Chemie und Prozesstechnik
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Luminescent polymer microbeads are applied in bead-based platforms for biomolecule binding interactions, and the encoding of these beads is important for the realization of optically distinguishable barcodes. While dye- encoded beads often suffer from photobleaching and spectral crosstalk due to the relatively broad dye emission band, quantum dot (QD)-encoded beads absorb in a very broad wavelength range and reveal narrow emission bands, which enables simultaneous excitation of beads stained with differently colored QDs. To address existing limitations of QD encoding, we have explored simple and effective approaches to homogeneously stain polymer particles and identify suitable polymerization reactions and QD surface ligands that tackle these challenges.