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MO: Molekülphysik

MO 59: Poster: Experimental Techniques

MO 59.3: Poster

Thursday, March 16, 2006, 16:30–18:30, Labsaal

Highly sensitive absorption contrast imaging with a near-field infrared nanoscope — •Ilona Kopf, Götz Wollny, Jean-Sebastien Samson, Erik Bründermann, and Martina Havenith — Physikalische Chemie II, Ruhr-Universität Bochum

A challenging scientific task is the label-free and non-invasive investigation of molecules with a nanometer scale resolution. Due to the significant absorption lines in the infrared region, the so-called fingerprint region, the combination of sophisticated apertureless near-field scanning optical microscopy with unique infrared laser spectroscopy is a powerful method to revolutionize our understanding of the chemistry of biomembranes and surfaces. Using microcontact printing we could show that a near-field scanning infrared microscope offers a high sensitivity to chemically resolve molecular monolayers: a longstanding goal in SPM. To deepen the understanding of the chemistry of supported biomembranes additional measurements were performed on liposomes and artificial lipid bilayers with a subwavelength resolution of about 20 nm.