COLL 120 |
| Antoine Pallandre1, Alain Moussa2, Jérôme Plain1, Bernard Nysten1, and Alain M. Jonas1. (1) Department of Materials Science, Université Catholique de Louvain, POLY AND CERMIN, Place Croix du Sud, 1, Louvain-la-Neuve, 1348, Belgium, (2) Deptarment of Materials Science, Université Catholique de Louvain, POLY AND CERMIN, Place Croix du Sud,1, Louvain-la-Neuve, B-1348, Belgium |
| Controlling the structure of organic materials at the nanoscale is highly desirable to design efficient functional devices. One possible way to achieve nanoscale control of organic systems is to make use of templating strategies, allowing to process at once a large number of organic elements. One such strategy consists in creating chemical templates by drawing nanoscale patterns on flat surfaces, then to use this modulated 2D field to direct and control the assembly of functional macromolecules on the surface. In this context, we are currently studying surface-directed macromolecular templated assembly at the nanoscale, starting from 2D templates (patterns down to 20 nm) produced by combining electron beam nanolithography with surface chemistry. Gas-phase silanation of silicon wafers through the nanolithographied holes of an electron-sensitive resist is used to produce nanopatterns, with a wide range of chemical functionalities easily available. The quality of the silanation process is checked by AFM, X-ray reflectometry, contact angle measurements and XPS. We present the fabrication method of the templates and their use to control local deposition of macromolecules. As templating process, we concentrate on polymerization on the nanopatterns, which allows to graft macromolecular brushes (down to 40 nm dot size), or on layer-by-layer (LbL) deposition of polyelectrolytes of opposite charge to grow functional multilayers. |
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Nanoscience and Nanotechnology
8:30 AM-11:45 AM, Monday, March 29, 2004 Marriott -- Grand Ballroom J, Oral
Division of Colloid and Surface Chemistry |