Vertically aligned nanotubes

Forests of Vertically Aligned Nanotubes, 465 Horizontally Aligned SWNT, 467 Yams of Nanotubes, 468 Commercial Applications of Carbon Nanostructures, 469... 

Fig. 19.1 Schematic diagram of gas-ionized sensor with ID electrodes. Controlled DC voltage is applied between the anode (vertically aligned nanotube film) and the cathode (A1 sheet), which are separated by an insulator. The distance between the two electrodes could be adjusted in a range of 20-200 [im by the thickness of the plastic film or glass...

Figure 3.42 SEM image of vertically aligned nanotubes on silicone substrate. These nanotubes are like a forest ...

A number of groups have fabricated vertically aligned nanotube array-based DSSCs on flexible Ti substrates including foils, " grids, meshes and wires. It is hoped that the morphology will improve transport properties of the semiconductor and increase the efficiency of solid-state devices. However, problems with surface wetting and infiltration of the narrow pores will need to be overcome. Two configurations for nanotube-based DSSCs are considered below. 

FIGURE 15.31 A "forest" of carbon nanotubes that grew in vertical alignment in a "bottom-up" fashion. 

Lan el al. [52] have reported an approach for vertically aligning multi-wall carbon nanotubes on diverse substrates treated with polyelectrolyte. The shortened multi-wall carbon nanotubes were first functionalized with acyl chloride in thionyl chloride (SOCl2). 

Yu, J., et al., Electron transfer through [small alphaj-peptides attached to vertically aligned carbon nanotube arrays a mechanistic transition. Chemical Communications, 2012. 48(8) p. 1132-1134. 

Bissett, M.A., et al., Dendron growth from vertically aligned single-watted carbon nanotube thin layer arrays for photovoltaic devices. Physical Chemistry Chemical Physics, 2011.13(13) p. 6059-6064. 

Guzman de Villoria R, Hart AJ, Wardle BL. Continuous high-yield production of vertically aligned carbon nanotubes on 2D and 3D substrates.TtCS Nano. 2011 May 17 5(6) 4850-7. 

Work on the nanostructuring of electrodes with carbon nanotubes by Gooding and coworkers [96, 97] has demonstrated that superior electrochemical performance can be achieved with carbon nanotubes that are vertically aligned compared with being... 

Ellenbecker, M.J. and Wardle, B.L. (2008) Particle exposure levels during CVD growth and subsequent handling of vertically-aligned carbon nanotube films. Carbon, 46 (6), 974—977. 

Four different aryldiazonium salts have been used to functionalize SWCNTs through electrochemical reduction. By XPS and Raman diffusion measurements, the growth of aryl chains on the sidewalls of the nanotubes was observed [178]. Electrically addressable biomolecular functionalization of SWCNT electrodes and vertically aligned carbon nanofiber electrodes with DNA was achieved by elec-trochemically addressing (reduction) of nitrophenyl substituted nanotubes and nanofibers. Subsequently, the resulting amino functions were covalently linked to DNA forming an array of DNA-CNT hybrid nanostructures (Scheme 1.28) [179],... 

Figure 7 Scanning electron microscopy image of vertically aligned diphenylalanine-based peptide nanotubes assembled on a glass surface. The scale bar is 10 lm in length. Reprinted by permission from Macmillan Publishers Ltd., Nature Nanotechnology (Reches and Gazit, 2006), copyright 2006 (http //www.nature.com/nnano/index.html).

A good method to achieve these characteristics and suitable also for scale-up is the anodic oxidation of titanium thin foils to form ordered arrays of vertically aligned titania nanotubes [58-62]. 

SYNTHESIS OF VERTICALLY ALIGNED ARRAYS OF MIXED SINGLE/MULTI-WALLED CARBON NANOTUBES BY CVD METHOD WITH THE VOLATILE CATALYST... 

CVD method mostly used for multi-walled carbon nanotubes (MWNTs) synthesis ensures formation of vertically aligned MWNTs arrays [11]. As it was... 

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