Ring and Disk-Like CdSe Nanoparticles Stabilized with Copolymers

CdSe nanoparticles stabilized with the amphiphilic diblock copolymer polystyrene-block-poly(4-vinylpyridine) were spread from toluene dispersion on the water surface. Monolayers could be transferred onto solid substrates using the Langmuir-Blodgett technique. By means of atomic force and scanning electron microscopy highly symmetric ring and disk-like structures with diameters ranging between 150 nm and 1200 nm were observed. <GRAPHIC NAME="gra001" COPYRIGHT="WILEY-VCH Verlag GmbH" ERIGHTS="1" LOC="FIXED"> <CAPTION> AFM image of a mixed monolayer of copolymer 12 and CdSe nanoparticles stabilized with polystyrene-block-poly(4-vinylpyridine). </CAPTION> </GRAPHIC>