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    Single-molecule study on polymer diffusion in a melt state: Effect of chain topology

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    Type
    Article
    Authors
    Habuchi, Satoshi cc
    Fujiwara, Susumu
    Yamamoto, Takuya
    Vácha, Martin
    Tezuka, Yasuyuki
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Bioscience Program
    Single-Molecule Spectroscopy and Microscopy Research Group
    Date
    2013-07-15
    Online Publication Date
    2013-07-15
    Print Publication Date
    2013-08-06
    Permanent link to this record
    http://hdl.handle.net/10754/562897
    
    Metadata
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    Abstract
    We report a new methodology for studying diffusion of individual polymer chains in a melt state, with special emphasis on the effect of chain topology. A perylene diimide fluorophore was incorporated into the linear and cyclic poly(THF)s, and real-time diffusion behavior of individual chains in a melt of linear poly(THF) was measured by means of a single-molecule fluorescence imaging technique. The combination of mean squared displacement (MSD) and cumulative distribution function (CDF) analysis demonstrated the broad distribution of diffusion coefficient of both the linear and cyclic polymer chains in the melt state. This indicates the presence of spatiotemporal heterogeneity of the polymer diffusion which occurs at much larger time and length scales than those expected from the current polymer physics theory. We further demonstrated that the cyclic chains showed marginally slower diffusion in comparison with the linear counterparts, to suggest the effective suppression of the translocation through the threading-entanglement with the linear matrix chains. This coincides with the higher activation energy for the diffusion of the cyclic chains than of the linear chains. These results suggest that the single-molecule imaging technique provides a powerful tool to analyze complicated polymer dynamics and contributes to the molecular level understanding of the chain interaction. © 2013 American Chemical Society.
    Sponsors
    This work was supported by a Grant-in-Aid for Scientific Research Grant No. 22750122 (S.H.), Grant No. 20340109 (M.V.), Grant No. 23685022 (T.Y.), Grant No. 23106709 (T.Y.), and Grant No. 23350050 (Y.T) of the Japan Society for the Promotion of Science. S.H. is grateful for the Kurata Grant.
    Publisher
    American Chemical Society (ACS)
    Journal
    Analytical Chemistry
    DOI
    10.1021/ac401272a
    PubMed ID
    23815574
    ae974a485f413a2113503eed53cd6c53
    10.1021/ac401272a
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Bioscience Program

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