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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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl070192x
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.
|Subjects:||Physical Science > Quantum phenomena|
|Deposited By:||M T V|
|Deposited On:||16 Dec 2008 11:59|
|Last Modified:||16 Dec 2008 11:59|
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