Template nanotubes

Delpeux-Ouldriane, S., Szostak, K., Frackowiak, E., and Beguin, F. Annealing of template nanotubes to well-graphitized multi-walled carbon nanotubes. Carbon 44, 2006 799-823. 

The current-potential characteristics (Fig. 9.20), which are the most indicative for practical fuel cell performance, were also investigated to select the optimal and the most advantageous catalyst support from nanotubular material. It is clearly seen that KOH-activated nanotubes with a defected texture, enriched in oxygen and aggravated conductivity, show the worse characteristic, whereas graphitized NTs have the best performance. However, templated nanotubes show definitively better performance than raw catalj ic nanotubes, most probably due to the wide central canal that accelerates diffusion of reagents as well as oxidation products. 

If the template effect of Endo and Kroto[9] does indeed exist and the growth of the tubule occurs outwards, a knowledge of the characteristics of the innermost tube is then of paramount importance in any attempt at modelizing the structure of a symmetric nanotube[ll]. By reversing eqn (17), possible values for Px and Qx can be obtained from... 

Meegan JE, Aggeli A, Boden N et al (2004) Designed self-assembled beta-sheet peptide fibrils as templates for silica nanotubes. Adv Fund Mater 14 31-37... 

Yuwono VM, Hartgerink JD (2007) Peptide amphiphile nanofibers template and catalyze silica nanotube formation. Langmuir 23 5033-5038... 

Although random and irregular type GaN nanorods have been prepared by using transition metal nanoparticles, such as Ni, Co, and Fe as catalysts and carbon nanotubes as the template, the preparation of controllable regular array of strai t GaN nanorods has not yet been reported. Fabrication of well-ordered nano-structures with high density is very important for the application of nano-structures to practical devices. 

Xi D, Pei Q (2007) In situ preparation of free-standing nanoporous alumina template for polybithiophene nanotube arrays with a concourse base. Nanotechnology 18 095602... 

Porous Membranes of Nanoparticies from Templating Against AAO Membranes Using LB Technique. AAO-porous substrate has broad applications in making metal and semiconductor nanowires, aligned mesostructured nanorods, inorganic nanotubes. 

Porous aluminum oxide can be used as a template for the production of nanowires and nanotubes. For example, metals can be deposited on the pore walls by the following procedures deposition from the gas phase, precipitation from solution by electrochemical reduction or with chemical reducing agents, or by pyrolysis of substances that have previously been introduced into the pores. Wires are obtained when the pore diameters are 25 nm, and tubes from larger pores the walls of the tubes can be as thin as 3 nm. For example, nanowires and nanotubes of nickel, cobalt, copper or silver can be made by electrochemical deposition. Finally, the aluminum oxide template can be removed by dissolution with a base. 

An alternative route to obtain NbS2-sheathed carbon nanotubes (CNT) has been proposed by Zhu et al. [71] with this sonochemical method. In this study, CNTs act as templates to produce the uniform and well-crystallized bS2 nanotubes and the formation of such nanotubes has been explained by means of multi-point nuclei site growth mechanism. 

Zhou, Y. and Shimizu, T. (2008) Lipid nanotubes a unique template to create diverse one-dimensional nanostructures. Chemistry of Materials, 20 (3), 625-633. Nogawa, K., Tagawa, Y., Nakajima, M., Arai, F., Shimizu, T., Kamiya, S. and Fukuda, T. (2007) Development of novel nanopipette with a lipid nanotube as nanochannel. Journal of Robotics and Mechatronics, 19 (5), 528-534. 

Fig. 7.9 SEM images of HSA nanotubes pre- (C) The length of the resulting nanotubes is pared by self-assembly in AAO membranes. about 60pm. (D) Highlyflexible HSA nanotubes. (A) HSA nanotube arrays afterthe removal ofthe (Reproduced from [93] with permission of the AAO template. (B) Highly ordered HSA nano- American Chemical Society, Copyright 2005 tubes with a wall thickness of around 30 nm. American Chemical Society).

Fig. 7.10 Schematic representation of fluorescent nanotubes prepared through the alternate deposition of PEI and PTCDA in AAO membrane templates. (Reproduced from [119] with permission of the American Chemical Society, Copyright 2006 American Chemical Society).

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