🚀 go-pugleaf

In article <phrjz0#@lynx.unm.edu> swami@chtm.eece.unm.edu (Swami srinivasan) writes:
>
>	have a nagging question...
>
>	Recently someone from Arizona (Hoffman's (?) group) came over
>to UNM to talk about fullerenes. He was once a grad student studying 
>inter-galactic clouds or something like that, when Fullerenes were
>discovered.
>
>	He mentioned that fullerenes can also be made by MBE growth.
>Being a compound semiconductors person, i am used to the concept of
>MBE being used to grow thin films/superlattices, etc. Except for 
>some 3-D defects, the growth usually is uniform across the wafer (at 
>that's what we try to do most of the time).
>
Are you sure that the fullerenes are formed in the MBE process?  I do know
of work involving the sublimation of fullerenes in MBE machines (where the
"molecule" in MBE is the fullerene) to form single crystal thin films.
As far as I know, you cannot form C60 and C70 from C atoms in a MBE environment.


>	How does a fullerene form? i would have expected a flat
>thin film of C to deposit. What makes the few atoms that first contact
>the substrate to grow upward, with the "prior" knowledge of  C-60
>geometry? How does the structure actually grow and under what special
>conditions (in an MBE)? Can these be grown with MOCVD?

As I said above, I doubt it.

>=======================================================================
>swaminathan srinivasan
>center for high tech materials
>univ. of new mexico, albuquerque		cogito ergo sum
>
>swami@chtm.eece.unm.edu
>=======================================================================

Grower of single crystal magnetic oxide materials (iron oxide, nickel oxide):

Scott D. Berry    Assistant Professor of Physics    Florida State University
315 Keen Bldg, B-159, Tallahassee, FL 32306-3016    (904) 644-1218
INTERNET:   berry@redbeard.physics.fsu.edu    BITNET:   berry@fsu