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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: POSTERS Polyelectrolytes and Biological Systems

CPP 16.12: Poster

Dienstag, 24. März 2009, 14:00–16:30, P3

The Nanostructure of the Tracheid Wood Cell Wall — •Malte Ogurreck^1,2, Pekka Saranpää³, Manfred Burghammer⁴, Sebastian Schoeder⁴, Christina Krywka¹, Wiebke Knoll¹, and Martin Müller² — ¹IEAP, University Kiel — ²GKSS, Geesthacht — ³METLA, Vantaa (Finland) — ⁴ESRF, Grenoble (France)

Tracheid wood cell walls are mainly composed of cellulose nanocrystals (microfibrils) embedded in an amorphous matrix. These microfibrils are helically wound around the cell axis and are arranged in several layers.

While the structure of tracheid wood cells has been a research topic for many decades now and the structure on the biological and molecular level are well known, the detailed structure on intermediate length scales is still largely unknown. Here, we present results of a nanodiffraction experiment carried out at the microfocus beamline ID13, ESRF.

Tracheid cross sections have been scanned with a position resolution of 200 nm. A novel mathematical description of the scattering geometry for tracheid wood cells allows for the calculation of the crystal orientation from the scattering data. Thus, it is possible to determine the cellulose crystal orientation on a length scale of 200 nm and refine tracheid cell wall models.