Controlling self-assembled perovskite-spinel nanostructures.

Three-dimensional heteroepitaxy in self-assembled BaTiO3–CoFe2O4 nanostructures

Self-assembled BaTiO3–CoFe2O4 complex oxide nanostructures have been synthesized by pulsed laser deposition. A single ceramic target with a molar ratio of 0.62BaTiO3–0.38CoFe2O4 was used. Spinel CoFe2O4 and perovskite BaTiO3 phases spontaneously separated during heteroepitaxial growth on a single-crystal SrTiO3 s001d substrate. The nanostructures are epitaxial in-plane as well as out-of-plane, ...

Self-assembled perovskite-spinel heterostructure on a highly distorted substrate

Hierarchical Assembly of Multifunctional Oxide-based Composite Nanostructures for Energy and Environmental Applications

Composite nanoarchitectures represent a class of nanostructured entities that integrates various dissimilar nanoscale building blocks including nanoparticles, nanowires, and nanofilms toward realizing multifunctional characteristics. A broad array of composite nanoarchitectures can be designed and fabricated, involving generic materials such as metal, ceramics, and polymers in nanoscale form. I...

Growth and Characterization of Multiferroic Batio3-cofe2o4 Thin Film Nanostructures

Title of Dissertation: GROWTH AND CHARACTERIZATION OF MULTIFERROIC BATIO3-COFE2O4 THIN FILM NANOSTRUCTURES Haimei Zheng, Doctor of Philosophy, 2004 Dissertation Directed By: Professor Lourdes Salamanca-Riba Professor Ramamoorthy Ramesh Department of Materials Science and Engineering Multiferroic materials which display simultaneous ferroelectricity and magnetism have been stimulating significan...

Ferroelectric Self-assembled PbTiO3 Perovskite Nanostructures onto (100)SrTiO3 Substrates from a Novel Microemulsion Aided Sol-Gel Preparation

As the dimension of the microelectronic devices keep shrinking there is a pressing need to increase the dielectric constant of the gate oxide. Fabrication of the gate oxide out of ferroelectric nanostructure provides a possible solution. However, new approaches to the fabrication of ferroelectric nanostructures onto substrates are needed before nanoscale ferroelectrics can be successfully integ...