Preparation and structure investigation of nanoparticle-assembled titanium dioxide microtubes

Ma, Dongling; Schadler, Linda S.; Siegel, Richard W.; Hong, Jung-II
September 2003
Applied Physics Letters;9/1/2003, Vol. 83 Issue 9, p1839
Academic Journal
Nanoparticle-assembled capped TiO[sub 2] microtubes were synthesized by means of a recently discovered freeze-drying method. Most tubes are about 1 μm in diameter and have a high aspect ratio. The resulting structure was observed using field emission scanning electron microscopy and transmission electron microscopy. The crystal structure and chemical nature of the nanoparticle constituents and the resulting structures were investigated by x-ray diffraction, selected area energy dispersive x-ray spectroscopy, and Raman spectroscopy. The formation of the observed TiO[sub 2] microtubes occurs through the physical rearrangement or self-organization of nanoparticles, most likely driven by capillarity and aided by hydrogen bonding between nanoparticles and the water molecules during freeze-drying. © 2003 American Institute of Physics.


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