Cable Structure

Work on the production and oxidation of SWNT samples at SRI and other laboratories has led to the observation of very long bundles of these tubes, as can be seen in Fig. 2. In the cleanup and removal of the amorphous carbon in the original sample, the SWNTs self-assemble into aligned cable structures due to van der Waals forces. These structures are akin to the SW nanotube crystals discussed by Tersoff and Ruoff they show that van der Waals forces can flatten tubes of diameter larger than 2.5 nm into a hexagonal cross-sectional lattice or honeycomb structure[17]. 

Since most SWNTs have diameters in the range of 1 -2 nm, we can expect them to remain cylindrical when they form cables. The stiffness constant of the cable structures will then be the sum of the stiffness constants of the SWNTs. However, just as with MWNTs, the van der Waals binding between the tubes limits tensile strength unless the ends of all the tubes can be fused to a load. In the case of bending, a more exact... 

Nanocarbon hybrids have recently been introduced as a new class of multifunctional composite materials [18]. In these hybrids, the nanocarbon is coated by a polymer or by the inorganic material in the form of a thin amorphous, polycrystalline or single-crystalline film. The close proximity and similar size domain/volume fraction of the two phases within a nanocarbon hybrid introduce the interface as a powerful new parameter. Interfacial processes such as charge and energy transfer create synergistic effects that improve the properties of the individual components and even create new properties [19]. We recently developed a simple dry wrapping method to fabricate a special class of nanocarbon hybrid, W03 /carbon nanotube (CNT) coaxial cable structure (Fig. 17.2), in which W03 layers act as an electrochromic component while aligned... 

Scheme 5.3 Carbodithioate-functionalized poly(octylthiophene) (left) and its hybrid with 3 nm CdSe nanocrystals (middle). Idealized double-cable structure allowing for efficient electron (e ) and hole (h+) transport (right).112 (Reprinted with permission from C. Querner et al., Chem. Mater. 2006,18, 4817-4826. Copyright 2006 American Chemical Society.)...

Selbi W, de la Motte CA, Hascall VC, Day AJ, Bowen T, Phillips AO. Characterization of hyaluronan cable structure and function in renal proximal tubular epithelial cells. Kidney... 

Fig. 9 Chemical system for mimicking an electrical extension cable. Structural formulas of the three molecular components 72+, 8-H+ and 92+ (a), which self-assemble in solution (CH2C12 room temperature) to give the 72+d8-H+d92+ triad (b). In the fully connected system, excitation with visible light of the Ru-based unit of 72+ is followed by electron transfer to 92+, with 8-H+ playing the role of an extension cable [58]...

Microbending Loss. As a result of their small diameters, optical fibers bend very readily. This feature is advantageous in that the transmission medium is very flexible and easily routed. However, when the spatial period of the bending becomes small (approx. 1 mm or less), some of the light rays normally guided by the fiber are lost through radiation. Such small period distortions may occur when a fiber is wound on a spool under tension or when it is placed in cable structure. The phenomenon is termed microbending (11), and... 

This is another excellent heuristic. It provides the suggestion that the configuration of our system should be developed in such a form as to minimize material-hungry bending and replace it, at least partially, by a configuration that mostly uses members under tension, which usually are much more material efficient for example, a beam could be replaced by a suspended cable structure. 

Conductor coils are commonly of a multifilament or cable structure instead of unifilar to make them more flexible and resistant to fracture. Unifilar conductor is a single wire wound spirally around a central axis (Fig. 1.12), whereas a multifilar cable consists of two or more wires wound together in parallel spirally around a central axis (Fig. 1.13) [1]. In a multifilar coil, each conductor strand is individually coated with a thin layer of insulator, and the entire helical coil is then insulated again with a thicker conventional insulator (Fig. 1.13) [1]. 

Wang C-L, Zhang W-B, Van Horn RM et al (2011) A potphyrin-fullerene dyad with a supramolecular double-cable structure as a novel electron acceptor for bulk heterojunction polymer solar cells. Adv Mater 23(26) 2951-2956... 

Cable structures, supporting platforms, etc. (including their anchoring) 1.0 D-1-1.0 L-I-1.0T-i-1.0SL... 

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