Silver Nanocrystals Oriented by DNA Templates

摘要

@@The ability to control the geometries (e.g., shape, size, interdistance, and arrangement) of noble metals nanomaterials, especially silver, has increasingly attracted the attention of scientists in the fields of catalysis, electronics, photonics, information storage, optoelectronics, biological labeling, etc. In recent years, a number of Ag nanowires have been widely synthesized by using DNA as the template because of its self-assembly and mechanical properties, as well as the high affinity between DNA bases with Ag+ cations. For instance, Jeffry[1] produced Ag nanoclusters encapsulated by short oligonucleotides. Shemer[2] reported silver nanoparticles grown on a chiral template including 700 base pairs double stranded scaffold. Berti[3] modulated the size of CdS nanoparticles by templating their formation with oligo(guanine)n oligomers where n varied from 5 to 20. Ihara[4] found silver ion unusually stabilizes the structure of a parallel-motif DNA triplex using Hoogsteen base-pairing.