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Phys. Rev. Lett. 100, 055702 (2008) [4 pages]

Dynamics of Nanoparticles in a Supercooled Liquid

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Chiara Caronna1,2, Yuriy Chushkin1, Anders Madsen1,*, and Antonio Cupane2
1European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble, France
2Department of Physical and Astronomical Sciences, via Archirafi 36, I-90123, Palermo, Italy

Received 30 July 2007; revised 19 December 2007; published 8 February 2008

The dynamic properties of nanoparticles suspended in a supercooled glass forming liquid are studied by x-ray photon correlation spectroscopy. While at high temperatures the particles undergo Brownian motion the measurements closer to the glass transition indicate hyperdiffusive behavior. In this state the dynamics is independent of the local structural arrangement of nanoparticles, suggesting a cooperative behavior governed by the near-vitreous solvent.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.055702
DOI:
10.1103/PhysRevLett.100.055702
PACS:
64.70.P−, 61.05.cf, 64.70.D−

*amadsen@esrf.fr