Formation of luminescent spherical core-shell particles by the consecutiveadsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids

Functional core-shell particles were prepared by assembling a composite mul tilayer shell of charged polyelectrolytes and luminescent CdTe(S) nanocryst als (cadmium telluride with a certain content of sulfide) via their consecu tive electrostatic adsorption from solution onto micron-sized latex particl es. The formation of the composite shell has been confirmed by optical spec troscopy, confocal microscopy and high-resolution transmission electron mic roscopy. Variation of the size and surface chemistry of the semiconductor n anoparticles, the size and shape of the colloid templates, and the nature o f the polyelectrolyte opens new avenues for the production of a variety of novel core-shell materials. (C) 2000 Elsevier Science B.V. All rights reser ved.