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Real-Time Analysis of Enzymatic Surface-Initiated Polymerization Using Surface Plasmon Resonance (SPR)

✍ Scribed by Young-Rok Kim; Hyun-jong Paik; Christopher K. Ober; Geoffrey W. Coates; Sonny S. Mark; Thomas E. Ryan; Carl A. Batt

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
238 KB
Volume
6
Category
Article
ISSN
1616-5187

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✦ Synopsis

Abstract

Summary: The kinetics of enzymatic surface‐initiated polymerization of PHB on gold surface has been examined by SPR and the resultant polymer layers characterized by AFM and FT‐IR spectrometry. The immobilized enzyme catalyzed surface‐initiated polymerization of 3HB‐CoA, resulting in the formation of a polymer brush on the surface. The rate of polymer growth from the surface was monitored by SPR in real‐time. Polymer growth as measured by the increase in the resonance angle showed no apparent lag phase during the polymerization reaction. SPR analysis also revealed that the thickness of the polymer film could be controlled by varying the initial enzyme density on the surface. The average thicknesses of the PHB film after polymerization reaction were 95, 45 and 15 nm for the surfaces that were treated with 0.5, 0.3 and 0.1*10^−6^ M of enzyme, respectively.

The binding of PHA synthase at different concentration to the mixed SAMs and subsequent polymerization.

magnified imageThe binding of PHA synthase at different concentration to the mixed SAMs and subsequent polymerization.

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