Friday, March 17, 2006

Carbon - nanotechnology

1. TUNGSTEN and CARBON - as light filaments. Surely it is not just the heat that makes a tungsten or carbon diode glow, but the voltage and current itself. So carbon should come out ahead eventually in a light per volt contest. If we can build a carbon filament out of nanotubes--by weaving and bonding the filaments with the right amount of radiation -- we may have a tough and brilliant lightbulb.

2. Carbon nanotubes are lightweight, stronger than steel, stiff as diamonds, and way better conductors of electricity and heat than any other known materials. This is carbon we are talking about. Thank you Sumio Iijima (NEC lab in Tokyo 1991). Picture chicken wire rolled into cylinders with an average diameter of a nanometer, or the approximate width of a DNA molecule. Now, how do we coerce these tubes, only a few micrometers long, into fiber? It took chemists 50+ years to make carbon-based polyethylene into usable material. It appears that nanotubes can be bonded together to unitize without congealing or losing strength by irradiating the line. Still, how do we get the line -- how do we "weave" the fiber? This is where I think we have to look at centrifuge or natural "spinning" effects. Not just chemistry.

2 comments:

  1. Right now, the strongest polymeric fiber in the world is Zylon. Kumar, AFRL in Dayton, added small carbon nanotubes to the chemical precursor of Zylon fibers, and increased its strength by 50%.

    ReplyDelete
  2. FIBONACCI NUMBERS. Discovered by mathematician Leonardo Fibonacci in the 12th century.

    Cracked the code on precisely how the Egyptians built the pyramids.

    Fibonacci is a proven “golden ratio” of 1.618. We call this the balances everything...geometrically. The spiral proportion of sunflower seeds,

    But it isn’t just the sequence of the numbers, it’s the actual ratio (sometimes called the “golden ratio” or “divine proportion”) that is so stunningly accurate. Fact is, the universe is smarter than all of us and doesn’t make mistakes.

    The beautiful complexity is this. The golden ratio has a fundamental function in nature:

    Take the sunflower for example. Have you noticed its opposing spirals of seeds? There’s a 1.618 ratio between the diameter of each rotation.

    Your Vitruvian body: First measure head to toe. Then divide by the distance from belly button to feet. And if that’s still not enough for you, measure from shoulder to fingertips. Then divide that number by the length from your elbow to fingertips.

    You’ll quickly see the fascinating truth emerge over and over. The timeless “divine proportion” in the area of 1.618 seems to be unavoidable.

    Reference: Fan, Numbers, Retracement, Ratio, Spiral, Math, Investing tools/applications, Geometry (cf tetrahedron/pyramids).

    The Carbon molecule is a tetrahedron. This is THE code/shape that Fibbonacci was cracking....

    ReplyDelete