🚀 go-pugleaf

In article <37166aeb.34602@news.club-internet.fr>, j-p.g@wanadoo.fr wrote:

> Dans le suppl�ment "INTERACTIF" du Monde dat� du 14 avril 1999
> il est signal� que des chercheurs suisses  (de B�le ?) ont montr� 
> (en 1999 ?) que l'ADN pouvait se comporter comme un semi-conducteur.
> 
> Quelqu'un connaitrait-il (OU pourrait-il m'aider � retrouver)
> la r�f�rence bibliographique de ces travaux ?

La voici, et bonne lecture.

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UI  - 182PW-0048
AU  - Fink HW
AU  - Schonenberger C
TI  - Electrical conduction through DNA molecules
SO  - Nature 1999 Apr 1;398(6726):407-410
IS  - 0028-0836
MH  - Holography
AB  - The question of whether DNA is able to transport electrons has
      attracted much interest, particularly as this ability may play a
      role as a repair mechanism after radiation damage to the DNA
      helix(1). Experiments addressing DNA conductivity have involved a
      large number of DNA strands doped with intercalated donor and
      acceptor molecules, and the conductivity has been assessed from
      electron transfer rates as a function of the distance between the
      donor and acceptor sites(2,3). But the experimental results remain
      contradictory, as do theoretical predictions(4). Here we report
      direct measurements of electrical current as a function of the
      potential applied across a few DNA molecules associated into single
      ropes at least 600 nm long, which indicate efficient conduction
      through the ropes. We find that the resistivity values derived fi om
      these measurements are comparable to those of conducting polymers,
      and indicate that DNA transports electrical current as efficiently
      as a good semiconductor. This property, and the fact that DNA
      molecules of specific composition ranging in length from just a few
      nucleotides to chains several tens of micrometres long can be
      routinely prepared, makes DNA ideally suited for the construction of
      mesoscopic electronic devices. [References: 8]
LG  - English
SB  - Current Contents(R)/Agriculture, Biology & Environmental Sciences
      Current Contents(R)/Life Sciences
      Current Contents(R)/Physical, Chemical & Earth Sciences
IN  - Fink HW
      Univ Basel, Inst Phys
      Klingelbergstr 82
      CH-4056 Basel
      Switzerland
      
      Univ Basel, Inst Phys
      CH-4056 Basel
      Switzerland