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American Chemical Society's Weekly PressPac -- Sept. 19, 2007

ide application for rapidly transferring high-resolution images onto large surfaces. But current nanoprinting technology relies on the diffusion of ink, and cannot reproduce details smaller than one hundred nanometers in diameterabout 400 times smaller than the width of a human hair.

The new technology, termed biocatalytic microcontact printing, involves coating a nano-stamp with an enzyme a protein that speeds up chemical reactions.

The enzyme then digests away a layer on the surface, leaving behind an imprint almost like an old-fashioned rubber stamp. Because no diffusion of ink is involved in the process, the resolution of microcontact printed images is about one hundredfold greater than possible with conventional technology. The technique may point the way toward faster, less expensive methods of nanolithography, which could be used to create complex structures for micromachines, biosensors, and other nanoscale devices, the researchers suggest.

Biocatalytic Microcontact Printing



Eric J. Toone, Ph.D.
Duke University
Durham, NC 27708-0271
Phone: 919-681-3484
Fax: 919-681-5161

Robert L. Clark, Ph.D.
Duke University
Durham, NC 27708-0271
Phone: 919-660-5310
Fax: 919-660-8963


Drug-resistant tuberculosis rise

Contact: Michael Woods
American Chemical Society

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