Speaker: Taha Yasseri
Ph.D Candidate
Institut für Theoretische Physik
Universität Göttingen,Goettingen, Germany

Title: Self-organized surface nano-patterning by ion-beam sputtering (a Kinetic Monte Carlo simulation)

Local Host : Dr. Saman Moghimi

Time: Sunday, January 3rd, 2:45pm
Location: Department of Physics,
Sharif University of Technology, Tehran

Abstract:
In the last decades, Ion-beam sputtering as a self-organized, bottomup approach for surface nano-patterning is studied and developed enormously. In this method, using a beam of energetic ions in the range of keV, a wide range of patterns in the nano scales on the surface of different type of material are formed. Nano-metric ripples and nano-dots are
the most observed and examined kind of patterns formed on the surface of semiconductors, metals and glass. Recently, ”surfactant Sputtering” as a combination of chemical and ion-beam techniques is introduced and shown to have the capability for efficient manufacturing of metallic nanclusters and nano-wires. Kinetic Monte Carlo (KMC) models as powerful
theoretical tools are being used to explore and explain the capability of ion-beam sputtering in pattern formation. In this talk a short review of the ion-beam sputtering and especially surfactant sputtering is given
in addition to introducing the KMC models and presenting the obtained results and predictions.