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19 April 2024

» arxiv » 2007.11860

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Protein-like dynamical transition of hydrated polymer chains
L. Tavagnacco ; M. Zanatta ; E. Buratti ; B. Rosi ; B. Frick ; F. Natali ; J. Ollivier ; E. Chiessi ; M. Bertoldo ; E. Zaccarelli ; A. Orecchini ;
Date:	23 Jul 2020
Abstract:	Combining elastic incoherent neutron scattering experiments at different resolutions and molecular dynamics simulations, we report the observation of a protein-like dynamical transition in Poly(N-isopropylacrylamide) chains. We identify the onset of the transition at a temperature Td of about 225~K. Thanks to a novel global fit procedure, we find quantitative agreement between measured and calculated polymer mean-squared displacements at all temperatures and time resolutions. Our results confirm the generality of the dynamical transition in macromolecular systems in aqueous environments, independently of the internal polymer topology.
Source:	arXiv, 2007.11860
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