Regensburg 2004 – wissenschaftliches Programm

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SYNP: Functional Nanoparticles

SYNP 2: Functional Nanoparticles - II

SYNP 2.2: Hauptvortrag

Dienstag, 9. März 2004, 12:00–12:30, H1

Nanoscale Ferroelectrics — •Marin Alexe — Max-Planck Institute of Microstructure Physics, D-06120 Halle, Germany

Nanotechnology is expected soon to have a big impact on most of our life. Sustained effort will be necessary to transform the nowadays dreams into reality, and the only way to do it is to acquire a good knowledge on phenomena at nanoscale. The science of atoms and molecules, on one end, and the science of matter from microstructure to larger scale, on the other, are generally established. The remaining size spectrum, roughly from 1 nm to 100 nm, represents the nanoscale at which properties of materials are clearly size dependent and can be engineered or tailored. Among all materials, functional materials are expected to play an important role in the establishing of nanotechnology. Moreover, among nanoscale functional materials ferroelectrics are expected to have a major involvement in fields such as sensors and actuators, memory devices, and optics.

The present lecture will give the last achievements in the nanofabrication of ferroelectric materials with both top-down and bottom-up approaches. Preparation and characterization of ultrathin films, nano-rods and -tubes, and nanostructures will be presented. Special emphasis will be put on nanoscale ferroelectric crystals fabricated by self-pattering and nano-shell ferroelectric tubes fabricated using template-mediated methods.