Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 15: P1: Interfaces and Thin Films

CPP 15.6: Poster

Montag, 16. März 2015, 16:00–19:00, Poster A

Simultaneous Mapping of Long-Range Attractive Forces and Near-Surface Interaction Forces with Multi-Set point Intermittent Contact (MUSIC) Mode AFM — •Diana Voigt, Eike-Christian Spitzner, and Robert Magerle — Technische Universität Chemnitz, Chemnitz, Germany

Studies using intermittent contact (IC) mode atomic force microscopy (AFM) often focus on imaging the surface morphology and on understanding contrast formation due to the mechanical response of the specimen. Here we study the contribution of long-range interactions, such as electrostatic and van der Waals interactions, as well as local differences in hydrophobicity using MUSIC mode AFM. Substrates partially covered with self-assembled monolayers either with carbon or amine terminated tail groups are studied. This mimics protein surfaces with locally different degrees of hydrophobicity. We aim at a detailed understanding of long-range and near-surface tip-sample interactions under different conditions. A methodological point of interest is the question about the ability to measure the different interactions in one single-pass measurement using MUSIC mode AFM.