Accession Number : ADA318385

Title :   Biomimetic Fabrication of Functional Ceramic Composites.

Descriptive Note : Final rept. 1 Jun 92-30 May 96,

Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF CHEMISTRY

Personal Author(s) : Sukenik, C. ; Heuer, A. ; Deguire, M.

PDF Url : ADA318385

Report Date : NOV 1996

Pagination or Media Count : 4

Abstract : Thin films and multilayers of functional ceramics have a number of important applications including dielectrics, magnetic recording media, piezoelectric transducers, and integrated optical devices. Variously functionalized self-assembled monolayers, attached to single-crystal silicon substrates, were used to direct the deposition of thin films of the oxides of titanium, zinc, iron, and zirconium, at low temperatures and ambient pressures. The films were uniform, adherent, and pore-free and were, in many cases, comprised of micro-crystalline oxide particles. The monolayer functionality found to be most generally useful for these purposes included hydroxyl, carboxylate, and sulfonate functionality. In some cases the films contained desirable forms of the oxides that were different than those normally obtained: i.e., the anatase form of titania as opposed to rutile; and the tetragonal form of zirconia as opposed to monoclinic version. The patterning of the oxide films by patterning the underlying monolayer was also demonstrated. This project developed new technologies for the production of functional ceramics by creating templates for their deposition from solution and as such is a first step towards the generalized control of microstructural and crystallographic order by interface design in composite organic/inorganic materials.

Descriptors :   *COMPOSITE MATERIALS, *THIN FILMS, *CERAMIC MATERIALS, OPTICAL EQUIPMENT, LOW TEMPERATURE, INTEGRATED SYSTEMS, PRODUCTION, INTERFACES, DIELECTRICS, FABRICATION, SINGLE CRYSTALS, SUBSTRATES, IRON, DEPOSITION, OXIDES, SILICON, ORGANIC MATERIALS, PRESSURE, TEMPLATES, ZINC, MEDIA, CRYSTALLOGRAPHY, MAGNETIC MATERIALS, ZIRCONIUM OXIDES, INORGANIC MATERIALS, TITANIUM OXIDES, MAGNETIC RECORDING SYSTEMS, RUTILE, PIEZOELECTRIC TRANSDUCERS.

Subject Categories : Ceramics, Refractories and Glass
      Inorganic Chemistry
      Crystallography
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE