Nanoscale technology
Interesting tech developments in nanotech, nanostructured materials, etc.

Ken Novak's Weblog


daily link  Saturday, November 22, 2003


DNA-based nanoassembly: "Braun's team began their manufacturing process by coating a central part of a long DNA molecule with proteins from an E. coli bacterium. Next, graphite nanotubes coated with antibodies were added, which bound onto the protein. After this, a solution of silver ions was added. The ions chemically attach to the phosphate backbone of the DNA, but only where no protein has attached. Aldehyde then reduces the ions to silver metal, forming the foundation of a conducting wire. To complete the device, gold was added. This nucleates on the silver and creates a fully conducting wire. The end result is a carbon nanotube device connected a both ends by a gold and silver wire."  It functions as a transistor.  The entire process is room temperature.  6:52:45 PM  permalink  

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Last update: 11/24/2005; 11:39:00 PM.
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