Single-walled carbon nanotubes dimensions

Metallic nanoparticles and single-walled carbon nanotubes (SWCNTs) exhibit nanoscale dimensions comparable with the dimensions of redox proteins. This enables the construction of NP-enzyme or SWCNT-enzyme hybrids that combine the unique conductivity features of the nanoelements with the biocatalytic redox properties of the enzymes, to yield wired bioelectrocatalyts with large electrode surface areas. Indeed, substantial advances in nanobiotechnology were achieved by the integration of redox enzymes with nanoelements and the use of the hybrid systems in different bioelectronic devices.35... 

Figure 17 (a) High-resolution electron micrograph of a 2 x 2 KI crystal inside a single-walled carbon nanotube (b,c) side and end views of the 2 X 2 KI crystal showing the lattice dimensions. (Reprinted with permission from Ref. 91. 2002 American Chemical Society)... 

An additional factor which may modify the lung toxicity and corresponding risk following exposures to engineered nanoparticulates is the electrostatic attraction/aggregation or agglomeration potential of some nanoscale materials, such as single wall carbon nanotubes (SWCNT). The dimensions of individual SWCNTs have been reported as Inm (diameter... 

As tip-sample convolution occurs due to the finite size of the probe, it is obvious that the effect would be reduced by further miniaturizing the probe s dimensions. With some success, recent attempts to achieve this goal have utilized single-walled carbon nanotubes attached to the apexes of regular AFM probes. Commercially available sharpened silicon oxide probes can also help improve the attainable level of resolution. 

The nanotube of 2 is able to solubiUze single-walled carbon nanotubes (SWNTs) in water. On solubihzation of SWNTs, the organic nanotubes do not change their dimensions, as confirmed by TEM (Fig. 2c), but show significant fluorescence quenching. Based on these observations, the authors suggest that tubularly assembled 2 encapsulates SWNTs into its hydrophobic hollow space. In contrast, compound 2 is unable to solubiUze SWNTs in THF, where 2 is molecularly dispersed. Therefore, not only the ring-shape of... 

Nanotubes. If the ends of the nanotube shown in Figure 8-16 are uncapped, the result is a hollow tube of very small dimension. Such ilanombes have been synthesized both with single and multiple walls (multiple layers built up on the outside of the innermost tube). One of the most promising potential applications of such structures is in the electronics industry. Extensive work has been done to devise methods for constructing computer circuits that use carbon nanotubes, and the nanombes have been cited as the leading candidate to replace silicon when the size limit on miniaturization of silicon chips has been reached. ... 

A principal distinction can be made between single-walled nanotubes (SWNT) and multiwalled nanotubes (MWNT). Both classes comprise species of most different diameters and lengths. Besides dimensions, it is also the way the graphene layer is rolled up to be a tube that dominantly influences the properties of the resulting materials. Furthermore, there may or may not be caps at the tubes ends, the respective structures then are called closed or open carbon nanotubes. The structural features of single-walled nanotubes will be discussed first in the following before the concept shall be extended to the multiwalled variants then. 

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