AVS 49th International Symposium
    Nanometer Structures Monday Sessions
       Session NS+BI-MoA

Paper NS+BI-MoA8
Q-dots Patterned Surfaces for Cell Adhesion

Monday, November 4, 2002, 4:20 pm, Room C-207

Session: Nanobiology
Presenter: J.P. Spatz, University of Heidelberg, Germany
Authors: A. Szucs, University of Heidelberg, Germany
J.P. Spatz, University of Heidelberg, Germany
Correspondent: Click to Email
Highly luminescent semiconductor quantum nanodots (Q-dots) regularly patterned on different substrates, were synthesized and applied as binding sites for single cell receptors in order to study cell adhesion. CdS, CdSe and CdTe/ Q-dots in the size range of 2-8 nm in diameter were generated in Poly (styrene-b-2-vinyl-pyridine) (PS-P2VP)/inorganic hybrid reverse micellar system (RM). Solid Cd salts loaded polymer cores, constructed by the 2-vinyl-pyridine, were used as nanocompartments for preparation of uniform semiconductor nanoparticles. Particle size could be controlled by varying the diameter of the RM core, via the length of the core constructing polymer, and by changing the precursor salt loading in the polymer core. Different kinetics and structures were observed inside the RM core during the particle formation by using different precursor salts (Cd(ClO4)2, Cd(OAc)2). Photo luminescent properties of semiconductor nanoparticles were investigated by different methods (UV-VIS spectrophotometry, steady-state fluorescence, color luminescence imaging). "In situ" surface patterning on different substrates (Glass, Si-wafer etc.) by self-organization of the diblock copolymer micelles on the surfaces was monitored by AFM measurements.