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 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE
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