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SUMMARY:Tunneling transport in conductor-insulator composites and the role
  of microstructure - Dr Claudio Grimaldi (EPFL\, Switzerland)
DTSTART:20110916T110000Z
DTEND:20110916T120000Z
UID:TALK31935@talks.cam.ac.uk
CONTACT:Dr Mark Miller
DESCRIPTION:In several classes of conductive composites the electron trans
 fer between the conducting particles is established by the quantum tunneli
 ng mechanism.  Although the microstrucures of\, for example\, nanofiber or
  nanotube composites differ markedly from those of granular metals or segr
 egated composites\, their common microscopic conduction mechanism calls fo
 r a unified description of their transport properties.  In this talk\, I i
 ntroduce and discuss a global tunneling network approach to conductor-insu
 lator composites\, where each conducting particle is connected to all othe
 rs via tunneling processes. I will show how the microstrucure properties o
 f composites govern the overall conductivity behavior and I will point out
  analogies and differences with respect to the usual continuum and/or latt
 ice percolation approaches.
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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