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The binding affinity of single stranded DNA (ssDNA) for Au nanoparticles was found to be strongly size dependent. The data clearly indicate that the interaction is not due to a charge screening effect. The smaller particles (5nm) showed the most pronounced effect and inhibited the hybridization of complementary DNA sequences adsorbed on the Au nanoparticle surface. An experimental procedure was subsequently...
A K 2 BSPP (dipotassium bis(p-sulfonatophenyl)phenylphosphane dihydrate)-based method to sort and size refine Au and Pt nanoparticles has been developed. It makes use of K 2 BSPP to impart graduated stability to the nanoparticles in a number of NaCl solutions. The method offers a systematic approach to preparing metal nanoparticles of small diameters and a narrow size distribution...
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