Hierarchical Nanostructures of PbTiO3 Through Mesocrystal Formation
Authors: Wang, Guozhong; Saeterli, Ragnhild; Rørvik, Per Martin; Van Helvoort, Antonius; Holmestad, Randi; Grande, Tor; Einarsrud, Mari-Ann
Source: Journal of Nanoscience and Nanotechnology, Volume 7, Number 7, July 2007 , pp. 2538-2541(4)
Publisher: American Scientific Publishers
Abstract:Novel hierarchical self-assembled structures; bur-like PbTiO3 nanostructures were made by self-assembly of PbTiO3 nanocrystals under hydrothermal conditions using sodium dodecylbenzene sulfonate surfactant. The bur-like nanostructures exhibit a unique geometrical shape with cores of agglomerated nanocrystals and outershells of nanorods. The nanorods were between 30 nm and 100 nm in diameter and from several hundred nm up to 2 m in length. We demonstrate that these nanostructures are formed in a two step process where agglomeration of PbTiO3 nanoparticles into microspheres occurs in a first step, followed by assembly of cube-shaped nanoparticle building blocks into PbTiO3 mesocrystals in a second step. The mesocrystals continuously grow into nanorods from the surface of the microspheres acting as a substrate.
Document Type: Short Communication
Publication date: July 2007
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