From: Anders Sandberg (asa@nada.kth.se)
Date: Tue Aug 20 2002 - 07:34:10 MDT
On Tue, Aug 20, 2002 at 06:07:25AM -0700, Robert J. Bradbury wrote:
>
> Right now I'm of the opinion that an enzyme to manufacture small
> diameter nanotubes might be very difficult, perhaps impossible,
> but an enzyme to manufacture large diameter nanotubes might be
> feasible.
Too many strained bonds?
Another enzyme to look for would be one to link nanotube endcaps.
Preferably it should link three tubes a time into a Y, so that one gets a
polymer with redundancy and force distribution.
> Ideally one would like to design a system to "grow"
> the elevator using atmospheric carbon dioxide as the raw material.
Hey! You are trying to sneakily stop the greenhouse effect, aren't you?!
I'm sure you have no consideration for us summer- and warmth-deprived
Swedes! :-)
Reducing the CO2 from the current ~766 billion tons to 578 billion
tons (1700 levels) would give 4700 tons of carbon per meter beanstalk -
a cross section of 383 square meters (diameter ~20 meters) if it has
diamond density).
-- ----------------------------------------------------------------------- Anders Sandberg Towards Ascension! asa@nada.kth.se http://www.nada.kth.se/~asa/ GCS/M/S/O d++ -p+ c++++ !l u+ e++ m++ s+/+ n--- h+/* f+ g+ w++ t+ r+ !y
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