Web Release Date: October 3,
Correlating Dynamics and Selectivity in Adsorption of Semiconductor Nanocrystals onto a Self-Organized Pattern
and
Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149 Münster, Germany, Center for Nanotechnology (CeNTech), Gievenbeckweg 11, 48149 Münster, Germany, Physics Department and Center of Nanoscience (CeNS), Ludwig-Maximilians-Universität München, 80799 München, Germany, and The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720
Received August 16, 2007
Revised September 19, 2007
Abstract:
Selective adsorption of semiconductor nanocrystals onto an organic self-organized pattern shows a time-dependent behavior. By studying the wetting behavior of delivered solvent (1-phenyloctane) on a lipid self-organized pattern and determining the adhesion energy between semiconductor nanocrystals and substrate, we obtain a correlation between dynamics and selectivity in adsorption of semiconductor nanocrystals onto the pattern by constructing a potential energy landscape. Two consecutive steps for selective adsorption of nanocrystals onto the self-organized pattern have been established: the first one is the molecule exchange of 1-phenyloctane and lipid molecules to form the adsorption sites for nanocrystals, and the second one is the adsorption of nanocrystals onto the adsorption sites due to the strong interaction between nanocrystals and substrate.
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