Energy barriers at the ends of carbon nanotube bundles: Effects on interstitial adsorption kinetics

被引：29

作者：

Calbi, MM ^{[1
]}

Riccardo, JL

机构：

[1] So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[3] Univ Nacl San Luis, CONICET, Dept Fis, RA-5700 San Luis, Argentina

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.94.246103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the presence of adsorption sites and energy barriers near the ends of carbon nanotube bundles to determine their consequences on gas adsorption in the interstitial channels between the tubes. In the case of H-2 molecules adsorbing in bundles of closed (10,10) tubes, a high binding energy site followed by a potential barrier lie right before the entrance to the interstitial channels, producing a dramatic slowing down of interstitial adsorption kinetics.

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