Berlin 2008 – scientific programme
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BP: Fachverband Biologische Physik
BP 26: Posters II
BP 26.11: Poster
Thursday, February 28, 2008, 17:00–19:30, Poster A
Nanotomography of Biomaterials — •Stephanie Röper1, Christian Zeitz2, Christian Dietz1, Nadine Drechsel1, Anke Bernstein3, Nicolaus Rehse1, and Robert Magerle1 — 1Chemische Physik, TU Chemnitz, D-09107 Chemnitz — 2Experimentalphysik, Universität des Saarlandes, D-66123 Saarbrücken — 3Experimentelle Orthopädie, Martin-Luther-Universität Halle-Wittenberg, D-06097 Halle/Saale
Biomaterials such as bone and teeth are nanocomposites of proteins and minerals. At the molecular length scale these materials have a stiff inorganic component (hydroxylapatite) that reinforces the soft organic matrix (type I collagen) through a recurring structural motif. To gather information of the nanometer scaled structure of these materials we use nanotomography. For this scanning probe microscopy (SPM) based method the specimen is ablated layer-by-layer by wet chemical etching and imaged with tapping mode SPM after each etching step. In our experiments we focus on cortical human bone (embedded and native) and human teeth. The stepwise etching is done in-situ in the SPM with an automated setup. We will present our latest volume images of human bone and teeth and discuss new concepts for adjusting the imaging parameters to maintain a good imaging quality.