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World Record: Four-Centimeter-Long Carbon Nanotube
colonist writes "University of California scientists at Los Alamos National Laboratory and chemists from Duke University have recently grown a four-centimeter-long, single-wall carbon nanotube (SWNT): a new world record. Previous SWNTs were a few millimeters long. Yuntian Zhu and his colleagues used a process called 'catalytic chemical vapor deposition' from ethanol (alcohol) vapor. From their abstract: 'Our results suggest the possibility of growing SWNTs continuously without any apparent length limitation.' Zhu: 'although this discovery is really only a beginning, the continued development of longer length carbon nanotubes could result in nearly endless applications. Actually, the potential uses for long carbon nanotubes are probably limited only by our imagination.'"
Space elevator, here we come!
they'd have 13 inches already, without all that expensive equiptment!
Wonderous stuff, if only to know that the most brilliant uses for this haven't been thought of yet.
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Out cheaply, but production speed is almost as important as strand length.
..
yeah. used to take them whole weeks to make a car, once upon a time. something about 'industrialization' changed all that, though
; -- the corruption of government starts with its secrets. a truly free people keep no secrets. --
1/10th of a centimeter is a millimeter. 1/10000th of a centimeter is a micrometer. Anyway, at 11um/s, 4cm takes an hour. Geosynch takes a hundred thousand years. Better get started.
Finally! A year of moderation! Ready for 2019?
Geostationary orbital radius 38,785 km.
Growth rate 11x10^-6 m/s
elapsed time = 38,785,000 / 11x10^-6 = 3.526x10^12 s ~= 112,113 Years.
It going to be a long time till we have a swnt all the way at this rate.
PS yes I know that we don't have to have a single tube all the way there. We are going to have to ramp up the growth rate considerably though.
-- The morphemes of your disquisition are ascertainable, but they have eschewed an ambit of transpicuous exposition.
Answering my own question here, but it appears the article is correct. Metallic in this case is refering to the crystaline structure that the carbon forms. This gives the nanotube certain properties that are 'metallic' - High tensile strength, ductile, flexible, etc.
In Science News, June 14, 2003, Baughman's team of Univ of Texas made a single-walled carbon nanotube fiber composite that's the width of a human hair, and 100 to 200 meters long. The nanotubes are spun with polyvinyl alcohol, and are 4 times tougher than spider silk (the previous record-holder) as well as stronger (can hold more weight).
100-200 meters, that's a length you can do useful stuff. One weird thing is, they weave it in with ordinary cloth to make supercapacitors in clothing (for built-in antenna,s tiny batteries, et cetera). The field is called 'electronic textiles'!
A.
Hydrocoptic marselvanes here we come! What's next, prefamulated amulite?
Attention deficit disorder is a complicated issue, spanning several major... HEY LET'S GO RIDE BIKES!
Heh heh heh heh....
"Times have not become more violent. They have just become more televised."
-Marilyn Manson
There is no need for the fibers to be as long as the cable. Ever look at a rope?
Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
You unzip your fly in anticipation of a nanotube?
I know size isn't supposed to matter, but....
exactly what are you going to put in that nanotube?
A nanotubesnake?
-I like my women like I like my tea: green-
One thing that concerns me with nanotechnology is that the creation of all kinds of weird molecules that nature has no time to adapt to may leave us with some remarkably odd (and possibly pervasive) toxicity problems.
What if CNT's get widely adopted into clothing, tupperware, etc, and then 30 years down the line we find that the little fibers that inevitably break off when you handle such material get lodged in the lungs and induce cancer (like asbestos and other kinds of fibers do)?
I've heard of all kinds of interesting possible applications of CNT's (super strong fabrics and cables, conductive fabrics, electro-kinetic fabrics (generates electricity for your ipod just from you moving around)). But is anyone looking seriously into governing and exploring toxicity issues with these new synthetic molecules and materials?
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