I want to attach functionalized-carbon nano tube (thiolated-CNT) to
gold dots. I tried with diulated solution of CNT with the DMF in
different environments, i.e., at room temp., 40C, and 69C etc. But it
didn't appear that the CNT's ware coupling to the gold dots. Does
anybody have any suggestion of how to make the attachment of
functionalized-CNT with gold dots?

boram_07@yahoo.com writes:
I want to attach functionalized-carbon nano tube (thiolated-CNT) to
gold dots. I tried with diulated solution of CNT with the DMF in
different environments, i.e., at room temp., 40C, and 69C etc. But it
didn't appear that the CNT's ware coupling to the gold dots. Does
anybody have any suggestion of how to make the attachment of
functionalized-CNT with gold dots?

1) You don't describe either the gold particles or the
functionalization of the carbon nanotubes in any detail -- for the
nanotubes, we know only that there are some sulfur containing
groups involved, but not where they are bound or exactly what they
are. That makes it difficult to have terribly much concrete
advice.
2) You also don't mention what concentrations of either the
gold particles or the nanotubes, so it is hard to know how often we
would expect collisions between the two. You might want to consider
what sort of reaction rate function you should be expecting for
whatever reaction it is that you are trying to do.
3) Speaking of which, you are not describing the precise reaction you
are expecting. You mention no reagents other than the gold
particles and the carbon nanotubes. Are you expecting a spontaneous
reaction? What precisely is the nature of that reaction? If you
can't answer, why do you expect any reaction at all? If you can
answer, remember reagents are rarely if ever completely pure. You
might want to consider sort of impurities are in your materials. Is
the DMF dry? What might be in with the nanotubes from the
thiolation step? What might be mixed in with the gold particles?
4) Why in particular are you using DMF as a solvent? You aren't
running the reaction at particularly temperatures, and it doesn't
appear that you're expecting an SN2 reaction. You need to explain,
at least to yourself, the logic of the particular choice of
materials and reaction conditions you are using.

None of this is terribly specific, because you were not being specific
-- it is all stuff anyone could tell you without knowing anything
about what you're doing. That's because you haven't said anything much
about what you are doing. In general, my comment is that you're not
going to get terribly much useful advice when the amount of detail
that you present is so scanty.

Perry