Tough Supersoft Sponge Fibers with Tunable Stiffness from a DNA Self-Assembly Technique (pages 5116–5120)
Chang Kee Lee, Su Ryon Shin, Ji Young Mun, Sung-Sik Han, Insuk So, Ju-Hong Jeon, Tong Mook Kang, Sun I. Kim, Philip G Whitten, Gordon G. Wallace, Geoffrey M. Spinks and Seon Jeong Kim
Article first published online: 4 MAR 2009 | DOI: 10.1002/anie.200804788
Tough and soft: Highly porous, spongelike materials self-assemble by calcium ion condensation of DNA-wrapped carbon nanotubes (SWNTs–DNA; see picture, IL=ionic liquid). The toughness, modulus, and swellability of the electrically conductive sponges can be tuned by controlling the density and strength of interfiber junctions. The sponges have compliances similar to the softest natural tissue, while robust interfiber junctions give high toughness.