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American Chemical Society's Weekly PressPac -- Sept. 19, 2007
Date:9/24/2007

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.

Article #4 FOR IMMEDIATE RELEASE
Biocatalytic Microcontact Printing

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Contact:
Eric J. Toone, Ph.D.
Duke University
Durham, NC 27708-0271
Phone: 919-681-3484
Fax: 919-681-5161
Email: eric.toone@duke.edu

Robert L. Clark, Ph.D.
Duke University
Durham, NC 27708-0271
Phone: 919-660-5310
Fax: 919-660-8963
Email: rclark@egr.duke.edu

ARTICLE #5 EMBARGOED FOR 9 A.M., EASTERN TIME, Sept. 24, 2007

Drug-resistant tuberculosis rise
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Contact: Michael Woods
m_woods@acs.org
202-872-4400
American Chemical Society
Source:Eurekalert

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