Carbon Clusters: Thermochemistry and Electronic Structure at High Temperatures

2021 ◽  
Author(s):  
Maitreyee P. Sharma ◽  
Richard L. Jaffe ◽  
Marco Panesi
Keyword(s):  
Electronic Structure ◽  
High Temperatures ◽  
Carbon Clusters

scholarly journals Carbon Clusters: Thermochemistry and Electronic Structure at High Temperatures

2021 ◽  
Author(s):  
Maitreyee Sharma Priyadarshini ◽  
Richard Jaffe ◽  
Marco Panesi
Keyword(s):  
Electronic Structure ◽  
High Temperatures ◽  
Carbon Clusters

Production, Characterization, and Deposition of Carbon Clusters

1990 ◽  
Vol 206 ◽  
Author(s):  
Y. K. Bae ◽  
D. C. Lorents ◽  
R. Malhotra ◽  
C. H. Becker ◽  
D. Tse ◽  
...  
Keyword(s):  
High Temperatures ◽  
Thermal Desorption ◽  
Size Range ◽  
Ion Source ◽  
Carbon Clusters ◽  
Heating Process ◽  
Cluster Ion Source ◽  
Semiconductor Clusters ◽  
Cluster Ion ◽  
Wide Size Range

ABSTRACTWe have developed a new cluster ion source that can generate intense beams of metal and semiconductor clusters of a very wide-size range. With the source, we have observed intense beams of carbon clusters with mean cluster sizes of up to 4000 atoms/clusters. However, we have found that for generating small fullerenes, such as C60 and C70, the recently discovered technique by Kraetschmer et al. is much more efficient. By improving the technique, we have generated gram quantities of C60 and C70 and systematically investigated their thermal desorption properties. During the heating process, we have discovered that at high temperatures the bulk fullerenes, fullerite, transformed to another form of carbon, which still evaporates at temperatures above 700 C, but does not dissolve in benzene.

On the electronic structure of small cyclic carbon clusters

2008 ◽  
Vol 349 (1-3) ◽  
pp. 58-68 ◽  
Author(s):  
Kazim E. Yousaf ◽  
Peter R. Taylor
Keyword(s):  
Electronic Structure ◽  
Carbon Clusters

scholarly journals Электронная структура и диффузия натрия в Na-=SUB=-4-x-=/SUB=-K-=SUB=-x-=/SUB=-Mg(MoO_4)-=SUB=-3-=/SUB=-

2021 ◽  
Vol 63 (10) ◽  
pp. 1605
Author(s):  
Д.В. Суетин ◽  
А.В. Сердцев ◽  
Н.И. Медведева
Keyword(s):  
Electronic Structure ◽  
Ab Initio ◽  
Band Gap ◽  
High Temperatures ◽  
Sharp Increase ◽  
Ab Initio Methods ◽  
Two Dimensional ◽  
One Dimensional ◽  
And Migration ◽  
Sodium Diffusion

The electronic structure and sodium diffusion in Na4-xKxMg(MoO4)3 with an alluadite structure have been investigated by ab initio methods. It was found that this molybdate is an insulator with a band gap of 3.5 eV for x = 0.25. The most probable positions of potassium in the sodium sublattice have been determined, and the preferred pathways for sodium migration have been established. It has been shown that the barriers to sodium diffusion in Na4-xKxMg(MoO4)3 significantly depend on the composition, position of potassium, and migration path. The introduction of potassium leads to a significant decrease in the barriers to both one-dimensional (1D) and two-dimensional (2D) sodium diffusion. However, the presence of potassium in 1D channels can hinder the rapid migration of sodium, and a sharp increase in conductivity occurs only at high temperatures due to the order-disorder transition.

PRISTINE AND SILICON-SUBSTITUTED SMALL-CARBON-CLUSTERS AND FULLERENES: ELECTRONIC STRUCTURE AND REACTIVITY

2002 ◽  
pp. 1367-1420
Author(s):  
M. Solà ◽  
J. M. Cabrera-Trujillo ◽  
F. Tenorio ◽  
O. Mayorga ◽  
M. Cases ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Carbon Clusters

One- and Two-Dimensional Carbon Clusters: Isomers, Structures and Isomer Abundances.

1992 ◽  
Vol 270 ◽  
Author(s):  
Gert von Helden ◽  
Ming-Teh Hsu ◽  
Paul R. Kemper ◽  
Michael T. Bowers
Keyword(s):  
Electronic Structure ◽  
Electronic Structure Calculations ◽  
Dimensional Structure ◽  
Carbon Clusters ◽  
Two Dimensional ◽  
Growth Mechanisms ◽  
3 Dimensional ◽  
New Family ◽  
Ring Structures ◽  
Structure Calculations

ABSTRACTThe new technique of ion structural chromatography is applied to carbon clusters. The results indicate that C5+ and C6+ are purely linear but C7+, C8+, C9+ and C1O+ have both linear and monocyclic ring structures. From C11+ to C20+ only monocyclic ring structures are observed. At C21+, a new family of planar ring structures appears. The first 3 dimensional structure occurs at C29+ and the first fullerene at C30+. Isomer structure is verified by the comparison of experimental mobilities with those derived from theory for the various structures. For C20+ only the monocyclic ring is observed experimentally but electronic structure calculations suggest more compact structures might be lower in energy. The results are discussed in terms of possible growth mechanisms for C60.

Magnetic Susceptibility and Electronic Structure of CoSi and CoGe Alloys at High Temperatures

1975 ◽  
Vol 70 (2) ◽  
pp. 439-449 ◽  
Author(s):  
S. P. Dovgopol ◽  
V. A. Antropov ◽  
I. Z. Radovskii ◽  
P. V. Geld
Keyword(s):  
Magnetic Susceptibility ◽  
Electronic Structure ◽  
High Temperatures

Torelenes (t)-Cnas a New Class of Carbon Clusters. Electronic Structure of (t)-C200, (t)-C210, (t)-C276, and (t)-C408

1994 ◽  
Vol 2 (1) ◽  
pp. 1-11 ◽  
Author(s):  
E. G. Gal'pern ◽  
I. V. Stankevich ◽  
A. L. Chistyakov ◽  
L. A. Chernozatonskii
Keyword(s):  
Electronic Structure ◽  
Carbon Clusters ◽  
New Class
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