Influence of the substrate surface on the self-assembly of ferroelectric PbTiO nanostructures obtained by microemulsion assisted Chemical Solution Deposition
The achievement of long range periodicity of ferroelectric nanostructures on substrates remains as a challenge in the processing of devices by the relatively inexpensive self- assembly methods. To this aim, here we make the proposal of processing strategies involving commercial single-crystal SrTiO3...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/41073 |
| Acceso en línea: | http://hdl.handle.net/10261/41073 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanostructure Nanoestructura Self-assembly Auto-organización Ferroelectricity Ferroelectricidad Lead Titanate Plomo Titanato Microemulsion Microemulsión Surface Analysis Análisis Superficie SPM LEED Auger Spectroscopy Espectroscopía |
| Sumario: | The achievement of long range periodicity of ferroelectric nanostructures on substrates remains as a challenge in the processing of devices by the relatively inexpensive self- assembly methods. To this aim, here we make the proposal of processing strategies involving commercial single-crystal SrTiO3 (100) substrate surface treatment. The topography, global ordering and crystal symmetry of the surface of the treated substrates as well as the near surface layer composition were analysed by Scanning Force Microscopy, Low Energy Electron Diffraction and Auger Electron Spectroscopy, respectively. The study shows that a combination of chemical etching and thermal annealing in air produces smooth and well terraced surfaces which have steps of few unit cells height and a nearly complete TiO2 termination, , while keeping the 1x1 bulk structure. Preliminary results shows that PbTiO3 nanostructures, obtained by a novel microemulsion assisted Chemical Solution Deposition method onto such substrates, grow at regular distances and preferentially located at the edges of the substrate surface terraces. Thus, long range order of these nanostructures is envisaged when deposited onto substrates that are treated by the procedure here studied. |
|---|