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Title

Slow dynamics of nanocomposite polymer aerogels as revealed by X-ray photocorrelation spectroscopy (XPCS)

AuthorsHernández, Rebeca ; Nogales, Aurora ; Sprung, Michael; Mijangos, Carmen ; Ezquerra, Tiberio A.
Issue Date2014
PublisherAmerican Institute of Physics
CitationJournal of Chemical Physics 140 (2014)
AbstractWe report on a novel slow dynamics of polymer xerogels, aerogels, and nanocomposite aerogels with iron oxide nanoparticles, as revealed by X-ray photon correlation spectroscopy. The polymer aerogel and its nanocomposite aerogels, which are porous in nature, exhibit hyper-diffusive dynamics at room temperature. In contrast, non-porous polymer xerogels exhibit an absence of this peculiar dynamics. This slow dynamical process has been assigned to a relaxation of the characteristic porous structure of these materials and not to the presence of nanoparticles. © 2014 AIP Publishing LLC.
URIhttp://hdl.handle.net/10261/94457
DOIhttp://dx.doi.org/10.1063/1.4861043
Identifiersdoi: 10.1063/1.4861043
issn: 0021-9606
e-issn: 1089-7690)
Appears in Collections:(ICTP) Artículos
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