“Fatal Adsorption” of Brushlike Macromolecules:  High Sensitivity of C−C Bond Cleavage Rates to Substrate Surface Energy

Adsorption-induced degradation of brushlike macromolecules was monitored through molecular imaging by atomic force microscopy. The rate constant for C−C bond cleavage was shown to be extremely sensitive to the substrate surface energy. A few percent increase in the surface energy from 69.2 to 71.2 m...

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Published inJournal of the American Chemical Society Vol. 130; no. 13; pp. 4228 - 4229
Main Authors Lebedeva, Natalia V, Sun, Frank C, Lee, Hyung-il, Matyjaszewski, Krzysztof, Sheiko, Sergei S
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 02.04.2008
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Summary:Adsorption-induced degradation of brushlike macromolecules was monitored through molecular imaging by atomic force microscopy. The rate constant for C−C bond cleavage was shown to be extremely sensitive to the substrate surface energy. A few percent increase in the surface energy from 69.2 to 71.2 mN/m led to an order of magnitude increase of the scission rate. The absolute values of the rupture forces ranging from 2.57 to 2.47 nN are in agreement with previously calculated and measured values for stretching surface-tethered molecules.
Bibliography:ark:/67375/TPS-BZS1ZRB7-X
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SourceType-Scholarly Journals-1
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content type line 23
ISSN:0002-7863
1520-5126
DOI:10.1021/ja7111806