Atmosphere-induced change of microhardness and plasticity of C60 single crystals and polycrystalline films

被引：11
作者：
Manika, I
Maniks, J
Kalnacs, J
机构：
[1] Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia
[2] Latvian Acad Sci, Inst Phys Energet, LV-1006 Riga, Latvia
来源：
CARBON | 1998年 / 36卷 / 5-6期
关键词：
fullerene; oxidation; intercalation; mechanical properties;
D O I：
10.1016/S0008-6223(98)00033-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of air exposure and visible light illumination on the microhardness, plasticity and dislocation mobility in the C-60 single crystals was investigated. Microhardness values for defined structural states of the fullerene (pristine, oxygen-intercalated, photo-oxidized) are reported. It has been shown that oxygen intercalation in the fullerene lattice during air-aging in the dark results in the suppression of dislocation mobility. However, only a slight increase in the hardness of oxygenated samples was observed. A remarkable increase in the hardness and decrease in the plasticity of the C-60 crystals under illumination-assisted air exposure was noted. Photochemical transformation was found to be localized in the nearsurface layer of 1-5 mu m. The data on the recovery of the micromechanical properties of the photo-oxidized surface layer under heating in air are presented. (C) 1998 Elsevier Science Ltd,All rights reserved.
引用
收藏
页码：641 / 644
页数：4
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