Tapping-mode AFM study of tip-induced polymer deformation under geometrical confinement

Hong Zhang, Yukio Honda, Shinji Takeoka

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    The morphological stability of polymer films is critically important to their application as functional materials. The deformation of polymer surfaces on the nanoscale may be significantly influenced by geometrical confinement. Herein, we constructed a mechanically heterogeneous polymer surface by phase separation in a thin polymer film and investigated the deformation behavior of its nanostructure (∼30 nm thickness and ∼100 nm average diameter) with tapping-mode atomic force microscopy. By changing different scan parameters, we could induce deformation localized to the nanostructure in a controllable manner. A quantity called the deformation index is defined and shown to be correlated to energy dissipation by tip-sample interaction. We clarified that the plastic deformation of a polymer on the nanoscale is energy-dependent and is related to the glass-to-rubber transition. The mobility of polymer chains beneath the tapping tip is enhanced, and in the corresponding region a rubberlike deformation with the lateral motion of the tip is performed. The method we developed can provide insight into the geometrical confinement effects on polymer behavior.

    Original languageEnglish
    Pages (from-to)1333-1339
    Number of pages7
    JournalLangmuir
    Volume29
    Issue number5
    DOIs
    Publication statusPublished - 2013 Feb 5

    Fingerprint

    Polymers
    atomic force microscopy
    polymers
    Polymer films
    Nanostructures
    Functional materials
    Rubber
    Phase separation
    Atomic force microscopy
    Plastic deformation
    Energy dissipation
    rubber
    plastic deformation
    Glass
    Thin films
    energy dissipation
    glass
    interactions
    energy

    ASJC Scopus subject areas

    • Electrochemistry
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Materials Science(all)
    • Spectroscopy

    Cite this

    Tapping-mode AFM study of tip-induced polymer deformation under geometrical confinement. / Zhang, Hong; Honda, Yukio; Takeoka, Shinji.

    In: Langmuir, Vol. 29, No. 5, 05.02.2013, p. 1333-1339.

    Research output: Contribution to journalArticle

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