Re: [Sci.nanotech] Carbon Games


mike wrote:

the text. Sorry for that, was intended to be all carbon.
The other things like 'normal temp' you refer to?
It's hot, that's what the laser's for, to 'keep it active' a gas.

Carbon vaporizes at a high temperature, which would destroy the silicon barrier
you want to feed it through. (It is estimated to melt above 4500 deg K
<http://stinet.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA112977>).

If you want reactive carbon, it would be easier to start with a reactive
carbon-containing molecule, and arrange for it to decompose or react at the
site you want it too. Lasers could be used to cause or help the reaction.

A silicon partition with six laser made perforations
(single carbon atom sized) in a hexagon pattern.
A carbon atom is order of magnitude the same size as a silicon
atom. To make a "perforation" this size in a silicon surface would
imply somehow removing individual silicon atoms with a laser.

Which i have read has been done. [might not be silicon, though]

Silicon is not so rigid at this scale as Perry mentioned. There are
silicon-containing materials called zeolites, with interesting small holes
(<http://en.wikipedia.org/wiki/Zeolite>) and you are right that molecule-sized
holes can make interesting reactions occur (see
<http://www.che.caltech.edu/groups/med/catmat.html> for an overview).
Having small holes, makes them a bit delicate at higher temperatures though.

So the problem is then to find the right molecules and the right sort of holes
and the right conditions for the reactions you want to happen.

Toby

.

Relevant Pages

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