Chemical Sharpening of Gold Nanorods: The Rod‐to‐Octahedron Transition

Changing faces: The shape of gold nanorods can be finely tuned by controlled growth under sonication in DMF in the presence of poly(vinylpyrrolidone). Reshaping involves the formation of rods with sharp tips and strongly faceted lateral faces, and ultimately leads to perfect, single-crystal octahedrons (see images). Mechanistic considerations indicate a shape-inducing effect of the polymer through different binding interactions for the different faces. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z703259_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.