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SUMMARY:Electrical transport and optical properties of carbon nanotubes pr
 obed by in situ and cross-correlated experiments - Mathias Kobylko\, Unive
 rsity of Paris Sud\, France
DTSTART:20080304T150000Z
DTEND:20080304T160000Z
UID:TALK9926@talks.cam.ac.uk
CONTACT:Dr Jonathan Barnard
DESCRIPTION:In this talk\, I will present the results of two sets of exper
 iments which we performed in order to measure the electronic and structura
 l properties of the same individual carbon nanotube (CNT).\n\nIn the first
  part of my talk\, I will present experiments in which the conductance of 
 individual CNTs has been measured in-situ in a transmission electron micro
 scope (TEM) by dipping them into mercury. I will show that the measurement
  of an apparent conductance quantification in CNTs with this technique can
  be related to the formation of Hg-nanocontacts and not to an intrinsic pr
 operty of the CNTs\, as suggested by early works.\n\nIn the second part of
  my talk\, I will present experiments where the Raman Excitation Profile\,
  which gives optical information\, and the Electron Diffraction pattern\, 
 which gives structural information\, have been measured on the same indivi
 dual CNTs. These experiments can be used as a standard for testing state o
 f the art theories on optical properties of individual single-walled CNTs.
  In addition\, I will show that we evidenced new mechanical and electronic
  coupling effects in small bundles of CNTs.\n\nFinally\, I will briefly di
 scuss our recent development in in-situ transport and nano-manipulation TE
 M sample holders.
LOCATION:T001 [Tower Seminar Room]\, Materials Science and Metallurgy\, De
 partment of
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