Surface-functionalized nanoparticles with liquid-like behavior: The role of the constituent components (Journal article)

Bourlinos, A. B./ Giannelis, E. P./ Zhang, Q./ Archer, L. A./ Floudas, G./ Fytas, G.

Ionically modified silica nanoparticles with large counter anions (sulfonate, isostearate) at two silica volume fractions (13 and 27%) form a viscous fluid and a glass but not crystalline solids. Dielectric spectroscopy, Brillouin scattering and shear rheometry were employed to investigate these new nanoparticle-based fluids. The glass transition temperature and hence the local dynamics are governed by the large counter anions, whereas the flow properties can be controlled by the spatial correlation between the nanoparticles, e.g. by tuning the volume fraction of hard cores and local interactions between segments in the soft corona. Liquid-like ordering of the cores was revealed by X-ray scattering and found to influence significantly the macroscopic flow properties of these salts.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
Keywords: 89,75,-k complex systems,83,10,tv structural and phase changes,62,25,+g mechanical properties of nanoscale materials,thermal-conductivity,ionic liquids,nanotube suspensions,dynamics,copolymers,nanofluids,nanostructures,polymers,oxide
ISSN: 1292-8941
Link: <Go to ISI>://000237974900013
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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