Protein unfolding versus β-sheet separation in spider silk nanocrystals

Parvez Alam, Nguyen Van Hieu (Redaktör)

    Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

    15 Citeringar (Scopus)


    In this communication a mechanism for spider silk strain hardening is proposed. Shear failure of β-sheet nanocrystals is the first failure mode that gives rise to the creation of smaller nanocrystals, which are of higher strength and stiffness. β-sheet unfolding requires more energy than nanocrystal separation in a shear mode of failure. As a result, unfolding occurs after the nanocrystals separate in shear. β-sheet unfolding yields a secondary strain hardening effect once the β-sheet conformation is geometrically stable and acts like a unidirectional fibre in a fibre reinforced composite. The mechanism suggested herein is based on molecular dynamics calculations of residual inter-β-sheet separation strengths against residual intra-β-sheet unfolding strengths
    Sidor (från-till)
    TidskriftAdvances in Natural Sciences: Nanoscience and Nanotechnology
    StatusPublicerad - 2014
    MoE-publikationstypA1 Tidskriftsartikel-refererad

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