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A polymer, here labeled PDDA, clings to a carbon nanotube of opposite charge, and an enzyme, GOX, does the same with the polymer. The steps can be repeated to build up a biosensor's layers, enzyme count and sensitivity.

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Document Title: Rules of Attraction
Category: EMSL (William R. Wiley Environmental Molecular Sciences Laboratory)
Media Type: Photos
Date of Image/Photo: April 2006
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URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/AMER-6P,NN4

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