Sterically Mediated Two‐Dimensional Architectures in Aggregates of Au Nanoparticles Directed by Phosphorothioate Oligonucleotide‐DNA

Abstract

Sterically mediated aggregation of gold nanoparticles: 13 nm gold nanoparticles can be arranged in a hexagonal, square, trigonal, or linear manner (see Figure) in two-dimensional (2D) aggregates linked by phosphorothioate oligo-DNA (PS oligo-DNA) of different lengths. The steric effect induced by the parallel orientation of the PS oligo-DNA helix on the particle surface is identified to be of vital importance in controlling the 2D architecture of the particles in the aggregates. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2005/c2004_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.