Regensburg 2007 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 11: INTERNAL SYMPOSIUM Scattering Experiments II
CPP 11.11: Vortrag
Dienstag, 27. März 2007, 17:45–18:00, H37
Micro-focus GISAXS Investigations of Microcantlever Sensors — •Jochen S. Gutmann1,2, Yajun Cheng1, Mine Memesa1, Sebastian Nett1, and Rüdiger Berger1 — 1Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany — 2Institute for Physical Chemistry, Johannes Gutenberg University Mainz, Welderweg 11, D-55099 Mainz
Microcantlever sensors (MC) are a versatile class of sensors, with the potential for a high spatial integration of very different analyte sensitivity into a single sensor unit. Polymeric coatings on MC sensors allow for a facile variation in analyte detection due the ease of functional chemical modification of the polymer layer. While homopolmyer coatings are easily applied to the MC surface, polymer brushes extend the use of MC sensor technology into liquid environments. [1,2] In order to investigate the lateral structures of the polymer layers on the µm sized cantilevers, we used a micro-focus set-up for X-ray scattering under grazing incidence (µ-GISAXS), at the BW4 beam line of the HASYLAB. [3] The structural information obtained from the grazing incidence scattering experiments is then used to separate the mechanical sensing response of the MC sensor to its changes in structure and surface energy.
[1] Bumbu G.-G., Kircher G., Wolkenhauer M., Berger R., Gutmann J.S., Macromol. Chem. Phys. 2004, 205 (13): 1713-1720 [2] J. Zhao, R. Berger, J. S. Gutmann, Applied Physics Letters, 89, 033110 (2006). [3] M. Wolkenhauer, G.-G. Bumbu, Y. Cheng, S. V. Roth, J. S. Gutmann, Applied Physics Letters, 89, 054101 (2006).