Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 76: Organic, Polymeric, Biomolecular Films - also with Adsorbates

O 76.6: Vortrag

Donnerstag, 28. Februar 2008, 16:30–16:45, MA 043

Discrete laser patterning of phospholipid multilayers — •Mareike Mathieu, Daniel Schunk, Steffen Franzka, Christian Mayer, Eckart Hasselbrink, and Nils Hartmann — Fachbereich Chemie and Center for Nanointegration Duisburg-Essen (CeNIDE), Universität Duisburg-Essen (UDE), 45141 Essen, Germany

Phospholipid bilayers are widely recognized as model systems for biological membranes. Phospholipid multilayers also have been used as a matrix to arrange metallic nanoparticles into 2D structures [1]. Here we report on a photothermal procedure to pattern such phospholipid bilayer stacks. For patterning dioleyl-phosphatidic acid (DOPA) films were deposited on native silicon samples using the spin coating technique. Irradiation with a focused beam from an argon ion laser operated at a wavelength of 514 nm allows to locally remove the coating [2]. At a spot diameter of about 2.5 microns structures with lateral dimensions down to 400 nm were prepared. Most remarkably, however, partial removal can be carried out at incremental steps leaving a distinct number of bilayers behind. This offers an opportunity to build up discrete topographies, which could be used as 3D templates for the fabrication of multilevel architectures of nanoscopic components.

1. A. Terheiden, C. Mayer, K. Moh, B. Stahlmecke, S. Stappert, M. Acet, B. Rellinghaus, Appl. Phys. Lett. 84 (2004) 3891.

2. T. Balgar, S. Franzka, N. Hartmann, Appl. Phys. A 82 (2006) 689.