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Berlin 2001 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 18: Poster: Polymer Blends, Heterogeneous Systems, Colloids and Nanoparticles, Interfaces, Polyelectrolytes

CPP 18.19: Poster

Mittwoch, 4. April 2001, 12:30–15:00, AT1

Self-organization in ultrathin films of CdS nanoparticles — •Antje M"oginger1, Chr. Barglik2, C. Heske1, R. Fink1, and E. Umbach11Experimentelle Physik II, Universit"at W"urzburg — 2Institut f"ur Silikatchemie, Universit"at W"urzburg

Semiconductor nanoparticles prepared by a wet chemical route are of particular technological interest because of their low production costs and simple handling. Electrophoresis hast urned out to be a promising routine to prepare well ordered thin films of nanoparticles. As was demonstrated by Solomentsev [1] and Trau [2], small particles can form periodic structures when deposited in an electric field. We demonstrate that this technique can be utilized to prepare one-dimensional structures in the nanometer range using organically stabilized CdS nanoparticles. Using atomic force microscopy (AFM) the influence of different preparation parameters (electric field strength, organic stabilizers of the particles, and substrate) can be demonstrated and will be discussed in detail. (funded within SFB 410, TP C5).

[1] Y. Solomentsev, M. Böhmer et al. Langmuir 13, 6058 (1997)

[2] M. Trau, D.A. Saville, I.A. Aksay, Langmuir 13, 6375 (1997)

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