Size-Dependent Diffusion Penetrability of Nanomaterials

Paritskaya, L. N.; Kaganovsky, Yuri S.; Богданов, В. В.

doi:10.4028/www.scientific.net/ssp.94.25

Cited by 2 publications

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“…Moreover, the thin protonic titanate nanotube may be in a structurally nonequilibrium state and, therefore, merely rearrange into its more stable thermodynamic state. Not surprisingly, for the thin protonic titanate nanotubes, a change of morphology to the thermodynamically more stable sphere, cube, or rhombohedron may occur, before the constituent ions have had the opportunity to diffuse, reorganize, and ultimately attain their kinetic equilibrium positions in the product. , …”

Section: Resultsmentioning

confidence: 99%

Size- and Shape-Dependent Transformation of Nanosized Titanate into Analogous Anatase Titania Nanostructures

2006

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A size- and shape-dependent morphological transformation was demonstrated during the hydrothermal soft chemical transformation, in neutral solution, of titanate nanostructures into their anatase titania counterparts. Specifically, lepidocrocite hydrogen titanate nanotubes with diameters of approximately 10 nm were transformed into anatase nanoparticles with an average size of 12 nm. Lepidocrocite hydrogen titanate nanowires with relatively small diameters (average diameter range of < or = 200 nm) were converted into single-crystalline anatase nanowires with relatively smooth surfaces. Larger diameter (>200 nm) titanate wires were transformed into analogous anatase submicron wire motifs, resembling clusters of adjoining anatase nanocrystals with perfectly parallel, oriented fringes. Our results indicate that as-synthesized TiO2 nanostructures possessed higher photocatalytic activity than the commercial titania precursors from whence they were derived.

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Section: Resultsmentioning

confidence: 99%