Electronic properties of oxidized carbon nanotubes

被引:380
作者
Jhi, SH [1 ]
Louie, SG
Cohen, ML
机构
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA
关键词
D O I
10.1103/PhysRevLett.85.1710
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The effect of oxygenation on the electronic properties of semiconducting carbon nanotubes is studied from first principles. The O-2 is found to bind to a single-walled nanotube with an adsorption energy of about 0.25 eV and to dope semiconducting nanotubes with hole carriers. Weak hybridization between carbon and oxygen is predicted for the valence-band edge states. The calculated density of states shows that weak coupling leads to conducting states near the band gap. The oxygen-induced gap closing for large-diameter semiconducting tubes is discussed as well. The influence of oxygen on the magnetic property is also addressed through a spin-polarized calculation and compared to experiment.
引用
收藏
页码:1710 / 1713
页数:4
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