Data di Pubblicazione:
2017
Citazione:
Fluctuating Elasticity Mode in Transient Molecular Networks / G. Nava, M. Rossi, S. Biffi, F. Sciortino, T. Bellini. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 119:7(2017 Aug 16).
Abstract:
Transient molecular networks, a class of adaptive soft materials with remarkable application potential, display complex, and intriguing dynamic behavior. By performing dynamic light scattering on a wide angular range, we study the relaxation dynamics of a reversible network formed by DNA tetravalent nanoparticles, finding a slow relaxation mode that is wave vector independent at large q and crosses over to a standard q-2 viscoelastic relaxation at low q. Exploiting the controlled properties of our DNA network, we attribute this mode to fluctuations in local elasticity induced by connectivity rearrangement. We propose a simple beads and springs model that captures the basic features of this q0 behavior.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
pPhysics and astronomy (all)
Elenco autori:
G. Nava, M. Rossi, S. Biffi, F. Sciortino, T. Bellini
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