Regensburg 2010 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Crystallization and Self Assembly

CPP 13.9: Poster

Monday, March 22, 2010, 16:30–18:00, Poster C

Fabrication and Characterization of Two Dimensional Ordered Arrays of Mesoscopic Latex Particles on Solid Surfaces — •Züleyha Yenice and Regine v. Klitzing — Stranski-Laboratorium für Physikalische und Theoretische Chemie - Institut für Chemie TU Berlin, Sekr. TC 9 Strasse des 17. Juni 124 D-10623 Berlin

Textured surfaces of controlled morphology and periodicity are of great significance for many areas of science and technology.

The aim of the present work is to control the distance between particles in a 2D lattice. The deposition of the particles on to the wafer is accruing by spin coating technique [1]. Here the effect of the particle size, different rotational speed, type of solvent and different concentrations of the latex particles in the suspension were examined. For morphological observation an atomic force microscope (AFM) operating in the tapping mode was used.

It was observed that different ionic strengths of the solvent leads to different structures on the surface, the distances between deposited particles decrease with increasing ionic strength. This phenomenon can be explained by the classical DLVO model theory. It was also observed that the viscosity and the evaporation rate of the solvent effects the structure on the surface. However, there is a lack of information about the preparation of high ordered colloidal arrays with the interparticle distance ranging from 10 nm to 100 nm.

[1] P. Jiang, M. J. McFarland. J. Am Chem. Soc. 2004,126, 13778-13786