Hierarchical nanostructures of PbTiO3 through mesocrystal formation.
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 microm 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.
Department of Materials Science and Engineering, Norwegian University of Science and Technology, Trondheim 7491, Norway.
Guozhong
G
Wang
Ragnhild
R
Saeterli
Per Martin
PM
Rorvik
Antonius
A
van Helvoort
Randi
R
Holmestad
Tor
T
Grande
Mari-Ann
MA
Einarsrud
D003460:Crystallization / Q000379:methods*; D007854:Lead / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D046911:Macromolecular Substances; C481719:lead titanate; D007854:Lead; D014025:Titanium