Dresden 2006 – scientific programme

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O: Oberflächenphysik

O 29: Poster session II (Nanostructures, Magnetism, Particles and clusters, Scanning probe techniques, Time-resolved spectroscopy, Structure and dynamics, Semiconductor surfaces and interfaces, Oxides and insulators, Solid-liquid interfaces)

O 29.40: Poster

Wednesday, March 29, 2006, 14:30–17:30, P2

Digital Pulsed Force Mode in Ambient and Liquid Environment - Indentation of Soft Condensed Matter — •Alexander Gigler, Claudia Gnahm, Michael Holzwarth, Katrin Hübner, and Othmar Marti — Department of Experimental Physics, Ulm University, D-89069 Ulm, Germany

AFM measurements can be conducted in every kind of environment, which makes it very suitable for material science investigations. The Digital Pulsed Force Mode (DPFM) allows the detailed investigation of the elastic and viscoelastic material parameters of samples. Thus, it is also a possible candidate for the determination of the mechanical properties of more difficult and complex structures such as biopolymers or even living cells. In this contribution the capability of the DPFM to investigate very delicate samples is demonstrated.

Due to the high volume of information acquired during the experiments, automated evaluation has been developed recently to allow a thorough physical testing of the sample materials. The possibilities of data evaluation of the force traces collected during these measurements will also be shown.