Scrolled Sheet Precursor Route to Niobium and Tantalum Oxide Nanotubes

The nanoscroll-to-nanotube thermal transformation was studied for H4Nb6O17·4.4H2O scrolls, prepared by exfoliation of K4Nb6O17. Thermal dehydration of the scrolls produces Nb2O5 nanotubes at 400−450 °C. The nontopochemical transformation results in polycrystalline nanotubes; however, significant tex...

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Veröffentlicht in:Nano letters 2007-07, Vol.7 (7), p.2142-2145
Hauptverfasser: Kobayashi, Yoji, Hata, Hideo, Salama, Magda, Mallouk, Thomas E
Format: Artikel
Sprache:eng
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Zusammenfassung:The nanoscroll-to-nanotube thermal transformation was studied for H4Nb6O17·4.4H2O scrolls, prepared by exfoliation of K4Nb6O17. Thermal dehydration of the scrolls produces Nb2O5 nanotubes at 400−450 °C. The nontopochemical transformation results in polycrystalline nanotubes; however, significant texturing with respect to the tube axis is observed. Substituting Ta for Nb in the precursor compound led to a lower yield of scrolls, most likely because there is less built-in lattice strain to drive scrolling of the unilamellar colloidal sheets.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl0708260