Direct visualization of cooperative adsorption of a string-like molecule onto a solid

DOI IR (HANDLE) Web Site PubMed 1 Citations 51 References Open Access
  • Morimitsu, Yuma
    Department of Applied Chemistry, Kyushu University
  • Matsuno, Hisao
    Department of Applied Chemistry, Kyushu University Center for Polymer Interface and Molecular Adhesion Science, Kyushu University
  • Oda, Yukari
    Division of Applied Chemistry and Biochemical Engineering, Shizuoka University
  • Yamamoto, Satoru
    Center for Polymer Interface and Molecular Adhesion Science, Kyushu University
  • Tanaka, Keiji
    Department of Applied Chemistry, Kyushu University Center for Polymer Interface and Molecular Adhesion Science, Kyushu University

Description

Natural systems, composite materials, and thin-film devices adsorb macromolecules in different phases onto their surfaces. In general, polymer chains form interfacial layers where their aggregation states and thermal molecular motions differ from the bulk. Here, we visualize well-defined double-stranded DNAs (dsDNAs) using atomic force microscopy and molecular dynamics simulations to clarify the adsorption mechanism of polymer chains onto solid surfaces. Initially, short and long dsDNAs are individually and cooperatively adsorbed, respectively. Cooperative adsorption involves intertwining of multiple chains. The dependence of adsorption on the chain affects the formation of the interfacial layer, realizing different mechanical properties of DNA/filler bulk composites. These findings will contribute to the development of light and durable polymer composites and films for various industrial, biomedical, and environmental applications.

Journal

  • Science Advances

    Science Advances 8 (41), 2022-10-12

    American Association for the Advancement of Science (AAAS)

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