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Pastimes : NNBM - SI Branch -- Ignore unavailable to you. Want to Upgrade?

To: lurqer who wrote (29039)	9/26/2003 11:34:02 AM
From: Clappy	Read Replies (1) \| Respond to of 104216

I'm not even close to understanding carbon nanotubes. I'm still trying to figure out how a satellite will be able to hold it up? How much mass will it require? Or does mass have nothing to do with it? If the satellite is revolving around the earth at the same rate as earth rotates, will that be enough to hold up the elevator? What stops it from being pulled back towards earth? -Clapernicus

To: lurqer who wrote (29039)	9/26/2003 12:30:25 PM
From: elpolvo	Read Replies (1) \| Respond to of 104216

l- the most wonderful use yet found for the laser... is to make carbon nanotubes <g> How to make nanotubes When the Rice University group found a relatively efficient way to produce bundles of ordered single-wall nanotubes in 1996, it opened new opportunities for quantitative experimental studies on carbon nanotubes. These ordered nanotubes are prepared by the laser vaporization of a carbon target in a furnace at 1200 °C. A cobalt-nickel catalyst helps the growth of the nanotubes, presumably because it prevents the ends from being "capped" during synthesis, and about 70-90% of the carbon target can be converted to single-wall nanotubes. By using two laser pulses 50 ns apart, growth conditions can be maintained over a larger volume and for a longer time. This scheme provides more uniform vaporization and better control of the growth conditions. Flowing argon gas sweeps the nanotubes from the furnace to a water-cooled copper collector just outside of the furnace. i suspect that the finest application of the carbon nanotubes will be to someday use them to make... snoccabolic ferrolaminates JMO (don't laugh)