PHYS SEMINAR:Seeing beyond the surfaces with scanning probe microscopes03-05-2021
Speaker: Oğuzhan Gürlü
Title: Seeing beyond the surfaces with scanning probe microscopes
Date/Time: 5 May 2021 / 15:40 - 16:30
Abstract: Scanning probe microscopes are probably the fastest evolving experimental tools. They not only provide structural information at surfaces, but they can also be used as nano scale spectroscopy tools. So far, the application of scanning probes was mostly confined to the surfaces of materials. In this talk I will introduce the capacity of Scanning Tunnelling Microscopy and Atomic Force Microscopy for investigating the sub surface. I will first discuss the photon emission scanning tunnelling microscopy and its applicability in studying the Graphene/Copper interfaces. The influence of the interface state on the photon emission properties will be discussed. On another topic, the use of lateral force microscopy (LFM) in the identification of the whereabouts of impurities forming during the CVD growth of graphene will be presented. Finally, the importance of the subsurface on the tribological properties of surfaces will be exemplified by use of swift heavy ion induced defects on/under HOPG surfaces and the data attained on the sub-surface by friction force microscopy will be shown.
Bio: Oguzhan Gurlu got his MSc (2000) and an awarded PhD (Met Lof, 2004) from University of Twente, the Netherlands, on experimental condensed matter physics. Between 2004 and 2007, he was a postdoctoral research assistant at the Max Planck Institute for Solid State Research, Nanoscale Science Department (Kern Group), Stuttgart, Germany. Oguzhan returned to Turkey, to Istanbul Technical University Physics Department, which is his current institute. In the meantime, he had assumed visiting positions at Max Planck Institute for Solid State Research, and ETH Zurich. Since 2019, he is also affiliated with the Quantum Metrology Laboratory of Tubitak. He has been a recipient of NATO A1 fellowship and Tubitak GEBIP Award given to promising young scientists. His main research topic is Scanning Tunnelling Microscopy and associated applications.