Nanotubes, template synthesis

Hijazi I, Bourgeteau T, C nut R, Morozan A, Filoramo A, Leroy J, Derycke V, Jousselme B, Campidelli S. Carbon nanotube-templated synthesis of covalent porphyrin network for oxygen reduction reaction. J Am Chem Soc 2014 136 6348-54. 

Figure 1.24 Silica nanotubes are formed by template synthesis using anisotropic materials (V307 H2Q, in this case.)...

Figure 1.26 Template synthesis using organic gels expands the versatility of the methodology, affording largely different silica nanotubes. (Reproduced from ref. 51, with permission.)...

Fig. 5.2 Structure of gelators employed for template synthesis of various nanotubes.

The advantage of template synthesis is that organo or hydrogelator templates can direct the shape-controlled synthesis of oxide nanotubes. Recent reports describe the use of carbon nanofibers as a template for the shape-controlled synthesis of zirconia, alumina and silica nanotubes [78]. The shape of vapor grown carbon nanofiber... 

It should be mentioned that alternative possibilities to prepare similar membranes include the use of a porous alumina membrane as matrix, with the titania nanotubes grown in the channels. Nanoporous alumina membranes are commercial products, also synthesized by anodic oxidation. The commercial Whatman Corporation anodic membrane has holes of about 20-nm diameter at the top of the membrane and about 200-nm diameter at the bottom of membrane. Within these pores Ti02 nanotubes fabricated by template synthesis and water vapour hydrolysis could be grown, but non-uniform membrane characteristics are obtained due to the non-uniform pores of the commercial alumina... 

Yang, Q.H., Xu, W.H., Tomita, A., and Kyotani, T. The template synthesis of double coaxial carbon nanotubes with nitrogen-doped and boron-doped multiwalls. J. Am. Chem. Soc. 127, 2005 8956-8957. 

Template Synthesis of Nanotubes and Some Recent Advances.694... 

TEMPLATE SYNTHESIS OF NANOTUBES AND SOME RECENT ADVANCES... 

FIGURE 24.2 Scanning electron micrographs. (A) The surface and cross section of a typical nanopore alumina template membrane prepared in the authors lab. Pores with monodisperse diameters that run like tunnels through the thickness of the membrane are obtained. (B) Silica nanotubes prepared by solgel template synthesis within the pores of a template like that shown in (A). After solgel synthesis of the nanotubes, the template was dissolved and the nanotubes were collected by filtration. (From Lee, S.B., Mitchell, D.T., Trofin, L., Li, N., Nevanen, T.K., Sbderlund, H., and Martin, C.R., Science, 296, 2198, 2002. With permission.)... 

The gold nanotube membranes were prepared via the template synthesis [21,22] method by electroless deposition of gold along the pore walls of a polycarbonate template membrane [19,43]. The template was a commercially available filter (Osmonics), 6 p.m thick, with cylindrical 30 nm diameter pores and 6 x 10 pores per square centimeters of membrane surface area. 

Fig. 11 Template synthesis of protein nanotube through LbL assembly. Micrographic image of HSA nanotubes were kindly provided by Prof. Junbai Li...

M. Mazur, M. Tagowska, B. Palys, and K. Jackowska, Template synthesis of polyaniUne and poly(2-methoxyaniUne) nanotubes comparison of the formation mechanisms, Electrochem. Common., 5, 403—407 (2003). 

S. H. Lee, and K.S. Ryu, Conducting polymer nanotube and nanowire synthesized by using nanoporous template Synthesis, characteristics, and applications, Synth. Met., 135, 7-9 (2003). 

Template Synthesis of Nanotubes AND Some Recent Advances... 

Xu, R, Wharton, J.E., Martin, C.R. Template synthesis of carbon nanotubes with diamond-shaped cross sections. Small 3, 1718-1722, 2007. 

PANI is one of the promising materials in supercapacitors due to its high capacitive characteristics, low cost, and easy synthesis. The materials in nanosize form with high surface area and high porosity give the best performance as electrode materials for supercapacitors because of their distinctive characteristics of conducting pathways, surface interactions, and nanoscale dimensions. The synthesis and capacitive characterization of high-surface-area nanomaterials, that is, nanotubes, nanowires, etc., have been carried out extensively in the past decades. Consequently, different indirect methods were used to synthesize nanosized PANI, such as template synthesis, self-assembly, emulsions, and interfacial polymerization. ... 

There are various methods to synthesize polymer nanostructures, i.e., template synthesis, chiral reactions, self-assembly, interfacial polymerization and electrospinning. Recent developments in conducting polymer nanotubes and nanofibers were summarized by Long et al. Different preparation methods, physical properties, and potential applications of one-dimensional nanostructures of conjugated polyaniline (PANI), pol5 3nrole (PPy) and poly (3, 4-ethylenediox3d hiophene) (PEDOT) were discussed. 

Recently, a facile soft template synthesis was developed for fabricating PPy nanotubes against the hard template synthesis [153,249]. PPy nanotubes could be readily produced through a cylindrical micelle templating in re-... 

Martin [21] proposed a mechanism for the growth of the nanostructures prepared by the hard-template method. However, the mechanism is insufficient in explaining the growth of partially filled nanotubes by an electrochemical template synthesis [36]. Recently, Lee and coworkers [37] investigated the electrochemical... 

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