Journal
CHEMISTRY OF MATERIALS
Volume 22, Issue 8, Pages 2466-2473Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm902883p
Keywords
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Funding
- CEINT (international Center for the Environmental Implications of Nanotechnology)
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The growth mechanisms of imogolite-like aluminogermanate nanotubes have been examined at various stages of their formation. The accurate determination of the nucleation stage was examined using a combination of local- (XAS at the Ge-K edge and (27)Al NMR) and semilocal scale technique (in situ SAXS) For the first time, a model is proposed for the precursors of the nanotubular structure and consist in rooftile-shaped particles, up to 5 nm in size, with ca. 26% of Ge vacancies and varying curvatures. These precursors assemble to form short nanotubes/nanorings observed during the aging process. The final products are most probably obtained by an edge-edge assembly of these short nanotube segments
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