Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 47: Poster Tuesday: Scanning Probe Techniques

O 47.2: Poster

Dienstag, 2. April 2019, 18:00–20:00, Poster D

Nano-manipulation on the polymer surfaces using functionalized AFM probes — •Tunç Çiftçi1, Laurent Pham Van2, Oleg Kurnosikov1, and Bert Koopmans11Eindhoven University of Technology, Eindhoven, the Netherlands — 2Centre CEA de Saclay, Gif-sur-Yvette, France

We demonstrate a new approach to manipulate various polymer surfaces by an AFM using specifically designed probes. By this new method, the submicrometer protrusions can be formed on the surface in any selected positions. In contrast to the earlier approaches based on deforming thick organic materials by pressing with a probe, we form protrusions without any tip-surface contact. These functionalized probes can generate an instant temperature gradient at the tip while remaining in the non-contact regime close the surface. The high temperature gradient at the tip end can be switched on and off sharply. The organic material is heated up to its melting point quickly and locally pulled up towards to the hot tip by the van der Waals forces. With a sharp drop in the temperature, this fluidic-protrusion solidifies maintaining its shape. To realize this functionality, we implemented a new type of conducting planar probes, which provide high current density close to the tip end for controlling the local temperature. With this design we can manipulate a broad class of organic materials with melting temperature from 20 up to 400 degrees of Celsius. Our approach is also could be challenging for study and selective manipulation of biological systems.

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