitatively consistent with recent experimental measurements where the tube-tube interactions are negligibly weak. When the carbo...

Our investigations reveal that the bonding of the transition-metal atoms on a single-wall carbon nanotube ~SWCN! depends on the detailed contact conditions. On the basis of our results, we suggest that the early 3-d elements ~Sc, Ti, and V! can be expected to be good candidates for making metal–SWCN contacts of low resistance, while contacts employing the late 3-d elements ~Fe, Co, and Ni! and ...

the effective parameters of (5, 0) and (5, 5) single-wall carbon nanotubes during the interaction with carbon dioxide as sensors are determined. the interaction of carbon dioxide  molecules with internal and external walls of the nanotubes is studied using gaussian 03 coding by density functional theory (dft) at the b3lyp/6-311g level of theory. co2 rotation around tube axles vertically and par...