Dresden 2006 – wissenschaftliches Programm

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O: Oberflächenphysik

O 29: Poster session II (Nanostructures, Magnetism, Particles and clusters, Scanning probe techniques, Time-resolved spectroscopy, Structure and dynamics, Semiconductor surfaces and interfaces, Oxides and insulators, Solid-liquid interfaces)

O 29.9: Poster

Mittwoch, 29. März 2006, 14:30–17:30, P2

Fabrication of Gold Nanoparticles using Nanosphere Lithography in Combination with Laser Tailoring — •Rodica Morarescu, Frank Hubenthal, and Frank Träger — Institut für Physik and Center for Interdisciplinary Nanostructure Science and Technology- CINSaT, Universität Kassel, Heinrich-Plett Strasse 40

In order to overcome the classical limits of silicon technology the use of molecular circuits is a challenging new possibility. The idea behind this is to use molecular wires as active elements,thus reducing circuit dimensions to the molecular scale. As a possible approach to realize such structures, we describe exploratory experiments for the preparation of regular arrays of metal nanoparticles by nanosphere lithography (NSL) and their exploitation as anchor points for the formation of uni- and bi-directional molecular nanowires with a high degree of lateral orientation. Depending on the molecular species and length of the nanowires to be oriented on a substrate surface, the distance between the metal nanoparticles as well as their size and shape have to be chosen independently. For these purpose we apply nanosphere lithography in combination with laser based tailoring of the dimensions of the nanoparticles. In the past we have already achieved laser manipulation of the size and shape of gold and silver nanoparticles. Here we have further produced hexagonally close packed monolayers of latex spheres by the tilt coating method, gold atoms being deposited using electron beam evaporation under ultra high vacuum conditions. An array of triangularly shaped gold nanoparticles remains on the substrate, after the mask is removed. Subsequently, the interparticle spacing and particle shape are varied by laser tailoring.