Open Access Nano Express

Selective growth of palladium and titanium dioxide nanostructures inside carbon nanotube membranes

Samuel Hevia1, Pía Homm1, Andrea Cortes2, Verónica Núñez3, Claudia Contreras3, Jenniffer Vera34 and Rodrigo Segura3*

Author affiliations

1 Departamento de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackena, 4860, Santiago, Chile

2 Departamento de Física, Universidad Técnica Federico Santa María, Av. España, 1680, Valparaíso, Chile

3 Departamento de Química y Bioquímica, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña, 1111, Valparaíso, Chile

4 Programa Conjunto de Doctorado en Ciencias Mención Química, Universidad Técnica Federico Santa María - Universidad de Valparaíso, Valparaíso, Chile

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Citation and License

Nanoscale Research Letters 2012, 7:342  doi:10.1186/1556-276X-7-342

Published: 25 June 2012

Abstract

Hybrid nanostructured arrays based on carbon nanotubes (CNT) and palladium or titanium dioxide materials have been synthesized using self-supported and silicon-supported anodized aluminum oxide (AAO) as nanoporous template. It is well demonstrated that carbon nanotubes can be grown using these membranes and hydrocarbon precursors that decompose at temperatures closer to 600°C without the use of a metal catalyst. In this process, carbonic fragments condensate to form stacked graphitic sheets, which adopt the shape of the pores, yielding from these moulds' multi-walled carbon nanotubes. After this process, the ends of the tubes remain open and accessible to other substances, whereas the outer walls are protected by the alumina. Taking advantage of this fact, we have performed the synthesis of palladium and titanium dioxide nanostructures selectively inside carbon nanotubes using these CNT-AAO membranes as nanoreactors.

Keywords:
carbon nanotubes; nanohybrids; palladium nanoparticles; titanium oxide; 81.07.-b; 81.15.Gh; 81.07.De