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Reorganization of Nanopatterned Polymer Brushes by the AFM Measurement Process

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    Reorganization of Nanopatterned Polymer Brushes by the AFM Measurement Process
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    Physical Chemistry 1, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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    Macromolecules

    Cite this: Macromolecules 2006, 39, 13, 4540–4546
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    https://doi.org/10.1021/ma0606410
    Published May 17, 2006
    Copyright © 2006 American Chemical Society
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    Abstract

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    The interaction between a nanopatterned polymer brush and a rigid pyramidal body representing an AFM tip has been investigated using molecular dynamics (MD) simulation. The computed forces for varying position and penetration depth are systematically contrasted with the density and pressure tensor profiles of the unperturbed brush. For weak penetration of the AFM tip in the brush, we find that the force can quantitatively be computed from the properties of the unperturbed brush after folding with the geometry of the AFM tip. This steric effect leads to a force profile that is significantly wider than the physical brush. The structure of the perturbed brush has also been examined, and we show that for deep penetration of the AFM tip more than half of the force originates from the reorganization of the brush.

    Copyright © 2006 American Chemical Society

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    Macromolecules

    Cite this: Macromolecules 2006, 39, 13, 4540–4546
    Click to copy citationCitation copied!
    https://doi.org/10.1021/ma0606410
    Published May 17, 2006
    Copyright © 2006 American Chemical Society
    Request reuse permissions

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