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CPP: Chemische Physik und Polymerphysik

CPP 20: POSTER A

CPP 20.46: Poster

Monday, March 24, 2003, 19:00–21:00, ZEU/250

How to cover CdSe/ZnS quantum dots with a well defined silica shell — •Holger Reiber¹, José Marqués Hueso¹, Hans Joachim Schöpe¹, Thomas Palberg¹, Christina Graf², Alfons van Blaaderen², Jolanta Bohnenberger³, Alf Mews³, and Thomas Basché³ — ¹Institut für Physik der Universität Mainz, Staudingerweg 7, D-55099 Mainz — ²Ornstein Lab., Universiteit Utrecht, Princetonplein 1, NL-3584 CC Utrecht, The Netherlands — ³Institut für Physikalische Chemie der Universität Mainz, Welderweg 11, D-55099 Mainz

Quantum dots are interesting in a wide field of biophysical and photonical applications. Here we examine possibilities of array formation of fluorescent II/VI-semiconductor-nano-particles. In particular we describe a procedure to cover the particles with a spherical shell of silica, transparent to visible light. We employ a two step recipe in which the particles are first functionalised and then submitted to conventional Stö ber-growth. We were able to grow these core-shell-particles to well defined sizes, corresponding to the fluorescence wavelength. Particles are then arrayed by advanced film formation technique. Performance and possible applications will be discussed.