Regensburg 2004 – wissenschaftliches Programm

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SYOH: Organic and Hybrid Systems for Future Electronics

SYOH 5: Poster

SYOH 5.2: Poster

Donnerstag, 11. März 2004, 18:00–21:00, B

Template guided self-assembly of nanoclusters — •Li Zhang, Lifeng Chi, and Harald Fuchs — Physikalisches Institut, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany

Surface patterning with microscopically small structures has attracted increasing scientific and technological interest over the past decade. In our work, variable surface patterns of chiral molecule C11-CO-(L)-Cys-(L)-Cys-NH-C18 are obtained by changing the subphase conditions. At the air- water (pure) interface, it forms a kind of chiral pattern. Due to the potential complex ability of the sulfur atom in the molecule, this kind of surface aggregate could be used as a template to trap the metal ions or nanoparticles during its interfacial assembly process, which may provide a method to assemble the metal or semi-conductor particles into a designed way.

Using the metal ions as subphase, the chiral pattern size is smaller compared with the result without metal ions. The size of this kind of aggregate decreases with increased concentration of metal ions. For the subtle structure inside the circle domain, the stripe like structure is found. At the air-CdTe nanoparticle aqueous interface, a kind of branched nanostripes appears. The furcation point appears at the end of some branches. The preliminary results of SEM and confocal fluorescence microscopy show that the nanoparticle are trapped in the nanowires during the process of interfacial assembly.