Preparation of primary amine-modified gold nanoparticles and their transfection ability into cultivated cellsElectronic Supplementary Information (ESI) available: A TEM image of the complex at a w/w ratio of 11. See http://www.rsc.org/suppdata/cc/b4/b406189f/

Cationic gold nanoparticles, prepared by reducing HAuCl(4) with NaBH(4) in the presence of 2-aminoethanethiol, formed a complex with plasmid DNA, and could be transfected into cultivated cells.