Fullerenes, Graphitic Smokes and the Nature of Planetary Gases

Details Fullerenes, Graphitic Smokes and the Nature of Planetary Gases Fullerenes, Graphitic Smokes and the Nature of Planetary Gases

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....8163b&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #8163

Other

Scientific paper

We have begun to carry out experiments on synthetic material "graphitic smokes" to evaluate the noble gases in the larger fullerene cages. Graphitic smokes (GS) are produced by electrically heating a hollowed out graphite rod in a noble gas atmosphere. The hollow graphite rod allows the C to condense out of the gas more uniformly in comparison to the Kratschmer arc evaporator synthesis of fullerenes. Some of these carbonaceous condensates were analyzed for Xe and values as high as 13.7 × 10-6 cm^3 STP/bm of 132Xe were obtained. This is some 2X magnitude greater than typical 132Xe amounts for other synthesized carbonaceous residues. We obtained some graphitic smokes synthesized in a noble gas mixture (49% neon, 49% argon, 1% Xe and 1% Kr with the balance of pressure coming from He) and used our fullerene extraction protocol to determine whether fullerene was a carrier phase for the noble gases measured in the graphitic smoke material. Preliminary measurements of He and Ne in toluene extracted graphitic smokes residues (100 μg) indicated that fullerene (mostly C60 and C70) is indeed a carrier phase. Our yield for He corresponds to one ^4He per 880,000 fullerene molecules and is similar to the abundances measured in synthetic fullerenes produced in the arc evaporator. We are continuing our studies of the graphitic smokes with emphasis on the isolation and separation of the larger cages (C84-C200) and direct measurements of the noble gases. The graphitic smokes will be prepared with various mixtures of noble gases of known composition and extracted for fullerenes. The very efficient trapping of Xe in the graphitic smokes strongly suggests a more significant role for the larger fullerene cages to encapsulate the heavy noble gases. A more complete characterization of the larger fullerene cages may well lead to a better understanding of the nature of planetary atmospheres.

Affiliated with

Also associated with

No associations

Rating

Fullerenes, Graphitic Smokes and the Nature of Planetary Gases does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fullerenes, Graphitic Smokes and the Nature of Planetary Gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fullerenes, Graphitic Smokes and the Nature of Planetary Gases will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-844488