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In this study, single-stranded DNA is employed as a model polymer to investigate the effect of polyelectrolyte coatings on colloid stability. By use of homologous series of negatively charged DNA homopolymers ranging in size from monomers to molecules 1400 nucleotides in length (MW = 330 to 460,000, respectively), it was found that there is a critical polymer length (CPL) required for the stabilization...
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