Transformation of graphite into nanodiamond following extreme electronic excitations

被引：42
作者：
Dunlop, A. [1 ]
Jaskierowicz, G. [1 ]
Ossi, P. M. [2 ]
Della-Negra, S. [3 ]
机构：
[1] Ecole Polytech, CEA, DRECAM, Lab Solid Irradies, F-91128 Palaiseau, France
[2] Politecn Milan, Ctr NanoEngineered Mat & Surfaces, I-20133 Milan, Italy
[3] CNRS, IN2P3, Inst Phys Nucl, F-91406 Orsay, France
来源：
PHYSICAL REVIEW B | 2007年 / 76卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.76.155403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Graphite targets have been irradiated at 90 K and 300 K with 850 MeV and 6 GeV lead ions and with 20-30 MeV fullerene cluster ions in a large range of fluences. Damage creation was studied both by transmission electron microscopy and Raman spectroscopy. The very strong energy density deposited in electronic processes generates a highly excited region around the projectile path. The relaxation of the deposited energy via hydrodynamic expansion and shock-wave propagation leads to the formation of small defective graphitic domains and of nanocrystalline diamond particles.
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页数：14
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