Nano Archive

Breakdown of the continuum Stokes-Einstein relation for nanoparticle diffusion

Tuteja, Anish and Mackay, Michael E. and Narayanan, Suresh and Asokan, Subashini and Wong, Michael S. (2007) Breakdown of the continuum Stokes-Einstein relation for nanoparticle diffusion. NANO LETTERS, 7 (5). pp. 1276-1281. ISSN Print Edition ISSN: 1530-6984; Web Edition ISSN: 1530-6992

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Cadmium selenide nanoparticles are found to diffuse approximately 200 times faster in a polymeric liquid than predicted by the Stokes-Einstein relation. This remarkable behavior is hypothesized to be due to the nanoparticles being smaller than the entanglement mesh to create a frictional drag that does not follow continuum expectations, in line with a theoretical calculation presented before. This is one of the first demonstrations of X-ray photo correlation spectroscopy applied to polymeric liquids, which we use to explain the simultaneous 60% viscosity reduction of the mixture through a proposed constraint release mechanism.

Item Type:Article
Subjects:Physical Science > Quantum phenomena
ID Code:2206
Deposited By:M T V
Deposited On:16 Dec 2008 11:59
Last Modified:16 Dec 2008 11:59

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