Self-ordered nanostructured arrays of piezoelectric ZnO and BaTiO3 grown by anodization (NANOPIEZO)

• Unité de recherche: COST
• Numéro de projet: C15.0110
• Titre du projet anglais: Self-ordered nanostructured arrays of piezoelectric ZnO and BaTiO3 grown by anodization (NANOPIEZO)

Mots-clé (Anglais)

anodization; ZnO; BaTiO3; nanotubes; nanogenerators

Programme de recherche (Anglais)

COST-Action MP1407 - ELECTROCHEMICAL PROCESSING METHODOLOGIES AND CORROSION PROTECTION FOR DEVICE AND SYSTEMS MINIATURIZATION

Description succincte (Anglais)

This project aims at producing highly self-ordered arrays of piezoelectric materials, in particular ZnO and BaTiO3. At the core of the project is anodization which will be used to electrochemically oxidize metal sheets of Zn and Ti into fibrous self-oriented nanostructures of ZnO and TiO2. The anodization process will be conducted into special organic or aqueous electrolyte containing fluoride ions in the case of TiO2 and fluoride plus sulfide ions in the case of ZnO. Under such conditions, the growing metal oxide develops as a self-ordered array which grows perpendicular to the metal substrate under oxidation. Key parameters to be controlled during the growth of anodic ZnO and TiO2, will be the applied anodizing potential, the anodizing time, the pH of the electrolyte, the amount of water (when working in organic media) as they will determine the properties of the growing anodic oxides. Such structures will be comprehensively characterized in terms of microstructure, morphology (i.e. length of the film, inner and outer diameter of the nanopores/tubes) chemical composition and electrical properties. Additionally, in the case of TiO2, the hydrothermal conversion into BaTiO3 will be explored using Ba(OH)2 as reagent and working at a temperature of 200°C. The piezoelectric properties of ZnO and BaTiO3 will be characterized in terms of dielectric and electromechanical properties. Using the fundamental results from this project, the long term strategy will be the integration of such functional structures prepared by anodization and hydrothermal synthesis into semiconductor processing on Si wafer or CMOS in order to produce a fully working nanogenerator.

Autres indications (Anglais)

Full name of research-institution/enterprise: EMPA - Eidg. Materialprüfungs- und Forschungsanstalt Laboratorium für Hochleistungskeramik

Partenaires et organisations internationales (Anglais)

AT; BE; BG; CZ; DK; FR; MK; DE; EL; HU; IE; IL; IT; LT; PL; PT; RO; RS; SI; ES; SE; TR; UK

Résumé des résultats (Abstract) (Anglais)

See short description

Références bases de données (Anglais)

Swiss Database: COST-DB of the State Secretariat for Education and Research Hallwylstrasse 4 CH-3003 Berne, Switzerland Tel. [phone] Swiss Project-Number: C15.0110