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Nano-urchin: The formation and structure of high-density spherical clusters of vanadium oxide nanotubes
O'Dwyer, Colm; Navas, D.; Lavayen, Vladimir; Benavente, Eglantina; Santa-Ana, María A.; Gonzalez, Guillermo; Newcomb, Simon B.; Sotomayor Torres, Clivia M.
We report the observation of urchin-like nanostructures consisting of high-density spherical nanotube radial arrays of vanadium oxide nanocomposite, successfully synthesized by a simple chemical route using an ethanolic solution of vanadium tri-isopropoxide and alkyl amine hexadecylamine for 7 days at 180oC. The results show that the growth process of the NanoUrchin occurs in stages, starting with a radial self-organized arrangement of lamina followed by the rolling of the lamina into nanotubes. The longest nanotubes are measured to be several micrometers in length with diameters of ~120 nm and hollow centers typically measured to be ~75 nm. The NanoUrchin have an estimated density of nanotubes of ~40 sr-1. The tube walls comprise layers of vanadium oxide with the organic surfactant intercalated between atomic layers. The interlayer distance is measured to be 2.9 ± 0.1 nm and electron diffraction identified the vanadate phase in the VOx nanocomposite as orthorhombic V2O5. These nanostructures may be used as three-dimensional composite materials and as supports for other materials.
Keyword(s): Nano-urchin; Nanotube; Nanocomposite; Nanostructure; Self-assembly; Vanadium oxide; Nanostructures
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Funder(s): Science Foundation Ireland
Citation(s): O'Dwyer, C,Navas, D,Lavayen, V,Benavente, E,Santa Ana, MA,Gonzalez, G,Newcomb, SB,Torres, CMS (2006) 'Nano-urchin: The formation and structure of high-density spherical clusters of vanadium oxide nanotubes'. Chemistry of Materials, 18 (13), pp. 3016-3022. doi: 10.1021/cm0603809
Publisher(s): American Chemical Society
File Format(s): application/pdf
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First Indexed: 2013-02-22 05:34:05 Last Updated: 2016-10-14 06:29:51