Abstract:
:Understanding the dynamics of ring polymers is a particularly challenging yet interesting problem in soft materials. Despite recent progress, a complete understanding of the nonequilibrium behavior of ring polymers has not yet been achieved. In this work, we directly observe the flow dynamics of DNA-based rings in semidilute linear polymer solutions using single molecule techniques. Our results reveal strikingly large conformational fluctuations of rings in extensional flow long after the initial transient stretching process has terminated, which is observed even at extremely low concentrations (0.025 c*) of linear polymers in the background solution. The magnitudes and characteristic timescales of ring conformational fluctuations are determined as functions of flow strength and polymer concentration. Our results suggest that ring conformational fluctuations arise due to transient threading of linear polymers through open ring chains stretching in flow.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Zhou Y,Hsiao KW,Regan KE,Kong D,McKenna GB,Robertson-Anderson RM,Schroeder CMdoi
10.1038/s41467-019-09627-7subject
Has Abstractpub_date
2019-04-15 00:00:00pages
1753issue
1issn
2041-1723pii
10.1038/s41467-019-09627-7journal_volume
10pub_type
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