Edge-Mediated Dislocation Processes in Multishell Carbon Nano-Onions?

被引:11
作者
Akatyeva, E. [1 ]
Huang, J. Y. [2 ]
Dumitrica, T. [1 ]
机构
[1] Univ Minnesota, Dept Mech Engn, Minneapolis, MN 55455 USA
[2] Sandia Natl Labs, Albuquerque, NM 87185 USA
关键词
NANOPARTICLES; DIAMOND; FULLERENES; PARTICLES; ENERGIES;
D O I
10.1103/PhysRevLett.105.106102
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report in situ electron microscopy observations of dislocation dissociation and annihilation processes in individual nanometer-sized carbon onions. Essential for these processes is the counter-intuitive motion of the 1/2 < 0001 > edge from the outer surface to the inner region, which cross-links or unlinks a large number of shells. The correlation with atomistic simulations and analysis of the energy which separates the strain and edge components indicates that this inward glide originates in the reduction of edge with each inwards glide step, an effect specific to the spherical topology.
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页数:4
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