Use of block copolymer-stabilized cadmium sulfide quantum dots as novel tracers for laser scanning confocal fluorescence imaging of blend morphology in polystyrene/poly(methyl methacrylate) films.

摘要: This paper describes the first use of polymer-coated quantum dots (QDs) as fluorescent tracers for LSCFM imaging phase morphology in polymer blends. Cadmium sulfide (CdS) QDs stabilized at surface with a PS-b-PAA block copolymer are shown to be well dispersed via their polystyrene (PS) brush layer PS solvent-cast 40/60 (w/w) PS/PMMA The excluded from PMMA phase, providing excellent fluorescence contrast phase-separated presence PS-b-PAA-stabilized does not appear affect blend morphology, since observed morphologies same when percentage within is varied 10 50 wt %. These QD used characterize several aspects blends containing homopolymer either 100 (low molecular weight) or 1250 (high repeat units. In PS(1250)/PMMA blends, percolating distribution droplets ...