Helical automated fabrication
eugen at leitl.org
Fri Oct 13 12:26:18 EDT 2006
On Fri, Oct 13, 2006 at 12:03:59PM -0400, Kragen Javier Sitaker wrote:
> On Thu, 12 Oct 2006 09:06:13 +0200, Eugen Leitl wrote:
> > On Wed, Oct 11, 2006 at 05:54:34PM -0400, Kragen Javier Sitaker wrote:
> > > On Thu, 7 Sep 2006 09:57:40 +0200, Eugen Leitl wrote:
> > > > This also works on nanoscale, but even better. A cumulene
> > > > extruded through a (fluorine-terminated) carbon nanotube lumen
> > > > would polymerize into a wide range of polymers (diamond included)
> > > > under numerical (6DOF, or just 3DOF) control.
> > >
> > > Can I forward this to kragen-discuss? Is this theoretical, or has it
> > > been tried?
> > It's theoretical, but cumulenes do polymerize, and just how
> > is dictated by geometry, which is under very good control (basically,
> > no degrees of freedom) at a carbon-nanotube (fluorine-terminated,
> > preferrably) lumen terminus, and a flat (HOPG, or diamond) surface.
> > Feel free to forward it, but I doubt it will produce much additional
> > information.
> (sending to list now)
> Why is it theoretical? What are the obstacles to trying it?
You'd need an experiment to prod cumulenes (HOPG is a natural
substrate for this) with SPMs and AFMs. I have not looked, but afaik
this hasn't been done before.
Functionalizing a tip with a SWNT-cumulene endocomplex would
be reasonably difficult experimentally, though it can be done
in principle. It's just statistically improbable, so you need
a large number of experiments.
If you know anyone who's interested in funding this, I'd be interested
to get in touch with that person.
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
ICBM: 48.07100, 11.36820 http://www.ativel.com
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