C20: the smallest fullerene?

Parasuk, Vudhichai; Almlöf, Jan

doi:10.1016/0009-2614(91)87185-e

Cited by 132 publications

(56 citation statements)

References 19 publications

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“…11 Experimentally, ''C 20 -type'' film was synthesized by deposition of low-energy carbon clusters with a size distribution centered around C 20 -C 32 . 12 Raman spectra measured with the assembled film revealed the characteristics of sp 3 hybridization as that predicted for the C 20 fullerene. It is known that the growth process of C 20 film is difficult to observe experimentally.…”

Section: Introductionsupporting

confidence: 52%

“…12 Raman spectra measured with the assembled film revealed the characteristics of sp 3 hybridization as that predicted for the C 20 fullerene. It is known that the growth process of C 20 film is difficult to observe experimentally. Furthermore, the issues of growth and chemical bonding of disordered C 20 solids, which involve cluster-cluster interactions, cluster-surface interactions, and their competition, have not yet been addressed.…”

Section: Introductionsupporting

confidence: 52%

“…In addition, we found that within above energy range all the chemisorbed C 20 fullerenes still preserved their free cluster structure. It indicates that in the present simulation, the initial rotation has minor effect on the collision dynamics of C 20 . It can be understood from the spherelike geometry of C 20 .…”

Section: A Deposition Of Single C 20 Fullerene On Diamond Surfacementioning

confidence: 58%

“…The computed bond length was uniformly distributed in the interval from 0.144 to 0.153 nm, which is consistent with the ab initio method. 20 At the same time, the structure of two isomers, the C 20 bowl and ring, were also studied for comparison. The calculated binding energies of ring and bowl relative to cage were 4.92 and 3.45 eV/cluster higher, respectively.…”

Section: Computational Modelmentioning

confidence: 99%

“…It has been recently synthesized in a gas phase by Horst Prinzbach et al 7 and further confirmed theoretically by Mineo Satio et al 8 It is only composed of pentagons. Each carbon atom in a C 20 cage is bonded to three others with a bond angle of 108°, which is close to the tetrahedral bond angle. There have been many theoretical studies on the vibrational and electronic properties of the C 20 cluster.…”

Section: Introductionmentioning

confidence: 99%

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Memory effect in the deposition ofC20fullerenes on a diamond surface

Du¹,

Pan²,

Ho³

et al. 2002

Phys. Rev. B

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In this paper, the deposition of C 20 fullerenes on a diamond (001)-(2ϫ1) surface and the fabrication of C 20 thin film at 100 K were investigated by a molecular dynamics ͑MD͒ simulation using the many-body Brenner bond order potential. First, we found that the collision dynamic of a single C 20 fullerene on a diamond surface was strongly dependent on its impact energy. Within the energy range 10-45 eV, the C 20 fullerene chemisorbed on the surface retained its free cage structure. This is consistent with the experimental observation, where it was called the memory effect in ''C 20 -type'' films ͓P. Melion et al., Int. J. Mod. B 9, 339 ͑1995͒; P. Milani et al., Cluster Beam Synthesis of Nanostructured Materials ͑Springer, Berlin, 1999͔͒. Next, more than one hundred C 20 ͑10-25 eV͒ were deposited one after the other onto the surface. The initial growth stage of C 20 thin film was observed to be in the three-dimensional island mode. The randomly deposited C 20 fullerenes stacked on diamond surface and acted as building blocks forming a polymerlike structure. The assembled film was also highly porous due to cluster-cluster interaction. The bond angle distribution and the neighbor-atomnumber distribution of the film presented a well-defined local order, which is of sp 3 hybridization character, the same as that of a free C 20 cage. These simulation results are again in good agreement with the experimental observation. Finally, the deposited C 20 film showed high stability even when the temperature was raised up to 1500 K.

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