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Complexity Digest 2000.49 - 13
http://comdig.unam.mx/index.php?id_issue=2000.49#1250
04-Dec-2000

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Direct Observation Of	 Molecular Cooperativity Near The Glass Transition,
Nature
 









Excerpt: The increasingly sluggish response of a
supercooled liquid as it nears its glass transition (for example,
refrigerated honey) is prototypical of glassy dynamics found in
proteins, neural networks and superconductors. The notion that
molecules rearrange cooperatively has long been postulated to
explain diverging relaxation times and broadened (non-exponential)
response functions near the glass transition. (…). Here we
describe direct observations of molecular cooperativity near the
glass transition in polyvinylacetate (PVAc), using nanometre-scale
probing of dielectric fluctuations.



Direct
Observation Of Molecular Cooperativity Near The Glass
Transition, E. Vidal
Russell, N. E. Israeloff, Nature 408, 695 - 698,
12/7/2000


 

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