Vortrag: Self organised ripple patterns by ion erosion - experiment, theory and application, 16.06.2009, 16:00 Uhr

16 Jun 2009 by in Studium

Im Rahmen des Institutsseminars am Institut für allgemeine Physik hält Adrian Keller vom Institute of Ion Beam Physics and Materials Redearch, Forschungszentrum Dresden/Rossendorf einen Vortrag zum Thema "Self-organized ripple patterns by ion erosion – experiment, theory and application".
Dieser Vortrag findet am Dienstag, 16.6.2009 um 16:00 Uhr statt. Und zwar im Seminarraum 134A, Turm B (gelber Bereich), 5. Stock.


It is well known that oblique low and medium energy (typically 0.1 – 100 keV) ion erosion of solid surfaces can lead to
the formation of periodic ripple patterns with wavelengths ranging from 10 to 1000 nm. These ripple structures have
been found on a large variety of materials, including semiconductors, metals, and insulators. The formation and early
evolution of the ripple patterns can be described by a linear continuum equation derived by Bradley and Harper. At
longer times, however, nonlinear terms have to be taken into account, leading to nonlinear models based on the
Kuramoto-Sivashinsky equation.
This talk will provide an overview of ion-induced pattern formation and summarize the theoretical basics. Recent
experimental results on the evolution of nanoscale ripple patterns on silicon surfaces during high-fluence ion
sputtering will be presented and compared to the predictions of different continuum models. In addition, promising
applications of nanorippled substrates as templates in thin film growth will be discussed.

Eine Zusammenfassung ist auch auf der Institutswebseite unter http://www.iap.tuwien.ac.at/www/_media/seminars/current/2009-06-16_a_keller.pdf zu finden.


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Topic revision: r1 - 16 Jun 2009, waliddPHYSIKFHTUFAT

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