Nature of the bound states of molecular hydrogen in carbon nanohorns

被引：54

作者：

Fernandez-Alonso, F. ^{[1
]}

Bermejo, F. J.

Cabrillo, C.

Loutfy, R. O.

Leon, V.

Saboungi, M. L.

机构：

[1] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[2] Univ Pais Vasco EHU, Fac Ciencia & Tecnol, Unidad Asociada CSIC, Dept Elect & Elect, E-48080 Bilbao, Spain

[3] Univ Pais Vasco EHU, CSIC, Inst Estructura Mat, E-48080 Bilbao, Spain

[4] MER Corp, Tucson, AZ 85706 USA

[5] Univ Orleans, CNRS, Ctr Rech Mat Divisee, F-45071 Orleans 2, France

[6] UCL, Dept Phys & Astron, London WC1E 6BT, England

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.98.215503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effects of confining molecular hydrogen within carbon nanohorns are studied via high-resolution quasielastic and inelastic neutron spectroscopies. Both sets of data are remarkably different from those obtained in bulk samples in the liquid and crystalline states. At temperatures where bulk hydrogen is liquid, the spectra of the confined sample show an elastic component indicating a significant proportion of immobile molecules as well as distinctly narrower quasielastic line widths and a strong distortion of the line shape of the para -> ortho rotational transition. The results show that hydrogen interacts far more strongly with such carbonous structures than it does to carbon nanotubes, suggesting that nanohorns and related nanostructures may offer significantly better prospects as lightweight media for hydrogen storage applications.

引用

页数：4

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