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Modification Of Thin Molecular Films By Low-Energy Electrons P. Swiderek, W. Michaelis, C. Jäggle Fachbereich 02 Interest in the chemical modification of adsorbates and thin molecular films at surfaces by exposure to low-energy electrons is increasing. This concerns not only the curing of coatings and lithographic techniques such as proximity printing, i.e. exposure of a surface to lowenergy electrons through a mask [1], but also reactions induced by the current under the tip of the scanning tunneling microscope (STM) [2]. Examples have shown that products are sometimes formed with surprising selectivity [3]. On the other hand, the underlying elementary reaction steps are often not well established. This, on the other hand, is essential to achieve reaction control using low-energy electron beams. Therefore, basic mechanistic studies are needed to complement present and to form a foundation for future technical developments. This contribution will present recent work in this direction concerning
the identification of products and reaction sequences and the measurement of
reactive cross sections [4] in thin molecular films exposed to low-energy
electrons. References |
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